Electronics Forum: 3.15 (Page 1 of 1)

Cleaning Copper Surface

Electronics Forum | Tue Jan 26 12:25:44 EST 2010 | blnorman

You can try a 5% solution of sulfuric acid. It's used to clean copper foils to IPC-TM-650 method 2.3.15 prior to testing for purity.

Solder On Gold Mounting Holes, Gold Pressure Fit Socket Lands

Electronics Forum | Tue May 06 15:33:36 EDT 2008 | operator

I know IPC-A-610 RevD has requirements for Gold Fingers and solder contamination. Is there any such requirements for Gold Mounting Holes, Gold Pressure Fit Socket Lands (SMT pads), Exposed Gold Traces ? Wouldn't these all be considered "critical cont

Cleaning under LCC's

Electronics Forum | Mon Oct 02 10:22:13 EDT 2006 | SteveH

We are having issues with cleaning underneath leadless chip carriers due to their extreme low lying nature and I wondered if anyone else had any experience of this. Our process for years has been vapour degreasing with Triklone N, which works, but w

through hole questions

Electronics Forum | Wed Nov 19 15:48:48 EST 2014 | gregp

Thank You Adam...this is the type of input I am looking for. To summarize, you are an OEM that has gone through the process to remove most through hole parts from your assemblies. Those that remain are primarily connectors which may not require lea

Re: Component Package Specs

Electronics Forum | Wed Jan 12 14:43:54 EST 2000 | JAX

Doug, Jedec has this info. Here is a few for you to use. LENGTH, L+LEADS, WIDTH, W+LEADS, PITCH, AVG. HEIGHT. 1. CQFP100AC: 17.28,22.35,17.28,22.35,.635,4.92 2. CQFP100AF: 32.52,37.59,32.52,37.59,1.27,4.92 3. PQFP100AD: 19.05,22.35,19.05,22.35,.

J-STD-001 Par 4.2.2 Temperature and Humidity

Electronics Forum | Tue Jul 17 21:48:09 EDT 2007 | davef

Per ESD Handbook TR 20.20 paragraph 5.3.15 Humidity "Humidity is beneficial in all ESD Control Program Plans. Contact and separation of dry materials generates greater electrostatic charges than moist materials because moisture provides conductivity

through hole questions

Electronics Forum | Wed Nov 19 15:16:47 EST 2014 | warwolf

Interesting, see we used to do a large amount of PTH but we have been able to convert most of those parts to SMT now. the majority of our PTH is connectors. I am doing some research as to the types of through hole assembly that still remain.- This d

Re: PCB fab supplier supplier/evaluation

Electronics Forum | Sun Aug 08 11:15:32 EDT 1999 | Earl Moon

| | Mike, | | | | Got your message and those of others concerning PCB fab supplier evaluation and qualification check lists, etc. I have a severe problem here in WI as I can hardly access the internet, and when I do it is cut off abruptly for no goo


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