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Specific Process Knowledge/Lithography/UVExposure: Difference between revisions

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===Process information===
===Process information===
The KS Aligner has an i-line notch filter installed. This results in an exposure light peak around 365nm with a FWHM of 7nm. Dependent on the spectral sensitivity of the resist, the optimal dose may be increased compared to broadband exposure on the Aligner-6inch. Unless otherwise stated, the exposure doses given here are for standard silicon wafers.
The KS Aligner has an i-line notch filter installed. This results in an exposure light peak around 365nm with a FWHM of 7nm. Dependent on the spectral sensitivity of the resist, the optimal dose may be increased compared to broadband exposure on the Aligner-6inch.


*[[Specific Process Knowledge/Lithography/UVExposure/UVExposure dose|Information on UV exposure dose]]
*[[Specific Process Knowledge/Lithography/UVExposure/UVExposure dose|Information on UV exposure dose]]
'''Positive tone resists:'''
'''AZ 5214E and AZ 4562'''
Compared to exposure on Aligner-6inch, the dose on KS-Aligner is doubled.
*1.5µm: 35-49 mJ/cm<sup>2</sup> corresponding to 5-7 seconds exposure at 7 mW/cm<sup>2</sup>.
*2.2µm: 56-70 mJ/cm<sup>2</sup> corresponding to 8-10 seconds exposure at 7 mW/cm<sup>2</sup>.
*4.2µm: ~140 mJ/cm<sup>2</sup> corresponding to ~20 seconds exposure at 7 mW/cm<sup>2</sup>.
*10µm: ~280 mJ/cm<sup>2</sup> corresponding to ~40 seconds exposure at 7 mW/cm<sup>2</sup>. Multiple exposure with 10s pauses is recommended.
'''AZ MiR 701''' ''Preliminary results''
Compared to exposure on Aligner-6inch, the dose on KS-Aligner is five-doubled.
*1.5µm: 157.5 mJ/cm<sup>2</sup> corresponding to 22.5 seconds exposure at 7 mW/cm<sup>2</sup>.
'''Negative tone resists'''
'''AZ 5214E image reversal'''
Compared to exposure on Aligner-6inch, the dose on KS-Aligner is doubled.
*1.5µm: 21 mJ/cm<sup>2</sup> corresponding to 3 seconds exposure at 7 mW/cm<sup>2</sup>.
*1.5µm resist on boron glass: around 7 sec (49 mJ/cm<sup>2</sup>) (supplied March 2013 by Morten Bo Lindholm Mikkelsen, DTU Nanotech).
*2.2µm: 24 mJ/cm<sup>2</sup> corresponding to 3.4 seconds exposure at 7 mW/cm<sup>2</sup>.
Flood exposure after reversal bake: 210 mJ/cm<sup>2</sup> corresponding to 30 seconds exposure at 7 mW/cm<sup>2</sup>.
'''AZ nLOF 20XX''' ''Preliminary results''
Compared to exposure on Aligner-6inch, the dose on KS-Aligner is the same.
*1.5µm: 42 mJ/cm<sup>2</sup> corresponding to 6 seconds exposure at 7 mW/cm<sup>2</sup>.
*2µm: 49 mJ/cm<sup>2</sup> corresponding to 7 seconds exposure at 7 mW/cm<sup>2</sup>.
*3µm: 56 mJ/cm<sup>2</sup> corresponding to 8 seconds exposure at 7 mW/cm<sup>2</sup>.
*4.3µm: 70 mJ/cm<sup>2</sup> corresponding to 10 seconds exposure at 7 mW/cm<sup>2</sup>.
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=== Equipment performance and process related parameters ===
{| border="2" cellspacing="0" cellpadding="2"
!style="background:silver; color:black;" align="center" width="60"|Purpose
|style="background:LightGrey; color:black"|
|style="background:WhiteSmoke; color:black" align="center" colspan="2"|
Alignment and UV exposure
|-
!style="background:silver; color:black" align="left" valign="center" rowspan="5"|Performance
|style="background:LightGrey; color:black"|Exposure mode
|style="background:WhiteSmoke; color:black" align="center" colspan="2"|
soft contact, hard contact, proximity, flood exposure
|-
| style="background:LightGrey; color:black"|Exposure light/filters
|style="background:WhiteSmoke; color:black" align="center" colspan="2"|
*365 nm (i-line), light intensity 7,0 mW/cm<sup>2</sup> in Constant Intansity (CI2) mode
*303 nm filters optional
|-
|style="background:LightGrey; color:black"|Minimum structure size
|style="background:WhiteSmoke; color:black" align="center" colspan="2"|
down to 1µm
|-
|style="background:LightGrey; color:black"|Mask size
|style="background:WhiteSmoke; color:black" align="center" colspan="2"|
*5x5inch
*7x7inch
|-
|style="background:LightGrey; color:black"|Alignment modes
|style="background:WhiteSmoke; color:black" align="center" colspan="2"|
*Top Side Alignment(TSA)
*Bottom Side Alignment(BSA)
|-
!style="background:silver; color:black" align="center" valign="center" rowspan="3"|Substrates
|style="background:LightGrey; color:black"|Substrate size
|style="background:WhiteSmoke; color:black" align="center" colspan="2"|
* 50 mm wafers
* 110 mm wafers
* 150 mm wafers
|-
| style="background:LightGrey; color:black"|Allowed materials
|style="background:WhiteSmoke; color:black" align="center" colspan="2"|
* All cleanroom materals
* III-V materials chuck optinal
|-
|style="background:LightGrey; color:black"|Batch
|style="background:WhiteSmoke; color:black" align="center" colspan="2"|
1
|-
|}


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