Electronics Forum | Fri Aug 19 11:13:40 EDT 2011 | eezday
I'm still sold on the "black pad" model. The price of gold should be a good indicator of what is happening. The gold plating solution is being used well past its life and plating times are stretching. Extended time in the plating solutions is a lo
Electronics Forum | Tue Feb 11 22:28:25 EST 2003 | davef
What do you mean by "new information"? On final module testing: * If you have hypercorroded nickel and you detect it during final testing, you'll notice it. * If you have hypercorroded nickel and you don't detect it during final testing, you'll ship
Electronics Forum | Fri Nov 08 08:52:54 EST 2002 | dphilbrick
Juan There are many things that cause this and the first thing I would do is request quality records from your board fab facility on that particular lot. If they are unwilling to give them to you this is a good sign they had a processing problem. Th
Electronics Forum | Sat Jan 26 21:33:39 EST 2013 | sarason
Looks like you have a carbon black process that isn't quite plating to completion, pin prick size holes have remained in the plating. When dipped in an etchant (ie any acid or H2O) the holes grow and they leak carbon. This may be more of a problem th
Electronics Forum | Mon Aug 22 22:40:52 EDT 2016 | twhoo
analysis report is as attached. Pls let me know what you think of the root cause of this issue? Can i conclude this is a black pad at thru hole ring with a root cause of contaminated gold
Electronics Forum | Fri Oct 02 11:14:10 EDT 1998 | Scott Cook
| I am experiencing solder paste comtaminatin of nozzels on 0603 size components resulting in missing components. The machine is failing to alarm under these circumstances. Has anybody else experienced this problem & found a solution? | Ben, We us
Electronics Forum | Tue Sep 21 16:09:08 EDT 2004 | davef
Q1: What is "enough surface free energy"? A1: Look here for background: http://www.azom.com/details.asp?ArticleID=1575 Q2: How do I determine surface free energy? A2: We look at it a relative term. For instance, a semi matte finish on solder mask
Electronics Forum | Thu Jul 01 00:51:56 EDT 1999 | Scott Cook
| Steve, | | First of all I don't disagree with you, but 104 caps perform a power smoothing function not a data signal function. | | A PCB will still function despite a few dead cap locations. | | It won't function without certain IC lead contact
Electronics Forum | Sat Sep 14 01:34:19 EDT 2002 | Yngwie
I have the following questions on Via in Pad and want to understand each of them wrt : - complete Via in pad - partial encroachment - via partially in pad 1) What is the general feel for via in pad for upcoming designs? 2) What are the manufacturi
Electronics Forum | Thu Mar 25 11:19:11 EST 2004 | paul_bmc
Thanks for the informative posting.. When I power up the machine this is what I get.. 1. The movable cutter does not actuate the cutter knifes. (The head still jogs 360 and the movable cutter moves in the linear axis but the c&c motor does not act
