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SSI Process Backup using the SVG. Lilah Cook MCEE 550 Fall 2013 Factory Improvement Project Dr. Lynn Fuller. Revised: 4-8-14. SSI & SVG Coat. SSI Coat Experiment. SVG Coat Experiment. 2 Wafers coated using SVG track with Oir630 resist
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SSI Process Backup using the SVG Lilah Cook MCEE 550 Fall 2013 Factory Improvement Project Dr. Lynn Fuller Revised: 4-8-14
SSI & SVG Coat SSI Coat Experiment SVG Coat Experiment 2 Wafers coated using SVG track with Oir630 resist Created program 6 on SVG track 1b to emulate the spin steps from the SSI Check oven 1 temp ~140 Change oven 2 temp ~90 Remove lid on cover for manual dispense Select program 1 on track 1a for the standard prime Select program 6 on track 1b Start 1a then 1b Manually dispense resist when wafers reach spin coater • 2 Wafers coated using Coat.rcp with Oir620 resist • Coat.rcpbreakdoawn • Acceleration: 15 krpm • Oven 1 temp: 140 (60s) • Oven 2 temp: 90 (60s) • SpinSteps • 0 800 rpm (5s) • 800 3400 rpm (5s) • 3400 2000 rpm (25s) • Automatic dispense
Coat Comparison Spectramap 49 Point Resist Measurements: SVG Wafer 1: 10553 A Std 0.36% Wafer 2: 10578 A Std 1.00% SSI Wafer 1: 10354 A Std 0.92% Wafer 2: 10288 A Std 0.81%
Pattern and Develop • Lightly scribed the back of the SVG wafers and placed all four wafers into the ASML for level 1 and JG n well patterning • SSI Develop • Wafers went through the develop.rcp recipe with no problem • SVG Develop • SVG track has NO post exposure bake oven so replication would be impossible • Created Program 6 on track 2 which doubles the standard 60 second develop found in the SSI track • Needed to be broken up into two steps as max input in SVG in 99 seconds • Wafers developed with 60 seconds develop ad a 15 second rinse • Waiting for approval to add program steps to manual
Conclusions • The above optical images shows that the nwell pattern has fully been developed • SVG tracks can be used to emulate the SSI track when patterning large features • Track 1a: Program 1 (standard Prime) • Track 1b: Program 6 (SSI Coat replica) • Track 2 : Program 6 (Oir620 Develop) • Working with SMFL staff to add program descriptions and recipes to the SVG manual