Electronics Forum: back (Page 251 of 420)

BGA voids

Electronics Forum | Thu Jan 16 04:02:18 EST 2003 | johnw

The IPC 610 actally conflict's with 7095 which give's a better indication of what's acceptable. I believe that IPC are reviewing both. Motorola did a bunch of work before basically showing that void's aren't that bad up to a certain size, I think pro

RMA vs No clean

Electronics Forum | Thu Jan 16 15:55:31 EST 2003 | MA/NY DDave

Hi I have a funny feeling that Mike Konrad and I know each other from IBM-Endicott days, yet I could be wrong. It would be funny?? Mike gave a good answer. The Rosin or Rosin Mildly Activated Flux (RMA) if on the board at ICT (In Circuit Test) wil

BGA PCB Pad size

Electronics Forum | Fri Jan 17 21:17:18 EST 2003 | Grant Petty

Hi, Our paste release problems have been solved, and we worked on the stencil, and things are working well now. However this board was designed before we knew what was going on, and we thought a little more size on the pads would be a big help. Is

Stenciling chipbonder.....

Electronics Forum | Wed Jan 22 21:59:54 EST 2003 | davef

First, wheat beer is not intended to be consumed at this time of the year in the northern hemishpere. It is ment to be consumed on the back porch, while smoking the LARGEST cigar you own, after mowing the lawn on a day that is so hot that the dog ca

Wave Soldering - Icicling/Bridges

Electronics Forum | Fri Jan 24 17:05:17 EST 2003 | Hoss67

DDave, I do not have the benefit of having the old machine here for comparison unfortunately. Comparing topside wetting to old sample boards run on the older machine show similar results. No solder balls. I have a thermal profiler and have run ma

THT connector solder thieves

Electronics Forum | Thu Feb 13 10:15:09 EST 2003 | dwanzek

Bridges are front to back. To me this seems to indicate thieves would pull the solder away from the pins. I feel I am correct in that theory. Yes, it would be a good idea for us to bring in a consultant but I have the opportunity right now to make b

Nitrogen wave soldering

Electronics Forum | Sat Feb 15 15:39:53 EST 2003 | Joe

I have the identical machine and setup as you with the same issue(s). I looked at setting up for N2 but am choosing to retrofit to a standard lambda nozzle setup. If you are soldering bottom side SMT parts or other challenging assemblies, N2 may ma

Best/Common Practice in Blank PCB QC

Electronics Forum | Fri Feb 28 12:02:15 EST 2003 | MA/NY DDave

Hi You are right. I guess some of us missed this point in the way this on line dialog works. I like to put the specification that the PCB supplier must adhere to, on the Physical Print. The Physical print is often used by outgoing and incoming insp

Ionizing pressurized air for pcb blow-off

Electronics Forum | Sun Feb 23 14:51:02 EST 2003 | davef

Without being clear on whether you're talking about: * Standard air knives at the back-end of your in-line cleaner ... OR * Hand held or similar nozzle. Standard air knives: This causes no problem with ESD because the relative humidity is so high t

Immersion Gold over Nickle de-wetting problem

Electronics Forum | Tue Mar 11 13:35:04 EST 2003 | MA/NY DDave

Hey Neat, We share some of the same books, although I would strongly recommend he expand his collection. That Flex book is only one, the most pricey one, of many on that technology. JUST Kidding THANKS!! If we started listing all our magazine, te


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