Difference between revisions of "Stepper Recipes"

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{{recipes|Lithography}}
+
{{recipes|Lithography}}  
 +
[[category: Lithography]]
  
Below is a listing of stepper lithography recipes. Based on your sample reflectivity, absorption, and surface topography the exposure time / focus offset parameters may vary. This listing is a guideline to get you started.  The recipes are tabulated to give you the values of the key parameters you will need to establish your recipe. For wafer cleaning and preparation including HMDS use, please refer to the cleaning and preparation section in the lithography section of this web site. Post develop bakes (not listed) are used to make the resist more etch resistant and depend on subsequent processes. Care should be taken with post development bakes as resist reflow can occur. Unless otherwise noted, all exposures are done on flat, silicon wafers.
+
Below is a listing of stepper lithography recipes.  
 +
Stepper 1 and Stepper 2 are i-line systems with good piece handling capabilities.  Stepper 3 is a DUV (248nm) system primarily used for full 100mm wafers.  DUV resists do not work for i-line and i-line resists do not work for DUV.  Based on your sample reflectivity, absorption (or whether or not you use an ARC layer), and surface topography, the exposure time / focus offset parameters may vary.  
  
Parameters are indicated in separate tables for each stepper system. Multiply the exposure times by 0.30 (from the 6300 system) to get a starting exposure time for the GCA Autostep200 system. You will need to do an exposure array to get precise times for the Autostep system. In general, the resolution achievable is ~ 100 nm smaller for the Autostep200 system.
+
This listing is a guideline to get you started. For critical lithography steps, you should run your own exposure and/or focus array to determine the proper parameters.
 +
 
 +
The recipes are tabulated to give you the values of the key parameters you will need to establish your recipe. Underlayers such as LOL2000 or PMGI can be used on the stepper systems.  See the underlayer datasheets for details.   Post develop bakes (not listed) are used to make the resist more etch resistant and depend on subsequent processes. Care should be taken with post development bakes as resist reflow can occur. Unless otherwise noted, all exposures are done on flat, silicon wafers.
 +
 
 +
Parameters are indicated in separate tables for each stepper system.  
  
 
=[[Stepper 1 (GCA 6300)]]=
 
=[[Stepper 1 (GCA 6300)]]=
==Positive Resist (GCA 6300)== <!--Note that if this heading is changed, the recipe links on the Lithography page must be changed-->
+
 
 +
Multiply the GCA 6300 exposure times by 0.30 to get a starting exposure time for the GCA Autostep200 system.
 +
 
 +
==Positive Resist (GCA 6300)== <!--Note that if this heading is changed, the recipe links on the Lithography page must be changed-->  
 +
 
 
Unless otherwise noted, bakes are on hot plates. For recipes with CEM, the CEM is spun on after the first resist bake, exposure is then done, and the CEM is rinsed off with DI water before the PEB. CEM generally improves resolution and process tolerance at the expense of higher exposure time.  
 
Unless otherwise noted, bakes are on hot plates. For recipes with CEM, the CEM is spun on after the first resist bake, exposure is then done, and the CEM is rinsed off with DI water before the PEB. CEM generally improves resolution and process tolerance at the expense of higher exposure time.  
{| border="1" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" class="wikitable"
+
 
|-bgcolor="#D0E7FF"
+
{| class="wikitable" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" border="1"
!width=100|Resist
+
|- bgcolor="#D0E7FF"
!width=100|Spin Cond.
+
! width="100" |Resist
!width=75|Bake
+
! width="100" |Spin Cond.
!width=75|Thickness
+
! width="75" |Bake
!width=125|Exposure Time
+
! width="75" |Thickness
!width=100|Focus Offset
+
! width="125" |Exposure Time
!width=75|PEB
+
! width="100" |Focus Offset
!width=100|Developer
+
! width="75" |PEB
!width=125|Developer Time
+
! width="100" |Developer
!width=300|Comments
+
! width="125" |Developer Time
 +
! width="300" |Comments
 
|-
 
|-
|SPR955CM0.9
+
|[[Media:SPR955-Positive-Resist-Datasheet.pdf|SPR955CM0.9]]
 
|3 krpm/30”
 
|3 krpm/30”
 
|95°C/60”
 
|95°C/60”
Line 30: Line 41:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
 
*0.5 um isolated lines
 
*0.5 um isolated lines
 
*{{fl|SPR955CMstepperrecipe.pdf|See SPR955CM data file}}
 
*{{fl|SPR955CMstepperrecipe.pdf|See SPR955CM data file}}
 +
 
|-
 
|-
|SPR955CM0.9
+
|[[Media:SPR955-Positive-Resist-Datasheet.pdf|SPR955CM-0.9]]
 
|3 krpm/30”
 
|3 krpm/30”
 
|95°C/60”
 
|95°C/60”
Line 43: Line 55:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
*0.5 um isolated lines
+
*0.5 um holes
 
*Much longer exposure time for dense isolated holes
 
*Much longer exposure time for dense isolated holes
 
*{{fl|SPR955CMstepperrecipe.pdf|See SPR955CM data file}}
 
*{{fl|SPR955CMstepperrecipe.pdf|See SPR955CM data file}}
 +
 
|-
 
|-
|SPR955CM0.9<br>
+
|[[Media:SPR955-Positive-Resist-Datasheet.pdf|SPR955CM-0.9]]<br>  
CEM365iS
+
[[Media:CEM365iS-Contrast-Enhancement-Datasheet.pdf|CEM365iS]]
|3 krpm/30”<br>
+
|3 krpm/30”<br>  
5 krpm/30”
+
5 krpm/30”  
 
|95°C/90”
 
|95°C/90”
 
|~ 0.9 um
 
|~ 0.9 um
Line 59: Line 72:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
*0.35um isolated lines by SEM measurement.
+
*0.35um isolated spaces by SEM measurement.
 
