Electronics Forum | Tue Aug 22 16:13:08 EDT 2000 | Dr. Ning-Cheng Lee
FR-4 will be OK for small products such as cellular phones. Here the temperature gradient across the board may be 3-4C only, and the board temperature can be well controlled. At temperature above around 245C, the discoloration and delamination may be
Electronics Forum | Wed May 10 16:49:14 EDT 2000 | Michael Parker
I would like informnation regarding this high heat withstanding type material for PCB, also any other types that are compatible. We currently use FR4 but have an application that may require most advanced composition.
Electronics Forum | Thu Aug 27 21:59:56 EDT 1998 | Xingsheng
Hi, Friends, Could you please recommend me some solder mask materials and equitements for high quality solder mask? Details such as company name, phone numer et al are welcomed. Thanks! Have a good day Xingsheng
Electronics Forum | Sat Aug 29 08:43:35 EDT 1998 | Dave F
| Hi, Friends, | Could you please recommend me some solder mask materials and equitements for high quality solder mask? Details such as company name, phone numer et al are welcomed. Thanks! | Have a good day | Xingsheng Xingsheng: Consider the follo
Electronics Forum | Wed May 26 16:36:02 EDT 1999 | John Thorup
| Looking for help in finding suitable high temp gasket for | use in smt assy support application. | | Gasket used to restrain flex on smt module in area prone | to localized heating due to nearby device removal (hot air). | | Current gasket mtl (n
Electronics Forum | Tue May 12 10:02:52 EDT 2009 | dwl
I am trying to develop a process for building high environmental temperature PCBs (150-225C) specifically for down hole applications. I'm specifying an evaluation board and was thinking about using polyimide PCBs with Sn05Pb92.5Ag2.5 solder. What so
Electronics Forum | Tue Jun 25 09:14:00 EDT 2024 | bupole
I think for most, so long as you have an operator running the line I don't think there is a need as you can generally set the lines in a way or manage the material flow in such ways that production or productivity doesn't take a hit if a person has t
Electronics Forum | Mon Nov 05 19:43:09 EST 2007 | davef
"Effects of surface finish on high frequency signal loss using various substrate materials" - Call Don Cullen at Mac Dermid or Larry Gatewood at Rockwell Collins for a copy.
Electronics Forum | Wed Aug 15 16:04:23 EDT 2001 | davef
First, responding to your question � Several things on copper dissolution in solder are: * A 50um copper wire will dissolve in 60Sn / 40Pb solder at: - 200�C solder in 55 seconds; - 250�C solder in 20 seconds; - 300�C solder in 5 seconds; - 350�C so
Electronics Forum | Thu Feb 11 09:12:46 EST 2010 | blnorman
Have you checked to make sure the mix ratio is correct? My experience with epoxies is that if the mix ratio is off with too much hardener you will get a much higher exotherm than expected. Modulus is high too, pretty stiff material.
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