Showing posts with label PoP. Show all posts
Showing posts with label PoP. Show all posts

Friday, February 25, 2011

Package-on-Package (PoP) Solder Paste

INDIUM: "A 400micron bump should therefore be fine even with a type 3 dipping paste, whereas a 200micron bump will need a type 5 paste.

I look forward to someone proving this wrong. The second (ii/) is helpful, because we can easily use it to test the theoretical mass of PoP dipping paste against what we actually find. Note that this is just simple geometry: it doesn't tell us how much paste is really needed to resolve issues such as the 60 - 90micron bowing we are hearing about from our customers even with the more rigid PoP packages currently available. I will be talking more about this at the"