*Higher exposure time due to CEM
 
*Higher exposure time due to CEM
 
*{{fl|SPR955CMstepperrecipe.pdf|See SPR955CM data file}}
 
*{{fl|SPR955CMstepperrecipe.pdf|See SPR955CM data file}}
 +
 
|-
 
|-
 
|SPR950-0.8
 
|SPR950-0.8
Line 73: Line 87:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
 +
 
 
|-
 
|-
|SPR955CM-1.8
+
|[[Media:SPR955-Positive-Resist-Datasheet.pdf|SPR955CM-1.8]]
 
|4 krpm/30”
 
|4 krpm/30”
 
|90°C/90”
 
|90°C/90”
Line 84: Line 99:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
 
*0.5 um isolated lines
 
*0.5 um isolated lines
 
*{{fl|spr955_1.8GCA6300.pdf|See 955CM-1.8 data file}}
 
*{{fl|spr955_1.8GCA6300.pdf|See 955CM-1.8 data file}}
 +
 +
|-
 +
|[[Media:SPR955-Positive-Resist-Datasheet.pdf|SPR955CM-1.8]]
 +
|4 krpm/30”
 +
|90°C/90”
 +
|~ 1.8 um
 +
|1.7”
 +
| -5
 +
|110°C/90”
 +
|AZ300MIF
 +
|60"
 +
| align="left" |
 +
*1 um isolated posts
 +
*{{fl|spr955_1.8GCA6300.pdf|See 955CM-1.8 data file}}
 +
 
|-
 
|-
|SPR220-3.0
+
|[[Media:SPR220-Positive-Resist-Datasheet.pdf|SPR220-3.0]]
 
|2.5 krpm/30”
 
|2.5 krpm/30”
 
|115°C/90”
 
|115°C/90”
Line 97: Line 127:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
 
*0.5 um isolated lines
 
*0.5 um isolated lines
 
*{{fl|SPR-220-3.0_OptimizationNew.pdf|See SPR220-3 Data File}}
 
*{{fl|SPR-220-3.0_OptimizationNew.pdf|See SPR220-3 Data File}}
 +
 
|-
 
|-
|SPR220-7.0
+
|[[Media:SPR220-Positive-Resist-Datasheet.pdf|SPR220-7.0]]
 
|3.5 krpm/45”
 
|3.5 krpm/45”
 
|115°C/120”
 
|115°C/120”
Line 107: Line 138:
 
|4.5”
 
|4.5”
 
|0
 
|0
|*50°C/60”<br>
+
|*50°C/60”<br>  
115°C/90”
+
115°C/90”  
 +
 
 
|AZ300MIF
 
|AZ300MIF
 
|120"
 
|120"
|align="left"|
+
| align="left" |
*1.0 um isolated lines; 1.25 um isolated spaces
+
*1.0 um isolated lines; 1.25 um isolated spaces  
*&#42;Let sample sit in air for 20 minutes before PEB, step to 50°C for 60” first, then 115°C
+
**Let sample sit in air for 20 minutes before PEB, step to 50°C for 60” first, then 115°C
 
*{{fl|SPR-220-7.0stepperrecipe.pdf|See SPR220-7 Data File}}
 
*{{fl|SPR-220-7.0stepperrecipe.pdf|See SPR220-7 Data File}}
|-
+
 
 
|}
 
|}
  
==Negative Resist (GCA 6300)== <!--Note that if this heading is changed, the recipe links on the Lithography page must be changed-->
+
==Negative Resist (GCA 6300)== <!--Note that if this heading is changed, the recipe links on the Lithography page must be changed-->  
Unless otherwise noted, bakes are on hot plate. All flood exposures are done in broadband light using any contact aligner. Also, because the tone is negative, a shorter first exposure time will result in more undercut, which is desirable for single-layer lift-off processes. Under these conditions more develop time will also give more undercut.
+
 
{| border="1" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" class="wikitable"
+
Unless otherwise noted, bakes are on hot plate. All flood exposures are done in broadband light using any contact aligner. Also, because the tone is negative, a shorter first exposure time will result in more undercut, which is desirable for single-layer lift-off processes. Under these conditions more develop time will also give more undercut.  
|-bgcolor="#D0E7FF"
+
 
