Results testing AutoStain machine
Research topics:
Effect of light vs no light
Optimal staining times
Effects on solution changes
Effects on removing metals / barriers
Effects of over-staining
Which chips are harder to stain correctly
Effects of HF concentration / etchent (ex whink vs 20% HF)
TODO: standardize fiber / chip positioning
Baseline Sharp SM4 as these are relatively plentiful and are known to be very easy to stain (ie wide margin of error for experiments)
Images | Chip | Sample | Process | Notes |
| Nintendo 6102
(Sharp SM4) | 2020-08-11 S1 | Etch RG 2 hour (no changes)
~80F | TLDR: test was mostly invalidated due to preparation error
* Staining visible
* Crystals present
Tried to use less grease to hold sample. Resulted in sample flying off during final wash.
I didn't have time to fish it out and it stayed in the drain tube for some hours.
When I fished it out waste acid had etched it, probably resulting in the half eaten ROM
Corrections:
* Use more grease
* Position sample holder to slightly block drain
* Budget cleanup time for important chips |
| Nintendo 6102
(Sharp SM4) | 2020-08-11 S1 | Stain 60 sec
Light: full single fiber
~80F | Overstained, possibly due to error in step 1 |
| Nintendo 6102
(Sharp SM4) | 2020-08-11 S2 | Etch RG 1 hour (no changes)
~80F | * No staining visible
* Poly stringers everywhere
* Metal present
* No crystals |