Electronics Forum | Mon Sep 10 12:51:25 EDT 2001 | Carol Stirling
That's my Typo... couldn't figure out how to fix it. It should read SMT -boards with lots of SMT parts, including PBGA. I'll be more specific next time.... Thanks for the replies.. Carol
Electronics Forum | Tue Sep 18 09:47:36 EDT 2001 | jseagle
Have all the issuses been worked out of FormFlex? What makes FormFlex better than Grid-Lok? I am considering purchasing a DEK ELA printer with the option. James
Electronics Forum | Thu Sep 27 13:11:07 EDT 2001 | Nankar
what factors should be monitored and controlled during assembly of components on PCBs and their storage? Temperature and humidity seem obvious. Should one also watch out for any particular gases that may cause oxidation? Or dust?
Electronics Forum | Tue Oct 02 07:23:37 EDT 2001 | cath
Has anyone caried out a DPM analysis on these components. I would be interested to know the defect rates and other assoc. placement issues as we have never placed them before. Thanks, cath
Electronics Forum | Wed Oct 03 21:28:38 EDT 2001 | davef
A firm grasp on the sublime. Mike points-out a good reason to describe Claude's problem as "open connections" or "open solder connections"? [Ahhh geez, wut a spoil spurt]
Electronics Forum | Thu Oct 04 13:04:52 EDT 2001 | Hussman
Without seeing your X-ray, it sounds like your BGAs are out gassing. This casues the situation you described. Try baking some BGAs and run them along with ones not baked to see.
Electronics Forum | Wed Oct 17 17:51:44 EDT 2001 | davef
This is a GREAT question!!!! Our process is similar, but our times are greater. Guess it's all dependant on the pressure on the pipe, eh? The faster money goes flying out the window, the less time there is for nicities.
Electronics Forum | Mon Oct 29 11:47:19 EST 2001 | mparker
Ian- I've been out of the office for a few days. Thanks for your direct e-mail address. I will contact you directly with the spreadsheets attached.
Electronics Forum | Wed Oct 24 12:18:03 EDT 2001 | Hussman
It's usually up to the board house. They use their lines to make a variety of other customers boards and never want to be locked into using a special mask. I'd task your QC department to catch and return these boards. That usually straightens out
Electronics Forum | Fri Oct 26 07:55:49 EDT 2001 | Kenny
Does anybody know how I work out how heavy a part I can have on the bottom side of the board while reflowing top. Obviously there is a tie between the footprint in the paste and the surface tension of solder paste, but what is it ?
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