Electronics Forum: pva and 650 (Page 3 of 3)

Re: Cracking Capacitors and Solder Balls

Electronics Forum | Mon Jun 08 15:29:17 EDT 1998 | Gary Simbulan

| Earl, et al, | Boy things get old and cold around here fast. I promised more detail on my capactior problem and I thought I could drop something completely different in the same message and tell a tale of solder balls. | First the caps. We stil

Standard of PCB Bow and Twist in Incoming Inspecion

Electronics Forum | Thu Feb 27 12:27:10 EST 2003 | stevel

Hi all, We got some bare pwb in our incoming inspecion looked really wrapped. The maximum twist of the pwb we messured is 0.056inch by following the method in IPC-TM-650 2.4.22 C. (The diagonal size of our pwb is 7.5inch) According to the IPC standa

Need help on PCBA Cleanliness Standards and Specs

Electronics Forum | Tue Nov 25 16:26:43 EST 2003 | tdurston

We are trying to establish requirements and process controls for completed, cleaned SMT assemblies. We have problems with our high impedance circuits (100 meg ohms) being affected by residue. Some boards require additional cleaning cycles to remove

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