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cleaning [2013/11/17 02:15]
mcmaster
cleaning [2013/11/17 02:18] (current)
mcmaster
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 Shame on you if you picked up a die with your bare hands but things do happen. ​ Acetone does not clean off fingerprints very well but soapy water does.  The above picture was taken after putting a fingerprint on a slide and sonicating in acetone for a few minutes. ​ It has little to no effect. ​ Fingerprint oils do not respond to polarized light (ie will black out). Shame on you if you picked up a die with your bare hands but things do happen. ​ Acetone does not clean off fingerprints very well but soapy water does.  The above picture was taken after putting a fingerprint on a slide and sonicating in acetone for a few minutes. ​ It has little to no effect. ​ Fingerprint oils do not respond to polarized light (ie will black out).
 +
  
 ===== Polymide passivation ===== ===== Polymide passivation =====
  
-Can be removed with strong acids (eg RFNA). ​ Stilldoes not come off easily so other methods should ​be researched+General reccomendations:​ 
- +  * Oxygen plasma is probably best if you have access to it 
 +  * If you can deal with safety issuesethylendiamine may be next best 
 +  * Fuming nitric aicd works but takes a while This can potentially cause chip damage but shouldn'​t hurt Cu/Al if you keep the concentration high 
 +  * Piranha eats it quickly but it eats other metals nearly as quickly so its probably best avoided
  
   
 
cleaning.txt · Last modified: 2013/11/17 02:18 by mcmaster
 
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