!width=100|Resist
+
{| class="wikitable" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" border="1"
!width=100|Spin Cond.
+
|- bgcolor="#D0E7FF"
!width=75|Bake
+
! width="100" |Resist
!width=75|Thickness
+
! width="100" |Spin Cond.
!width=125|Exposure Time
+
! width="75" |Bake
!width=100|Focus Offset
+
! width="75" |Thickness
!width=75|PEB
+
! width="125" |Exposure Time
!width=75|Flood
+
! width="100" |Focus Offset
!width=100|Developer
+
! width="75" |PEB
!width=125|Developer Time
+
! width="75" |Flood
!width=300|Comments
+
! width="100" |Developer
 +
! width="125" |Developer Time
 +
! width="300" |Comments
 
|-
 
|-
|AZ5214
+
|[[Media:AZ5214-Negative-Resist-Datasheet.pdf|AZ5214]]
 
|6 krpm/30”
 
|6 krpm/30”
 
|95°C/60”
 
|95°C/60”
Line 144: Line 178:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
*0.5 um res. possible, but resist is sensitive to environment
+
*0.7 um res. possible&nbsp;
 +
 
 
|-
 
|-
|nLOF5510
+
|[[Media:AZnLOF5510-Negative-Resist-Datasheet.pdf|nLOF5510]]
 
|3 krpm/30”
 
|3 krpm/30”
 
|90°C/60”
 
|90°C/60”
Line 157: Line 192:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
 
*0.5 um line openings good dense or isolated
 
*0.5 um line openings good dense or isolated
 
*Use heated 1165 stripper for removal or lift-off
 
*Use heated 1165 stripper for removal or lift-off
 
*{{fl|nLOF5510stepperrecipe.pdf|See nLOF5510 data file}}
 
*{{fl|nLOF5510stepperrecipe.pdf|See nLOF5510 data file}}
 +
 
|-
 
|-
|nLOF2020
+
|[[Media:AZnLOF2020-Negative-Resist-Datasheet.pdf|nLOF2020]]
 
|4 krpm/30”
 
|4 krpm/30”
 
|110°C/60”
 
|110°C/60”
Line 172: Line 208:
 
|AZ300MIF
 
|AZ300MIF
 
|90"
 
|90"
|align="left"|
+
| align="left" |
 
*~ .85 um line opening/lift-off good. Isolated mesas can be smaller.
 
*~ .85 um line opening/lift-off good. Isolated mesas can be smaller.
 
*Use heated 1165 stripper for removal or lift-off Sensetive to PEB temp.
 
*Use heated 1165 stripper for removal or lift-off Sensetive to PEB temp.
 
*{{fl|nLOF2020stepperrecipe.pdf|See nLOF2020 Data File}}
 
*{{fl|nLOF2020stepperrecipe.pdf|See nLOF2020 Data File}}
|-
+
 
 
|}
 
|}
  
 
=[[Stepper 2 (AutoStep 200)]]=
 
=[[Stepper 2 (AutoStep 200)]]=
{{Todo|Have Brian double check the exposure times.}}
+
 
{{Todo|Are the "more information" sheets valid for both tools?}}
+
==Positive Resist (AutoStep 200)== <!--Note that if this heading is changed, the recipe links on the Lithography page must be changed-->  
==Positive Resist (AutoStep 200)== <!--Note that if this heading is changed, the recipe links on the Lithography page must be changed-->
 
 
Unless otherwise noted, bakes are on hot plates. For recipes with CEM, the CEM is spun on after the first resist bake, exposure is then done, and the CEM is rinsed off with DI water before the PEB. CEM generally improves resolution and process tolerance at the expense of higher exposure time.  
 
Unless otherwise noted, bakes are on hot plates. For recipes with CEM, the CEM is spun on after the first resist bake, exposure is then done, and the CEM is rinsed off with DI water before the PEB. CEM generally improves resolution and process tolerance at the expense of higher exposure time.  
  
'''NOTE''': The bolded exposure times were found by multiplying the exposure times from the GCA 6300 system by 0.30. They should be sued as a starting point. You will need to do an exposure array to get precise times for the Autostep system. In general, the resolution achievable is ~ 100 nm smaller for the Autostep200 system.
+
'''NOTE''': The bolded exposure times were found by multiplying the exposure times from the GCA 6300 system by 0.30. They should be sued as a starting point. You will need to do an exposure array to get precise times for the Autostep system. In general, the resolution achievable is ~ 100 nm smaller for the Autostep200 system.  
{| border="1" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" class="wikitable"
+
 
|-bgcolor="#D0E7FF"
+
{| class="wikitable" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" border="1"
!width=100|Resist
+
|- bgcolor="#D0E7FF"
!width=100|Spin Cond.
+
! width="100" |Resist
!width=75|Bake
+
! width="100" |Spin Cond.
!width=75|Thickness
+
! width="75" |Bake
!width=125|Exposure Time
+
! width="75" |Thickness
!width=100|Focus Offset
+
! width="125" |Exposure Time
!width=75|PEB
+
! width="100" |Focus Offset
!width=100|Developer
+
! width="75" |PEB
!width=125|Developer Time
+
! width="100" |Developer
!width=300|Comments
+
! width="125" |Developer Time
 +
! width="300" |Comments
 
|-
 
|-
|SPR955CM-0.9
+
|[[Media:SPR955-Positive-Resist-Datasheet.pdf|SPR955CM-0.9]]
 
|3 krpm/30”
 
|3 krpm/30”
 
|95°C/90”
 
|95°C/90”
Line 208: Line 244:
 
