Specific Process Knowledge/Lithography/PMMA

Resist	Polarity	Manufacturer	Comments	Technical reports	Spinner	Developer	Rinse	Remover	Process flows (in docx-format)
CSAR	Positive	AllResist	Standard positive resist, very similar to ZEP520.	Allresist_CSAR62_English.pdf‎,, CSAR_62_Abstract_Allresist.pdf‎	Manual Spinner 1 (Laurell), Spin Coater Labspin	XAR-600-546, XAR-600-548, N50, MIBK:IPA	IPA	AR-600-71, 1165 Remover	Process Flow CSAR.docx‎

Spin Curves

The thickness is measured on VASE Ellipsometer using a simple Cauchy model for a transparent polymer on Si. The measurements are performed at one incidence angle (70 degrees) only. 9 points on each 4" wafer has been measured; the standard deviation thus representing the homogeinity of the film on the 4" wafers.

Please be aware that I have experienced a somewhat large thickness deviation (5-8 %) depending on the amount of resist applied to the wafer before spin coating.

Dosepattern has been e-beam exposured and SEM inspected on those wafers marked by silver gray.

AllResist AR-P 6200 (> 2ml per 4" wafer) spinning on Spin Coater: Manual LabSpin A-5, TIGRE, 09-04-2014. Softbake 5 min @ 150 degC.
Spin Speed [rpm]	Acceleration [1/s2]	Thickness [nm]	St Dev
2000	4000	225.98	0.97
3000	4000	194.00	0.6
4000	4000	169.57	0.32
5000	4000	151.47	0.26
6000	4000	142.38	0.41
7000	4000	126.59	0.36

AllResist CSAR (< 2ml per 4" wafer) on Spin Coater: Manual LabSpin A-5, TIGRE, 16-06-2014. Softbake 2 min @ 150 degC.
Spin Speed [rpm]	Acceleration [1/s2]	Thickness [nm]	St Dev
3000	4000	201.61	1.20
4000	4000	173.89	0.64
5000	4000	155.91	0.65

AllResist CSAR 1:1 in anisole (< 2ml per 4" wafer), Spin Coater: Manual LabSpin A-5, TIGRE, 16-06-2014. Softbake 2 min @ 150 degC.
Spin Speed [rpm]	Acceleration [1/s2]	Thickness [nm]	St Dev
2000	4000	83.48	0.49
3000	4000	67.12	0.41
4000	4000	58.64	0.44
5000	4000	53.13	0.39
6000	4000	48.76	0.38