Electronics Forum | Tue Oct 09 22:42:38 EDT 2012 | davef
You're correct. It hinges on who's talking about a "production printed board." * You think a "production printed board" is the board that you're trying to produce and ship. * Your fab thinks a "production printed board" is a 30-up panel. It would be
Electronics Forum | Thu Oct 11 17:15:31 EDT 2012 | boriskilk
We have seen two issues which have caused problems with solder mask adhesion. The first was improper curing of the mask but also solder temps which were too high, particularly with a white tin finish. Rather than tell your supplier their material i
Electronics Forum | Tue Oct 09 14:30:32 EDT 2012 | bandjwet
Put on your Chemical Thinking Caps..... We are ablating the mask of a PCB which was over a copper layer. This exposes copper. Outside of an electrical test (no can do) how could we use a fast non-destructive test in order to determine that copper (
Electronics Forum | Tue Oct 16 11:02:05 EDT 2012 | terry_zhang
Has anyone tried to immerge the PCBA(with ICs, resistors, capacitors,connectors populated) into IPA for 1hr? The temperature of IPA is about 60~70C, is there any damage or degrating found for PCB and the components? Is there any related information s
Electronics Forum | Tue Oct 16 13:40:07 EDT 2012 | surajdn
and are there good chances of open contacts and solder errors? and are they cheap? (im talking about the manual pick and place machine) and yes... i also wanted to know what are skills i must master to be able to work with smt. and where can i lear
Electronics Forum | Thu Nov 15 03:07:35 EST 2012 | nikyta
Thanks for your reply. As already said by Anvil1021, is not a good idea to mix Lead and Bismuth! Stay away from Bismuth if you have even the slightest traces of Lead on yours PCB, stencil, squeegee, spatula, blade, cleaning paper or cleaning cloths,
Electronics Forum | Tue Nov 20 11:57:25 EST 2012 | torch
has anyone ever tried running these devices through a reflow process soldering the tab to the pcb then soldering the TH connections? we have a device which needs fitted but we are soo tight for space that we cannot use a conventional screw/nut to hol
Electronics Forum | Mon Jan 21 12:43:13 EST 2013 | emeto
A good fixture is the key here. The first side should be easier than te second(if double sided). In both cases I will try to level the top of the board with the top of the fixture. Try to lock with pins comming from the fixture to the PCB holes. This
Electronics Forum | Fri Feb 01 05:18:59 EST 2013 | eniac
If you have a hard-gold on your pads, it's not a problem. Hard gold can give to you 4 or 5 times for PCB soldering (BGA repair). Soft gold (or flash-gold) can destruct, after that will start a migration of nickel up through gold, your pads will be
Electronics Forum | Wed Feb 06 08:36:34 EST 2013 | leigh
We have used a OK International APR-5000-XLS for the past 5 years, and have never had any issues with it. It works great on all types of BGA's and PCB's. There is sufficient heating topside and bottom, you can hook up thermocouples and fine tune yo
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