|AZ300MIF
 
|AZ300MIF
 
|60”
 
|60”
|align="left"|
+
| align="left" |
 
*0.5um dense lines
 
*0.5um dense lines
 
*{{fl|SPR955-0.9-AS200-stepperrecipe.pdf|See SPR955CM AS200 data file}}
 
*{{fl|SPR955-0.9-AS200-stepperrecipe.pdf|See SPR955CM AS200 data file}}
 +
 
|-
 
|-
|SPR955CM-0.9
+
|[[Media:SPR955-Positive-Resist-Datasheet.pdf|SPR955CM-0.9]]
 
|3 krpm/30”
 
|3 krpm/30”
 
|95°C/90”
 
|95°C/90”
Line 221: Line 258:
 
|AZ300MIF
 
|AZ300MIF
 
|60”
 
|60”
|align="left"|
+
| align="left" |
 
*0.5um holes
 
*0.5um holes
 +
 
|-
 
|-
|SPR955CM-1.8
+
|[[Media:SPR955-Positive-Resist-Datasheet.pdf|SPR955CM-1.8]]
 
|4 krpm/30”
 
|4 krpm/30”
 
|95°C/90”
 
|95°C/90”
Line 233: Line 271:
 
|AZ300MIF
 
|AZ300MIF
 
|60”
 
|60”
|align="left"|
+
| align="left" |
 
*{{fl|SPR955-1.8-AS200-stepperrecipe.pdf|See SPR955-1.8 AS200 data file}}
 
*{{fl|SPR955-1.8-AS200-stepperrecipe.pdf|See SPR955-1.8 AS200 data file}}
 +
 
|-
 
|-
 
|SPR950-0.8
 
|SPR950-0.8
Line 245: Line 284:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
 
|-
 
|-
|SPR220-3.0
+
|[[Media:SPR220-Positive-Resist-Datasheet.pdf|SPR220-3.0]]
 
|2.5 krpm/30”
 
|2.5 krpm/30”
 
|115°C/90”
 
|115°C/90”
Line 256: Line 295:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|<strike>
+
| align="left" |
 
*0.5 um isolated lines
 
*0.5 um isolated lines
*{{fl|SPR-220-3.0_OptimizationNew.pdf|See SPR220-3 Data File}}</strike>
+
 
 
|-
 
|-
|SPR220-7.0
+
|[[Media:SPR220-Positive-Resist-Datasheet.pdf|SPR220-7.0]]
 
|3.5 krpm/45”
 
|3.5 krpm/45”
 
|115°C/120”
 
|115°C/120”
Line 266: Line 305:
 
|'''1.35"'''
 
|'''1.35"'''
 
|0
 
|0
|*50°C/60”<br>
+
|*50°C/60”<br>  
115°C/90”
+
115°C/90”  
 +
 
 
|AZ300MIF
 
|AZ300MIF
 
|120"
 
|120"
|align="left"|<strike>
+
| align="left" |
*1.0 um isolated lines; 1.25 um isolated spaces
+
*1.0 um isolated lines; 1.25 um isolated spaces  
*&#42;Let sample sit in air for 20 minutes before PEB, step to 50°C for 60” first, then 115°C
+
**Let sample sit in air for 20 minutes before PEB, step to 50°C for 60” first, then 115°C
*{{fl|SPR-220-7.0stepperrecipe.pdf|See SPR220-7 Data File}}</strike>
+
 
 
|-
 
|-
 +
|[[Media:AXP4000pb-Datasheet.pdf|AZ4210]]
 +
|step1:500rpm/5", step2:4krpm/45”
 +
|95°C/60"
 +
|~ 2.1 um
 +
|'''0.75"'''
 +
|0
 +
|
 +
 +
|AZ400K:DI=1:4
 +
|60"
 +
| align="left" |
 +
*2.0 um dense holes
 +
 
|}
 
|}
  
==Negative Resist (AutoStep 200)== <!--Note that if this heading is changed, the recipe links on the Lithography page must be changed-->
+
==Negative Resist (AutoStep 200)== <!--Note that if this heading is changed, the recipe links on the Lithography page must be changed-->  
Unless otherwise noted, bakes are on hot plate. All flood exposures are done in broadband light using any contact aligner. Also, because the tone is negative, a shorter first exposure time will result in more undercut, which is desirable for single-layer lift-off processes. Under these conditions more develop time will also give more undercut.
+
Unless otherwise noted, bakes are on hot plate. All flood exposures are done in broadband light using any contact aligner. Also, because the tone is negative, a shorter first exposure time will result in more undercut, which is desirable for single-layer lift-off processes. Under these conditions more develop time will also give more undercut.  
  
