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Warp PCBA- how to repair

Electronics Forum | Sun Jul 15 20:10:09 EDT 2001 | Danial

What is the best method to repair Warped PCBA. Obviuosly twisting it back to make it flat would be a disasterous. The method that I've tried wold be mounting the assembled board to the flat holder with the clamp and bake them at 120 Deg C for about 4

X-ray capabilities needed for Xilinix 1152-ball BGA

Electronics Forum | Thu Feb 03 13:23:30 EST 2005 | caldon

Hi Steve- We have a Glenbrook system and are pretty pleased with it....as far a value vs. cost it works great. I did have an issue with a Soic with a ground plane in the center...yes SOIC!!! The Ground plane was a heat sync that had vias for thermal

Contamination test

Electronics Forum | Mon Jul 30 21:03:44 EDT 2001 | davef

You should specify the level of res based on the effect of the res on the end-use of the product. J-STD-001 defines cleanliness requirements for ALL flux types, including water soluble and no-clean that you mention. 1 There is no equivalency betwee

Re: castellations vs. no castellations

Electronics Forum | Mon Jul 26 19:32:03 EDT 1999 | Steve Gregory

| Can anyone give me the virtues of SMT package castellations vs. no castellations with particular reference to the ruggedness and reliability of the solder joints? Any references or studies that you can point me to? Also, although I'm in favor of

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Fri Sep 10 09:03:52 EDT 1999 | ScottM

| | hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the prec

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Fri Sep 10 12:09:02 EDT 1999 | Earl Moon

| | | hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the pr

Re: how to overcome tolerance in automatic alignment

Electronics Forum | Sun Sep 12 08:20:04 EDT 1999 | se

| | | | hi, i m college student. i m currently doing my Final year project in PCB drilling. the main task is to design auto feeder which allign the PCB properly in position before drilling take place. the close tolerance becomes a big problem to the

Re: Help I need DATA on Thermal shock caused by REWORK!

Electronics Forum | Sat Oct 02 20:19:19 EDT 1999 | John Dwinell

| | I am currently in the middle of a company wide war and I'm looking for data (AMMO). Here are the problems: | | | | 1) I am looking for anyone who has done or seen any reports on Thermal Shock to smt parts and/or via holes caused by Soldering Ir


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