Electronics Forum | Sun Apr 16 14:37:25 EDT 2000 | Roberto Navarro
Hi, I work for Nortel and here rework BGA'S we use DRS22 rework station and CRT 2000 X-ray inspection. The main problem is put again the BGA on the PCB because you need reboling the PCB and you could damage the soldermask. Talking about Air-vac is ve
Electronics Forum | Thu Mar 29 08:23:02 EST 2001 | CAL
Some AOI manufacturers require you to put in a GOLD PCB. Gold PCB is a perfectly manufactured board - Correct placements, correct polarity, no solder short, a "GOOD" PCB. With the vision limitations of some AOI equipment components that have variatio
Electronics Forum | Sat Jul 28 03:05:35 EDT 2001 | Frank
Hi guy Does anyone have experiance with printing problem between solder paste water soluble 62/36/2 and gold plating PCB? I do have problem about insufficient solder after printing although I used the same printing parameter as when I print with ano
Electronics Forum | Tue Dec 07 21:28:00 EST 1999 | sosina outry
I had read all three reply to the interval of pcb in the reflow process already. Like Wolfgang said, base on the profiling and the temp that you set in there. The interval will be base on that temp. Some might have a gap of one pcb lenght, some mig
Electronics Forum | Thu Oct 14 04:12:32 EDT 1999 | Paul Gerits
Hi Jim, I'm a Technical consultant/Application specialist at Philips EMT. Tombstoning is a well know problem with Nitrogen ovens. Proberly there has been a change in your Nitrogen flow or in the nitrogen it self. To see if there was a change run a
Electronics Forum | Thu Oct 07 15:55:00 EDT 1999 | RICK_EEI
Hi everyone, I am having a problem with cleaning PCB's with different finishes. I run one type of board through a drag solder and it comes out perfect using a water slouble flux then putting it in an aqueous cleaner. Then I run another board with a d
Electronics Forum | Fri Oct 08 01:55:58 EDT 1999 | Brian
| Hi everyone, I am having a problem with cleaning PCB's with different finishes. I run one type of board through a drag solder and it comes out perfect using a water slouble flux then putting it in an aqueous cleaner. Then I run another board with a
Electronics Forum | Thu Apr 22 10:57:20 EDT 1999 | Jack Coia
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 ot
Electronics Forum | Mon Mar 08 09:23:02 EST 1999 | Dave F
| I need to attach / assemble Flexible circuit onto Rigid PCB without use of any connectors i.e. fingers / tracks of Flexible circuit are to be attached / directly to the fingers of the Rigid Glass Epoxy PCB. | | I need info on the alternate proces
Electronics Forum | Mon Feb 01 16:40:45 EST 1999 | Dave Waddick
I have a product using high temperature solder to connect terminal pins to a PCB. The board is single sided copper, no plaiting. The solder is 95% tin 5 % silver. The flux is low activity rosin. The product is a subassembly. When the product is
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