'''NOTE''': The bolded exposure times were found by multiplying the exposure times from the GCA 6300 system by 0.30. They should be sued as a starting point. You will need to do an exposure array to get precise times for the Autostep system. In general, the resolution achievable is ~ 100 nm smaller for the Autostep200 system.
+
'''NOTE''': The bolded exposure times were found by multiplying the exposure times from the GCA 6300 system by 0.30. They should be sued as a starting point. You will need to do an exposure array to get precise times for the Autostep system. In general, the resolution achievable is ~ 100 nm smaller for the Autostep200 system.  
{| border="1" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" class="wikitable"
+
 
|-bgcolor="#D0E7FF"
+
{| class="wikitable" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" border="1"
!width=100|Resist
+
|- bgcolor="#D0E7FF"
!width=100|Spin Cond.
+
! width="100" |Resist
!width=75|Bake
+
! width="100" |Spin Cond.
!width=75|Thickness
+
! width="75" |Bake
!width=125|Exposure Time
+
! width="75" |Thickness
!width=100|Focus Offset
+
! width="125" |Exposure Time
!width=75|PEB
+
! width="100" |Focus Offset
!width=75|Flood
+
! width="75" |PEB
!width=100|Developer
+
! width="75" |Flood
!width=125|Developer Time
+
! width="100" |Developer
!width=300|Comments
+
! width="125" |Developer Time
 +
! width="300" |Comments
 
|-
 
|-
|nLOF5510
+
|[[Media:AZnLOF5510-Negative-Resist-Datasheet.pdf|nLOF5510]]
 
|3 krpm/30”
 
|3 krpm/30”
 
|90°C/60”
 
|90°C/60”
Line 305: Line 359:
 
|AZ300MIF
 
|AZ300MIF
 
|60”
 
|60”
|align="left"|
+
| align="left" |
 
*0.4 um lines dense good
 
*0.4 um lines dense good
 
*Use heated 1165 stripper for removal or lift-off
 
*Use heated 1165 stripper for removal or lift-off
 
*{{fl|nLOF5510-AS200-stepperrecipe.pdf|See nLOF5510 As200 data file}}
 
*{{fl|nLOF5510-AS200-stepperrecipe.pdf|See nLOF5510 As200 data file}}
 +
 
|-
 
|-
|AZ5214
+
|[[Media:AZ5214-Negative-Resist-Datasheet.pdf|AZ5214]]
 
|6 krpm/30”
 
|6 krpm/30”
 
|95°C/60”
 
|95°C/60”
Line 320: Line 375:
 
|AZ300MIF
 
|AZ300MIF
 
|60"
 
|60"
|align="left"|
+
| align="left" |
*<strike>0.5 um res. possible, but resist is sensitive to environment</strike>
+
*0.7 um res. possible
 +
 
 
|-
 
|-
|nLOF2020
+
|[[Media:AZnLOF2020-Negative-Resist-Datasheet.pdf|nLOF2020]]
 
|4 krpm/30”
 
|4 krpm/30”
 
|110°C/60”
 
|110°C/60”
Line 333: Line 389:
 
|AZ300MIF
 
|AZ300MIF
 
|90"
 
|90"
|align="left"|
+
| align="left" |
*<strike> ~ .85 um line opening/lift-off good. Isolated mesas can be smaller.
+
*~ .85 um line opening/lift-off good. Isolated mesas can be smaller.
 
*Use heated 1165 stripper for removal or lift-off Sensetive to PEB temp.
 
*Use heated 1165 stripper for removal or lift-off Sensetive to PEB temp.
*{{fl|nLOF2020stepperrecipe.pdf|See nLOF2020 Data File}}</strike>
 
