Electronics Forum: gold (Page 166 of 172)

Re: bare board problem

Electronics Forum | Thu Jun 17 21:24:32 EDT 1999 | Dean

| first of all what is the technical term for the small amount of solder on a plated pad. we are getting poor screen printing gasketing on a 20 mil qfp due to this solder not being even or too high in spots and not covering the length of the pads. an

Re: uBGA's

Electronics Forum | Fri May 14 17:06:18 EDT 1999 | Ryan Jennens

| | Hi Guys, | | | | I am going to be graced with the good luck of processing microBGA's in the near future. A bit of a step forward from printing 20-mil pitch and wave soldering 0805's, wouldn't you say? | | | | So, any of you folks who have alre

Re: uBGA's

Electronics Forum | Fri May 14 17:06:29 EDT 1999 | Ryan Jennens

| | Hi Guys, | | | | I am going to be graced with the good luck of processing microBGA's in the near future. A bit of a step forward from printing 20-mil pitch and wave soldering 0805's, wouldn't you say? | | | | So, any of you folks who have alre

Re: PCB Rework, Reflow Quiz

Electronics Forum | Sat Jan 16 09:03:28 EST 1999 | Earl Moon

| | | | For the engineers who enjoyed the last two quizs I put on my web page here are two more. One on printed board manufacture and one on rework and repair of surface mount boards. Its a bit of fun but I feel that on line training is coming and is

Re: PCB Rework, Reflow Quiz

Electronics Forum | Sat Jan 16 13:30:20 EST 1999 | marc p

| | | | | For the engineers who enjoyed the last two quizs I put on my web page here are two more. One on printed board manufacture and one on rework and repair of surface mount boards. Its a bit of fun but I feel that on line training is coming and

Re: Plating Processes

Electronics Forum | Fri Oct 30 01:07:34 EST 1998 | Earl Moon

| I am a recently graduated Process Engineer. I am working for a company developing and manufacturing printed circuit boards. I am looking for a web link, magazine article, book, etc which describes the processes which happen at a board house. More s

Re: Hot air knif in wave soldering

Electronics Forum | Mon Sep 28 10:12:53 EDT 1998 | Chrys

| Hello, | I need some users information about "Air knif" in wave soldering: | 1. Does it decreases bridging ? | 2. Is it self installed of a purchesed kit (if purchesed, who are the recomended vendors) ? | 3. Any other information about the issue. |

Re: Bob Willis Free Advertising and more serious issues

Electronics Forum | Fri Aug 07 07:44:56 EDT 1998 | Earl Moon

| | | No sour grapes, | | | This has gone on too long. I expect no free advertising, nor do I seek it. It is clearly understood Bob is an industry leading consultant. What is not understood, at least by me, how he is allowed to "advertise" so freely

Re: BGA reflow profile

Electronics Forum | Tue Jul 28 02:22:59 EDT 1998 | Bob Willis

Here is what I would do faced with your problem. First I would profile a similar board or use an existing profile. From there I would place the dummy device on the surface of a sample board with a thin thermocouple soldered to the board surface under

imm. silver

Electronics Forum | Fri Aug 30 16:25:21 EDT 2002 | davef

Imm silver holds-up to multiple thermal cycles very well. The things, we guess, are happening to make imm silver tough to solder after heating and sitting are: * Oxidation of the silver. * Reduction of the co-deposited organic anti-tarnish [used in


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