Electronics Forum: rework (Page 271 of 293)

Solder Bridging on BGA

Electronics Forum | Thu Jun 13 20:55:46 EDT 2002 | russ

Having just gine through a similar problem myself (with much less equip.) Here are a few things to consider and/or look at Do you have the proper pad size? It should be the same size as the pad on the BGA. Is the board warping during your operati

Vent Residue Cleaning

Electronics Forum | Wed Aug 14 12:20:17 EDT 2002 | dragonslayr

in other words- who gets stuck with the latrine duty? (have seen American Graffiti, where the "effluent" was burned off with diesel fuel, Lord help the person who got stuck downwind!) The thought of having to swab a tube with some sort of cleaner ma

50 PPM

Electronics Forum | Wed Aug 21 18:24:24 EDT 2002 | dragonslayr

surely, a big picture perspective is in order to keep from charging off, tilting at windmills and waning Quixotic. Just to tic ya off a bit more (come on now, smile), would those 2 boards in rework have just one defect each or are there multiple def

PCB's for oven profile testing

Electronics Forum | Wed Aug 28 18:08:07 EDT 2002 | MikeF

This looks like it may be a good application for an Air-Vac or Wenesco type solder station. It is a solder pot that has a small motor to pump solder up through a chimney. You can put different nozzles on the top of the chimney, so you only apply sold

solderability

Electronics Forum | Fri Oct 11 09:28:14 EDT 2002 | davef

Designers love to do BIG copper pours for several reasons: * Maximize heat spreading. * Increase EMI shielding. * Laziness. The poor folk that solder the parts on boards HATE big copper planes near solder pads. During soldering, fat copper traces [

Making a BGA stand up

Electronics Forum | Thu Jan 16 03:43:42 EST 2003 | johnw

1st off for the forum folk, I don't like the fact that the new system only let's you see the posting your replying too, I'd rather be able to see the thread..... Anyhoo, why this alloy?, it's because it's the device manufacturers preferred and the c

Bareco wax on pressfit connectors?

Electronics Forum | Thu Feb 27 17:24:34 EST 2003 | pauld

Forgive the non-SMT question. That's why I hate through hole boards. Has anyone ever used Bareco wax on pressfit connectors, and how do you produce a consistent process for its application? Any drawbacks? Background: We have found a design issue with

BGA attach eval.

Electronics Forum | Thu Apr 03 09:08:50 EST 2003 | rdr

Thanks Scott,Iman, The problem has been isolated to detachment from package so I believe that there are no fabrication issues related to the Gold on the PCB. What is a Moyet analisys? where can I find more info? Dave, I am still waiting on Altera t

Epoxy Covered PCBAs Means to prevent hacking?

Electronics Forum | Mon Sep 22 23:27:09 EDT 2003 | severs

By "hacking" do you mean altering the performance of the board or something else? This reminds me of something I saw a while back. Better termed counterfeiting than hacking, it may have some relevance to what your friend is trying to do. The probl

Ceramic Caps

Electronics Forum | Tue Feb 24 09:52:14 EST 2004 | davef

First, two points about hole / barrel fill are: * A filled hole is an excellent indicator of the optimum process and optimum quality PCB. * The study that showed that holes need not be filled was paid for by the US Army and performed by Lockheed in


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