 
|-
 
|-
 +
 +
|[[Media:NR9-1000PY-revA.pdf|NR9-1000PY]]
 +
|3 krpm/30”
 +
|135°C/180” lid down
 +
|~ 1.2 um
 +
|'''0.92”'''
 +
|0
 +
|115°C/120” lid down
 +
|0
 +
|AZ300MIF
 +
|20"
 +
| align="left" |
 +
*~ .55 um line opening/lift-off good.
 +
*Use heated 1165 stripper for removal 8Hrs min.
 +
*{{fl|NR9-1000PY-AS200-stepperrecipe.pdf|See NR9-1000PY As200 data file}}
 +
|}
 +
 +
=[[Stepper 3 (ASML DUV)]]=
 +
 +
==Anti-Reflective Coatings==
 +
Bottom Anti-reflective coatings (aka. BARC or AR Coating) are, in general, used for the ASML stepper. LOL2000 and PMGI can also be used as under layers.
 +
 +
==='''[https://wiki.nanotech.ucsb.edu/wiki/images/0/07/DUV42P-Anti-Reflective-Coating.pdf DUV-42P-6]'''===
 +
''(replacement for AR2)''
 +
 +
*spin coat at 2500rpm for optimal anti-reflective properties (~60nm).
 +
**Mistake: this was previously written as 3500rpm.
 +
*Bake at 220°C for 60s on a hotplate.
 +
*This AR coating is removed via oxygen plasma.
 +
*This ARC can be etched on [https://wiki.nanotech.ucsb.edu/w/index.php?title=ICP_Etching_Recipes#Photoresist_and_ARC_Etching_.28Panasonic_1.29 ICP#1], [https://wiki.nanotech.ucsb.edu/w/index.php?title=ICP_Etching_Recipes#Photoresist_and_ARC_etching_.28Panasonic_2.29 ICP#2], [https://wiki.nanotech.ucsb.edu/w/index.php?title=RIE_Etching_Recipes#Photoresist_and_ARC_.28RIE_5.29 RIE#5], [https://wiki.nanotech.ucsb.edu/wiki/ICP_Etching_Recipes#Photoresist_.26_ARC_.28Fluorine_ICP_Etcher.29 FL-ICP] or even [[Ashers (Technics PEII)|Technics PEii ashers]].
 +
*Datasheet: '''[https://wiki.nanotech.ucsb.edu/wiki/images/0/07/DUV42P-Anti-Reflective-Coating.pdf DUV-42P-6]'''
 +
 +
==='''[https://wiki.nanotech.ucsb.edu/wiki/images/a/af/DS-K101-304-Anti-Reflective-Coating.pdf DS-K101-304]'''===
 +
 +
*spin at 5000rpm and bake at 185C for 60s.
 +
**~20nm thickness
 +
*This AR coating develops away and undercuts in AZ300MIF.
 +
**For isolated lines, this can cause them to lift-off by undercutting the resist.
 +
*Increase bake temperature to reduce undercut rate.
 +
**[[DS-K101-304 Bake Temp. versus Develop Rate]] - Click for experimental data
 +
**Can be used similarly to DUV42P (dry etch removal) by baking at 220°C.
 +
*Datasheet: '''[https://wiki.nanotech.ucsb.edu/wiki/images/a/af/DS-K101-304-Anti-Reflective-Coating.pdf DS-K101-304]'''
 +
 +
==Positive Resist (ASML DUV)==
 +
Please see section above for anti-reflection coatings, which are usually used with the DUV Stepper.
 +
 +
{| class="wikitable" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" border="1"
 +
|- bgcolor="#D0E7FF"
 +
! width="100" |Resist
 +
! width="100" |Spin Cond.
 +
! width="75" |Bake
 +
! width="75" |Thickness
 +
! width="125" |Exposure Dose(mj)
 +
! width="100" |Focus Offset
 +
! width="75" |PEB
 +
! width="100" |Developer
 +
! width="125" |Developer Time
 +
! width="300" |Comments
 +
|-
 +
|UV6-0.7 <br> (replaced by [[Media:UV6-Positive-Resist-Datasheet.pdf|UV6-0.8]])
 +
 +
|3.5 krpm/30”
 +
|135°C/60”
 +
|630nm
 +
|17
 +
| -0.2
 +
|135°C/90”
 +
|AZ300MIF
 +
|45”
 +
| align="left" |
 +
*200nm dense line/space
 +
*NA 0.57, Sigma 0.75
 +
*Eo ~ 5.5mj
 +
*UV6-0.7 was discontinued, we now stock UV6-0.8
 +
 +
|-
 +
|[[Media:UV210-Positive-Resist-Datasheet.pdf|UV210-0.3]]
 +
|5.0 krpm/30”
 +
|135°C/60”
 +
|230nm
 +
|20
 +
| -0.1
 +
|135°C/90”
 +
|AZ300MIF
 +
|45"
 +
| align="left" |
 +
*150nm dense line/space
 +
*'''Annular Illumination'''
 +
*NA 0.63, Sigma_o 0.8, Sigma_i 0.5
 +
 +
|-
 +
|[[Media:UV210-Positive-Resist-Datasheet.pdf|UV210-0.3]]
 +
|3.0 krpm/30”
 +
|135°C/90”
 +
|260nm
 +
|85
 +
| -0.2
 +
|135°C/90”
 +
|AZ300MIF
 +
|80”
 +
| align="left" |
 +
*170nm isolated holes
 +
*'''Annular Illumination'''
 +
*NA 0.63, Sigma_o 0.8, Sigma_i 0.5
 +
 +
|}
 +
 +
==Negative Resist (ASML DUV)==
 +
Please see section above for anti-reflection coatings, which are usually used with the DUV Stepper.
 +
 +
{| class="wikitable" style="border: 1px solid #D0E7FF; background-color:#ffffff; text-align:center;" border="1"
 +
|- bgcolor="#D0E7FF"
 +
! width="100" |Resist
 +
! width="100" |Spin Cond.
 +
! width="75" |Bake
 +
! width="75" |Thickness
 +
! width="125" |Exposure Dose (mj)
 +
! width="100" |Focus Offset
 +
! width="75" |PEB
 +
! width="75" |Flood
 +
! width="100" |Developer
 +
! width="125" |Developer Time
 +
! width="300" |Comments
 
|-
 
|-
 +
|[[Media:UVN-30 - Negative-Resist-Datasheet - Apr 2004.pdf|UVN30-0.8]]
 +
|3.5 krpm/30”
 +
|110°C/60”
 +
|~550nm
 +
|27
 +
| +0.15
 +
|105°C/60”
 +
|Not Used
 +
|AZ300MIF
 +
|55-60 sec
 +
| align="left" |
 +
*Replaced UVN2300, not identical
 +
 
|}
 
|}
  
=[[Stepper 3 (ASML DUV)]]=
+
==Other Lithography Processes (ASML DUV)==
 +
 
 +
*[[ASML DUV: Edge Bead Removal via Photolithography|DUV Photolithographic Edge Bead Removal]]
 +
*[[Lift-Off with DUV Imaging + PMGI Underlayer|DUV Lift-Off Process with PMGI Underlayer]]

Latest revision as of 17:07, 9 September 2021

Back to Lithography Recipes.

