Electronics Forum: circuit (Page 13 of 254)

How long to burn in a circuit board

Electronics Forum | Fri Feb 11 10:37:54 EST 2000 | Leslie Hall

I'm trying to find out what is considered a standard or what other companies are doing to test their cuircuit boards. Is everyone using a envirmental room if so what is the ramp up and how long do you test it? Thanks

Re: Bare PWB bake out during circuit assembly

Electronics Forum | Mon Nov 08 11:11:16 EST 1999 | John Thorup

Believe it! Although it might be necessary in certain rare cases, and as Ray says, as a bandaid, to routinely bake your boards is a mistake. For much more info, search the IPC technet archives over the last few weeks. It was a popular thread

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Mon Aug 31 18:18:45 EDT 2009 | smtdrkd

You may like to contact Mike Bixenman of Kyzen Corporation at 615-831-0888 or Ravi Parthasarathy of Zestron Corporation at 703-589-1198.

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Tue Sep 01 06:55:22 EDT 2009 | davef

Rocko: While you're rooting around with the cleaner to better understand the issues with your water supply, monitor the heaters of your cleaner. We've had instances were the heater control has created "white haze" problems. Are you sure the residue

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Wed Sep 02 11:54:34 EDT 2009 | davef

You can determine empirically what will work. * Use ion chromatography [IPC-TM-650 2.3.28] to evaluate the residues and determine if the residues must be removed. * Use energy dispersive spectroscopy for the elemental analysis or chemical characteriz

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Wed Sep 02 02:45:01 EDT 2009 | rocko

Hi All, Let me summarize the key facts and findings: 1) This is not a permanent problem. Only one production batch was affected. The cleaning solution was exchanged and now the cleaning process runs normally. 2) Probably the residues are not ion

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Tue Sep 01 02:54:30 EDT 2009 | rocko

Hi davef, In response to your questions: 1) It is a programmable washer designed for the tough demands of industrial applications. There is an integrated forced air dryer with both coarse and HEPA filters. 2) The surface of the PCB panel, the comp

ionic residues on the surface of printed circuit assemblies

Electronics Forum | Wed Sep 02 21:57:17 EDT 2009 | davef

contacts for cleaning contractors are: * Petroferm Contract Services [www.partscleaned.com] Franklin, Ky * Aqueous Technologies [www.aqueoustech.com] Rancho Cucamonga, CA * FinePoint Precision Cleaning [www.finepointinc.com] Kokomo, IN * Austin A

Re: How long to burn in a circuit board

Electronics Forum | Fri Feb 18 09:12:13 EST 2000 | Leslie Hall

Thanks Dave F for you 2 cents. You bring up some important points that what one person is doing isn't neccesary right for us. Someone might burn in their boards for 10 hours in temperature but their ramp time is only an hour versus someone else is

Conformal coating to avoid oil leak from circuit board

Electronics Forum | Sun Nov 10 15:36:06 EST 2013 | davef

Assuming your conformal coating material was selected with the intent of living a life in contact with oil, why doesn't your coating meet the IPC-A-610D requirement of that there be no voiding, no breaks in the surface, no loss of adhesion, etc? Furt


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