Electronics Forum: sample pcb expired solderability test report (Page 1 of 12)

expired solder paste

Electronics Forum | Fri Apr 04 08:49:45 EDT 2008 | ck_the_flip

Define "expired" though... 1 week? 6 weeks? 1 month? 6 months? Unrefrigerated life is generally 30 days. If paste has been stored refrigerated at manufacturer recommended temperatures, what would you guys do, like say, if you owned your own shop

How do you do the 1st sample inspection?

Electronics Forum | Wed Apr 04 10:32:10 EDT 2018 | dleeper

At an EMS I used to work for, our process for first article inspection was to have a human technician do a point to point comparison between the BOM and the PCB. They would verify component part #s were correct per the location, correct polarity and

Is there a cross section standard test method...

Electronics Forum | Wed Mar 26 09:19:20 EDT 2008 | nibirta

hi all...well i`m working in such a lab but we are working internally, and for our customers. But i can give you some prices from other labs. Cross section-one location is around: Solder Joint Integrity Std. sample plastic package $300.00 Shorts /

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Mon Jul 26 10:25:12 EDT 1999 | Boca

| | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is that a

Re: Ghost circuit shorts under smt resisters only when they are located on solder side of pcb (glued down)

Electronics Forum | Mon Jul 26 14:14:51 EDT 1999 | Steve Gregory

| | | We are having a process related problem with pullup resistors on a controller card which has a I960 micro-processor. | | | The controller monitors signal inputs and it's own resources then blinks a LED to indicate its working. The problem is th

PCB storage for lead Free

Electronics Forum | Tue Sep 16 09:35:12 EDT 2008 | babe7362000

Can anyone tell me if there is a procedure for storing raw PCB's? We currently are seeing an issue with lead free boards with dewetting. We tracked it down to one or two datecodes, but not all of the boards have dewetting. Is there a expiration da

Moisture under chip capacitors

Electronics Forum | Thu Sep 11 15:23:31 EDT 2003 | Peter L.

I have come across a rash of failed assemblies that have 0805 capacitors and resistors, bottom side glued, wave soldered and washed. Trouble shooter reported touching up the solder joints on a few areas and the boards would pass test. I had a look a

Temperature cycling

Electronics Forum | Tue Apr 09 05:10:39 EDT 2002 | sanchai

Dear sir, Do you have experiment about the temperature cycling and vibration test for reliability testing of surface mount solder attachment. If yes, please give me the soft file sample of parameter setting and testing report.. Thank you very mu

Measure humidity for PCB

Electronics Forum | Tue Apr 13 14:49:15 EDT 2010 | davef

90%) from the sample, and the bake time and temperature specified herein are minimums. To improve test accuracy, or to prevent heat damage, other bake parameters may be AABUS. 2 Applicable Documents IPC-QL-653 Certification of Facilities that Inspect

Re: HAST and HALT

Electronics Forum | Sat Oct 24 06:07:09 EDT 1998 | Earl Moon

| Hi, | Am looking out for companies which would perform the "highly accelerated stress testing" for my PCB test assembly samples. does anybody have any info regarding this. | thanks, | subhash | Most independent PCB test labs, often doing military

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