Below is a listing of stepper lithography recipes. Stepper 1 and Stepper 2 are i-line systems with good piece handling capabilities.  Stepper 3 is a DUV (248nm) system primarily used for full 100mm wafers.  DUV resists do not work for i-line and i-line resists do not work for DUV.  Based on your sample reflectivity, absorption (or whether or not you use an ARC layer), and surface topography, the exposure time / focus offset parameters may vary.

This listing is a guideline to get you started. For critical lithography steps, you should run your own exposure and/or focus array to determine the proper parameters.

The recipes are tabulated to give you the values of the key parameters you will need to establish your recipe. Underlayers such as LOL2000 or PMGI can be used on the stepper systems.  See the underlayer datasheets for details.   Post develop bakes (not listed) are used to make the resist more etch resistant and depend on subsequent processes. Care should be taken with post development bakes as resist reflow can occur. Unless otherwise noted, all exposures are done on flat, silicon wafers.

Parameters are indicated in separate tables for each stepper system.

Stepper 1 (GCA 6300)

Multiply the GCA 6300 exposure times by 0.30 to get a starting exposure time for the GCA Autostep200 system.

Positive Resist (GCA 6300)

Unless otherwise noted, bakes are on hot plates. For recipes with CEM, the CEM is spun on after the first resist bake, exposure is then done, and the CEM is rinsed off with DI water before the PEB. CEM generally improves resolution and process tolerance at the expense of higher exposure time.

Resist Spin Cond. Bake Thickness Exposure Time Focus Offset PEB Developer Developer Time Comments
SPR955CM0.9 3 krpm/30” 95°C/60” ~ 0.9 um 1.2” 0 110°C/60” AZ300MIF 60"
SPR955CM-0.9 3 krpm/30” 95°C/60” ~ 0.9 um 3.0” 4 110°C/60” AZ300MIF 60"
SPR955CM-0.9

CEM365iS

3 krpm/30”

5 krpm/30”

95°C/90” ~ 0.9 um 2.2” -10 110°C/60” AZ300MIF 60"
SPR950-0.8 4 krpm/30” 95°C/60” ~ 0.8 um 1.0” 0 105°C/60” AZ300MIF 60"
SPR955CM-1.8 4 krpm/30” 90°C/90” ~ 1.8 um 2.3” 0 110°C/90” AZ300MIF 60"
SPR955CM-1.8 4 krpm/30” 90°C/90” ~ 1.8 um 1.7” -5 110°C/90” AZ300MIF 60"
SPR220-3.0 2.5 krpm/30” 115°C/90” ~ 2.7 um 2.4” 10 115°C/90” AZ300MIF 60"
SPR220-7.0 3.5 krpm/45” 115°C/120” ~ 7.0 um 4.5” 0 *50°C/60”

115°C/90”

AZ300MIF 120"
  • 1.0 um isolated lines; 1.25 um isolated spaces
    • Let sample sit in air for 20 minutes before PEB, step to 50°C for 60” first, then 115°C
  • See SPR220-7 Data File

Negative Resist (GCA 6300)

Unless otherwise noted, bakes are on hot plate. All flood exposures are done in broadband light using any contact aligner. Also, because the tone is negative, a shorter first exposure time will result in more undercut, which is desirable for single-layer lift-off processes. Under these conditions more develop time will also give more undercut.

Resist Spin Cond. Bake Thickness Exposure Time Focus Offset PEB Flood Developer Developer Time Comments
AZ5214 6 krpm/30” 95°C/60” ~ 1.0 um 0.2” 0 110°C/60” 60" AZ300MIF 60"
  • 0.7 um res. possible 
nLOF5510 3 krpm/30” 90°C/60” ~ 0.93 um 0.74” -6 110°C/60” 0 AZ300MIF 60"
  • 0.5 um line openings good dense or isolated
  • Use heated 1165 stripper for removal or lift-off
  • See nLOF5510 data file
nLOF2020 4 krpm/30” 110°C/60” ~ 2 um 0.55” -6 110°C/60” 0 AZ300MIF 90"
  • ~ .85 um line opening/lift-off good. Isolated mesas can be smaller.
  • Use heated 1165 stripper for removal or lift-off Sensetive to PEB temp.
  • See nLOF2020 Data File

Stepper 2 (AutoStep 200)

Positive Resist (AutoStep 200)

Unless otherwise noted, bakes are on hot plates. For recipes with CEM, the CEM is spun on after the first resist bake, exposure is then done, and the CEM is rinsed off with DI water before the PEB. CEM generally improves resolution and process tolerance at the expense of higher exposure time.

NOTE: The bolded exposure times were found by multiplying the exposure times from the GCA 6300 system by 0.30. They should be sued as a starting point. You will need to do an exposure array to get precise times for the Autostep system. In general, the resolution achievable is ~ 100 nm smaller for the Autostep200 system.

