Electronics Forum | Thu Feb 15 07:04:59 EST 2001 | CRAIGS
Antonio, one possibility I have seen before on BGA shorts was due to chain slippage on the reflow oven due to worn gearing, the slippage was not severe enough to move other SMT devices but was enough to disturb the molten solder under the BGA
Electronics Forum | Fri Feb 23 10:07:32 EST 2001 | jmlasserre
I would like to have some advise or explaination about the IPC610 spec. Page 6-51 and 6-52 concerning the solder stains on gold finguers: On the page 6-51, it's recommended to inspect the gold finguers with the unaided eye, but on the page 6-52, th
Electronics Forum | Tue Feb 27 10:29:48 EST 2001 | davef
Bud: Theoretically, I agree with you in-bound parts should meet your solderability requirements. Unforunately in real life, it aint gunna work, because if your buyer can't get you parts now, well 'cept the crusty ones that you're seeing, can you im
Electronics Forum | Fri Mar 02 14:39:41 EST 2001 | davef
Stefan: I'm with you. I know that the Siplace machines do that vacuum and visual component check that you describe. I just wasn't sure how the HS50 verifies picks. Same way? So often with things like this six sigma stuff, the definition of the pr
Electronics Forum | Tue Mar 13 02:18:07 EST 2001 | JT
Biggest problem with the IIF is placing components with varying thickness (i.e. multpile vendors). We have to adjust production programs at start of each run to prevent excess scrap. Line Sensor tolerances can be adjusted to accept a wider range of
Electronics Forum | Wed Mar 14 09:07:34 EST 2001 | blnorman
We just ran a study to try to determine this. We exposed the paste to 85% humidity to simulate worst case manufacturing. At various times we removed the paste from the chamber and tested it for tack, solder balling, wetting (copper coupon), and vis
Electronics Forum | Wed Mar 21 07:07:24 EST 2001 | bobnelms
Michael If I understand your note correctly, I certainly agree with some of it and disagree with some of it. Of course we all need to be able to communicate with whomever we have in front of us -- to speak and write at their level, etc. But to hel
Electronics Forum | Thu Mar 15 07:40:42 EST 2001 | jax
Most of the companies I have worked with have their own quality standards for items such as this where the standards are unclear. In this situation I wouldn't worry about repair as long as at least one location for each part number has the value mark
Electronics Forum | Wed Mar 21 14:26:40 EST 2001 | jax
Ed, Although I will have to agree with Boca that building your own boards is probably the way you eventually want to go, that is not a reason to go out and buy whatever machines you can afford at this point in time. Have you thought of sub-contractin
Electronics Forum | Wed Mar 21 21:28:22 EST 2001 | davef
We have RF boards with ... * No solder mask * Strategically placed globs of solder It's possible that your boards will not work with NC flux res on them. We generally don't see noise problems. We loose one of the edges [front I think, but don't