Electronics Forum: double sided pcb (Page 141 of 199)

Re: Hot Air Knife

Electronics Forum | Mon Mar 13 14:41:22 EST 2000 | Boca

By Hot Air Knife I assume (leave it alone Dave F.) that you mean a debridging knife located at the exit end of a wave solder machine. Russ is right, they are not a good substitute for a good process, but once the process (w/o HAK) is developed, it

Re: Hot Air Knife

Electronics Forum | Mon Mar 13 14:45:01 EST 2000 | Boca

By Hot Air Knife I assume (leave it alone Dave F.) that you mean a debridging knife located at the exit end of a wave solder machine. Russ is right, they are not a good substitute for a good process, but once the process (w/o HAK) is developed, it

Re: Broken capacitors

Electronics Forum | Fri Dec 08 23:02:24 EST 2000 | LeeKibler

Beware the foam fluxer. I had a problem with cracked caps that just about drove me off the deep end. I discovered that my foam fluxer air knife was not turned on resulting in excessive flux. The excessive flux (VOC free) was not properly dried off

Nodules in barrel plating

Electronics Forum | Mon Sep 11 14:07:26 EDT 2000 | Steve

Hi ya'll!! We've got some PCB's in receiving inspection that has these little nodules in plating inside all of the barrels. These are microwave PCB's and have almost all of the surface area on both sides covered with with solid metal planes, and no

Re: Hot Air Knife

Electronics Forum | Mon Mar 13 14:41:22 EST 2000 | Boca

By Hot Air Knife I assume (leave it alone Dave F.) that you mean a debridging knife located at the exit end of a wave solder machine. Russ is right, they are not a good substitute for a good process, but once the process (w/o HAK) is developed, it

Re: Hot Air Knife

Electronics Forum | Mon Mar 13 14:45:01 EST 2000 | Boca

By Hot Air Knife I assume (leave it alone Dave F.) that you mean a debridging knife located at the exit end of a wave solder machine. Russ is right, they are not a good substitute for a good process, but once the process (w/o HAK) is developed, it

Re: Discoloured soldermask

Electronics Forum | Thu Apr 22 14:36:33 EDT 1999 | Dave F

| On various PCB's after building processes,such as reflow, flowsolder and wash. The soldermask on the PCB's have become discoloured, like a 'marble' effect all along the solder side of the board, it is lighter in contrast than normal, although when

Re: Discoloured soldermask

Electronics Forum | Thu Apr 22 18:07:38 EDT 1999 | Tom B.

| On various PCB's after building processes,such as reflow, flowsolder and wash. The soldermask on the PCB's have become discoloured, like a 'marble' effect all along the solder side of the board, it is lighter in contrast than normal, although when

Water Residue Stains - how to remove?

Electronics Forum | Wed Dec 19 02:24:40 EST 2001 | ianchan

Did I mention, we tried to use the same WS flux formulae to brush-cover the affected flex-PCB pads, and subject it to another round of water-wash, followed by oven-baking, and it still doesn't help abit? Oven bake : 100 deg-C, approx 15~30mins (manu

BGA Picture Evaluation

Electronics Forum | Thu Apr 10 19:21:02 EDT 2003 | tony_sauve

Kevin, One point that I'd like to make is that in order to get an accurate reading of the solder joint temp's you need to have the thermocouple right at the ball/PCB interface. I'd recommend precision drilling a mechanical sample of the unpopulated P


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