Resist Spin Cond. Bake Thickness Exposure Time Focus Offset PEB Developer Developer Time Comments
SPR955CM-0.9 3 krpm/30” 95°C/90” ~ 0.9 um 0.35” 0 110°C/90” AZ300MIF 60”
SPR955CM-0.9 3 krpm/30” 95°C/90” ~ 0.9 um 0.8” 0 110°C/90” AZ300MIF 60”
  • 0.5um holes
SPR955CM-1.8 4 krpm/30” 95°C/90” ~ 1.8 um 0.4” -1 110°C/90” AZ300MIF 60”
SPR950-0.8 4 krpm/30” 95°C/60” ~ 0.8 um 0.30” 0 105°C/60” AZ300MIF 60"
SPR220-3.0 2.5 krpm/30” 115°C/90” ~ 2.7 um 0.72” 10 115°C/90” AZ300MIF 60"
  • 0.5 um isolated lines
SPR220-7.0 3.5 krpm/45” 115°C/120” ~ 7.0 um 1.35" 0 *50°C/60”

115°C/90”

AZ300MIF 120"
  • 1.0 um isolated lines; 1.25 um isolated spaces
    • Let sample sit in air for 20 minutes before PEB, step to 50°C for 60” first, then 115°C
AZ4210 step1:500rpm/5", step2:4krpm/45” 95°C/60" ~ 2.1 um 0.75" 0 AZ400K:DI=1:4 60"
  • 2.0 um dense holes

Negative Resist (AutoStep 200)

Unless otherwise noted, bakes are on hot plate. All flood exposures are done in broadband light using any contact aligner. Also, because the tone is negative, a shorter first exposure time will result in more undercut, which is desirable for single-layer lift-off processes. Under these conditions more develop time will also give more undercut.

NOTE: The bolded exposure times were found by multiplying the exposure times from the GCA 6300 system by 0.30. They should be sued as a starting point. You will need to do an exposure array to get precise times for the Autostep system. In general, the resolution achievable is ~ 100 nm smaller for the Autostep200 system.

Resist Spin Cond. Bake Thickness Exposure Time Focus Offset PEB Flood Developer Developer Time Comments
nLOF5510 3 krpm/30” 90°C/60” ~ 0.93 um .25” -1 110°C/60” 0 AZ300MIF 60”
AZ5214 6 krpm/30” 95°C/60” ~ 1.0 um 0.06” 0 110°C/60” 60" AZ300MIF 60"
  • 0.7 um res. possible
nLOF2020 4 krpm/30” 110°C/60” ~ 2 um 0.17” -6 110°C/60” 0 AZ300MIF 90"
  • ~ .85 um line opening/lift-off good. Isolated mesas can be smaller.
  • Use heated 1165 stripper for removal or lift-off Sensetive to PEB temp.
NR9-1000PY 3 krpm/30” 135°C/180” lid down ~ 1.2 um 0.92” 0 115°C/120” lid down 0 AZ300MIF 20"

Stepper 3 (ASML DUV)

Anti-Reflective Coatings

Bottom Anti-reflective coatings (aka. BARC or AR Coating) are, in general, used for the ASML stepper. LOL2000 and PMGI can also be used as under layers.

DUV-42P-6

(replacement for AR2)

  • spin coat at 2500rpm for optimal anti-reflective properties (~60nm).
    • Mistake: this was previously written as 3500rpm.
  • Bake at 220°C for 60s on a hotplate.
  • This AR coating is removed via oxygen plasma.
  • This ARC can be etched on ICP#1, ICP#2, RIE#5, FL-ICP or even Technics PEii ashers.
  • Datasheet: DUV-42P-6

DS-K101-304

  • spin at 5000rpm and bake at 185C for 60s.
    • ~20nm thickness
  • This AR coating develops away and undercuts in AZ300MIF.
    • For isolated lines, this can cause them to lift-off by undercutting the resist.
  • Increase bake temperature to reduce undercut rate.
  • Datasheet: DS-K101-304

Positive Resist (ASML DUV)

Please see section above for anti-reflection coatings, which are usually used with the DUV Stepper.

Resist Spin Cond. Bake Thickness Exposure Dose(mj) Focus Offset PEB Developer Developer Time Comments
UV6-0.7
(replaced by UV6-0.8)
3.5 krpm/30” 135°C/60” 630nm 17 -0.2 135°C/90” AZ300MIF 45”
  • 200nm dense line/space
  • NA 0.57, Sigma 0.75
  • Eo ~ 5.5mj
  • UV6-0.7 was discontinued, we now stock UV6-0.8
UV210-0.3 5.0 krpm/30” 135°C/60” 230nm 20 -0.1 135°C/90” AZ300MIF 45"
  • 150nm dense line/space
  • Annular Illumination
  • NA 0.63, Sigma_o 0.8, Sigma_i 0.5
UV210-0.3 3.0 krpm/30” 135°C/90” 260nm 85 -0.2 135°C/90” AZ300MIF 80”
  • 170nm isolated holes
  • Annular Illumination
  • NA 0.63, Sigma_o 0.8, Sigma_i 0.5

Negative Resist (ASML DUV)

Please see section above for anti-reflection coatings, which are usually used with the DUV Stepper.

Resist Spin Cond. Bake Thickness Exposure Dose (mj) Focus Offset PEB Flood Developer Developer Time Comments
UVN30-0.8 3.5 krpm/30” 110°C/60” ~550nm 27 +0.15 105°C/60” Not Used AZ300MIF 55-60 sec
  • Replaced UVN2300, not identical

Other Lithography Processes (ASML DUV)