cleaning
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| cleaning [2013/11/17 06:53] – mcmaster | cleaning [2025/08/04 21:23] (current) – external edit 127.0.0.1 | ||
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| Shame on you if you picked up a die with your bare hands but things do happen. | Shame on you if you picked up a die with your bare hands but things do happen. | ||
| - | ===== Polymide passivation ===== | ||
| - | Can be removed with strong acids (eg RFNA). | + | ===== Polyimide passivation ===== |
| - | + | General reccomendations: | |
| - | + | * Oxygen plasma is probably best if you have access to it | |
| - | "find a polyimide layer that was not entirely removed by HNO3 but which can be dissolved | + | * If you can deal with safety issues, |
| + | * Fuming nitric aicd works but takes a while. This can potentially cause chip damage but shouldn' | ||
| + | * Piranha eats it quickly but it eats other metals nearly as quickly so its probably best avoided | ||
| ==== Ethylendiamine ==== | ==== Ethylendiamine ==== | ||
| - | From [Beck 23] | + | "find a polyimide layer that was not entirely removed by HNO3 but which can be dissolved with ethylendiamine" |
| + | |||
| + | Rest from [Beck 23] | ||
| Procedure: | Procedure: | ||
| Line 185: | Line 188: | ||
| ==== Ethylendiamine + hydrazine monohydrate ==== | ==== Ethylendiamine + hydrazine monohydrate ==== | ||
| + | |||
| + | " | ||
| From [Beck 23]. Use this if plain ethylendiamine does not work. Unclear if it has a higher corrosion potential, but heed the safety warning | From [Beck 23]. Use this if plain ethylendiamine does not work. Unclear if it has a higher corrosion potential, but heed the safety warning | ||
cleaning.1384671231.txt.gz · Last modified: 2013/11/17 06:53 by mcmaster