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equipment:storage [2018/12/16 22:59]
mcmaster
equipment:storage [2019/06/07 14:17]
mcmaster [Foams]
Line 149: Line 149:
 ===== Blue tape ===== ===== Blue tape =====
  
-Diced wafers are usually on blue tape.  Thin plastic films should stick easily to seal it up. +Diced wafers are usually on blue tape.  Thin plastic films should stick easily to seal it up. I've been cutting the edges off to make them non-sticky and putting them in standard wafer carriers.
- +
 ===== Vacuum pack ===== ===== Vacuum pack =====
  
Line 165: Line 163:
  
 ====== Foams ====== ====== Foams ======
 +
 +3/8" (10 mm) thick seems to work well for putting DIPs on both sides
  
 This section was added to try to learn why some black conductive foams degrade into powder and others degrade into a (mildly corrosive?) sticky mess This section was added to try to learn why some black conductive foams degrade into powder and others degrade into a (mildly corrosive?) sticky mess
Line 173: Line 173:
   * Insulative: surface resistance > 1 x 10 12 ohms/square   * Insulative: surface resistance > 1 x 10 12 ohms/square
   * Anti-static:​ inhibits triboelectric charging, "the buildup of an electric charge by the rubbing or contact with another material"​   * Anti-static:​ inhibits triboelectric charging, "the buildup of an electric charge by the rubbing or contact with another material"​
 +
 +
 +https://​www.zoro.com/​zoro-select-foam-sheet-36-l-36-w-38-pink-5gdc4/​i/​G1112921/​
 +  * Too low density to be useful
 +  * Open cell
 +  * Density: 1.4 lbs. cu. ft
 +  * Tensile Strength (PSI): 13
 +
 +https://​www.all-spec.com/​Catalog/​Static-Control/​ESD-Safe-Cushioning-Materials/​ESD-Safe-Foams/​750-2436
 +  * Advertises for chips
 +  * Closed cell
 +  * Density: 1.8 pcf (28.8 kg/m3)
 +  * Tensile Strength: 31 psi (215kPa)
 +
 +<​code>​
 +depends on whether you want your foam to turn to goo or powder. personally i prefer goo
 +14:57:57 powder is open cell foam, it works as an abrasive too
 +14:58:07 goo is closed cell foam, which is oddly slick
 +14:58:23 after 20 years the foams disintegrate
 +14:58:41 open cell foam turns into some sort of acid (acetic?) which will eat chip legs i think
 +14:58:45 i don't know about closed cell
 +14:58:56 i think closed cell disintegrates much slower but gets '​sticky'​
 +</​code>​
  
 ===== Density ===== ===== Density =====
 
equipment/storage.txt · Last modified: 2019/07/05 15:50 by mcmaster
 
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