Electronics Forum | Thu Nov 02 22:05:55 EST 2000 | Dason C
Chris, can we share some more information? I am running Motorola 357 BGA with PN XPC860MHZP50C and the problem for me is a large amount of void (checked by 5DX). I checked the ball surface and found some sketch on every single ball (it may caused by
Electronics Forum | Mon Nov 06 10:52:52 EST 2000 | Glen Mantych
Glenn, we have been fighting perhaps the identical problem for nearly a year on a 1mm pitch BGA, we have performed numerous laboratory analyses of defective joints and virgin parts in an effort to specifically identify the cause of the no-wet joints.
Electronics Forum | Mon Oct 16 11:10:51 EDT 2000 | PeteC
Excessive bridging on SOICW-20, -16, SOIC-8, -14,-16. I've got a board, 4" x 6" w/ SOICs on bottom-side for wave solder. I've checked topside board temp for flux activation, wave height, wave surface with the glass check-plate going from 1" to 2" spa
Electronics Forum | Thu Oct 19 00:54:26 EDT 2000 | PeteC
Top side temp. is 97C before the wave. No, we don't have the IR lamp on; we did try it though with no positive change. Solder alloy Multicore 63/37 Other boards run better. This one is the worse. We have not had good success eliminating bridges on SM
Electronics Forum | Wed Oct 11 16:05:16 EDT 2000 | NLykus
Does anyone have any experience with running a double sided/surface mount(bottom)board manufactured with CHEM 1 material? We are currently looking at cost cuts. My personal experience recently in running a D.O.E. against other materials and solder
Electronics Forum | Tue Sep 12 20:41:12 EDT 2000 | Dave F
Dunno, but maybe one of these taping contractors can give you an answer: V-Tek 214.479.9442fax1630 Surface Mount Taping 408.954.1400fax1470 Cofer 408.526.2050 KBK Electronics 613 S.Market St Lancaster, SC 29720 800.726.1887 803.286.6416 fax283.4115 A
Electronics Forum | Fri Aug 11 06:48:38 EDT 2000 | GJ
I am currently building boards which have to be conformal coated (done by an outside source) in a no clean process. The conformal coating however, must be applied to a clean surface. The flux residue left from the paste has come into question. I h
Electronics Forum | Thu Aug 10 13:30:54 EDT 2000 | Bob Willis
Solder skips on SOT23 parts is the most common issue when soldering surface mount designs. The two most common causes are the wave height too low or there is too much gassing of the flux as it contacts and seperates the wave. Stck some parts on your
Electronics Forum | Thu Jul 27 13:59:04 EDT 2000 | Chrys Shea
Sounds like the problem is design realted - here's a cheesy trick if your product/process permits: (you know how I love my cheesey tricks!) Put an adhesive dot between the pins that are bridging. If you're gluing bottomside SMT components to the bo
Electronics Forum | Thu Jul 13 10:10:48 EDT 2000 | Todd
Donnie In response to your questions; 1. Flux is Multi-core X32-10M 2. Preheaters temperatures can range based on board density. the goal is to get the top side to 100C before wave. 3. Components can't be placed after wave solder, they are surface m
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