Electronics Forum: smema and good and bad (Page 4 of 7)

Fountain Wave Soldering and Repair/Rework Equipment

Electronics Forum | Thu Jan 21 09:27:33 EST 1999 | Earl Moon

Hello, I will be evaluating and qualifying two equipment types. The first is a fountain soldering device. I need practical advice on all the stuff you guys and gals know about as good, bad, ugly, best applications, setup, limitations, and all the re

Solder Paste and fine pitch components

Electronics Forum | Wed Sep 18 10:06:30 EDT 2002 | Bob M

I place 15-20 mil a lot. You need to look at your pad to apature reduction. Your stencil thickness. The type of paste your using. We use 2-5 mil reduction on each side as a general rule on fine pitch. This varies depending on pad width. We also use 5

lead free platings and tin lead

Electronics Forum | Tue Aug 31 19:17:43 EDT 2004 | russ

Now see Dave, now I have some good info on why it is "bad", This must be the lead enrichment I have heard about but never got any substantiated data or explanantion. I wonder how much weaker or less reliable these are. Is there any data that you k

Re: Fountain Wave Soldering and Repair/Rework Equipment

Electronics Forum | Fri Jan 22 15:48:14 EST 1999 | Chrys

| Hello, | | I will be evaluating and qualifying two equipment types. The first is a fountain soldering device. I need practical advice on all the stuff you guys and gals know about as good, bad, ugly, best applications, setup, limitations, and all

Re: Fountain Wave Soldering and Repair/Rework Equipment

Electronics Forum | Thu Jan 21 19:38:24 EST 1999 | dean

| Hello, | | I will be evaluating and qualifying two equipment types. The first is a fountain soldering device. I need practical advice on all the stuff you guys and gals know about as good, bad, ugly, best applications, setup, limitations, and all

Re: Fountain Wave Soldering and Repair/Rework Equipment

Electronics Forum | Thu Jan 21 20:22:02 EST 1999 | Earl Moon

| | Hello, | | | | I will be evaluating and qualifying two equipment types. The first is a fountain soldering device. I need practical advice on all the stuff you guys and gals know about as good, bad, ugly, best applications, setup, limitations, an

Re: Paladium Pillows and Bad Dreams

Electronics Forum | Wed Feb 25 01:24:34 EST 1998 | Steve Gregory

Dave, I confess I was a tad too general and a bit too extreme describing the way ALL solder joints look on palladium coated leads. I should been more specific about the "pillow-effect". I've seen it regularly with palladium coated leads on small SOT

Re: Tabletop pick and place equipment selection

Electronics Forum | Fri May 28 16:03:10 EDT 1999 | Jeff Sanchez

| Has anyone had experience with prototype-scale, table top Placemax and/or Manncorp pick and place equipment? If so, what has been your experience with the machines? Are they reliable? Did they meet all your needs? Which needs didn't they fill?

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Tue Apr 13 23:08:56 EDT 1999 | Jeff Sanchez

| | | Netters, | | | | | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | | | | | 1. Kester 293 no clean | | | 2. 2.1 C/s for 30s to 150 C | | | 3.

Re: Discoloring of Soldermask and silkscreen

Electronics Forum | Tue Apr 13 18:39:24 EDT 1999 | Tom B

| | Netters, | | | | When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? | | | | 1. Kester 293 no clean | | 2. 2.1 C/s for 30s to 150 C | | 3. .5 - .7 C/s f


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