Electronics Forum | Tue Sep 25 14:25:30 EDT 2001 | davef
Points in response are: * Microstencils work fine with paste, although they are a little fussy to use. * Never have used microstencils for flux. * Like Hussman, we dab the uBGA into a puddle of tacky flux and then place it on the board. * On contro
Electronics Forum | Tue Oct 09 12:30:26 EDT 2001 | mparker
Cal - even trolls were smart enough to outwit most back in the day. I appreciate your input as well as Dave's. I agree about doing the retest. I just didn't have the right info, just some gut feel that made me question the purported lab results. I h
Electronics Forum | Wed Oct 31 18:00:51 EST 2001 | Jonathan Mitchell
Hi All! In the near future we will begin to take on products that require a reflow process on both sides. We will run the backside first (smaller components) to reduce the chances of a part falling off during the second reflow, but my question is abo
Electronics Forum | Wed Nov 14 08:29:32 EST 2001 | dxiong007
Hi DaveF, Thanks for your suggestions. You are good man! Couple of years ago, I asked a question in this Forum, you are the first one gave me help. I also read many topics almost all of them have your comments and suggestions. I think in all those y
Electronics Forum | Tue Nov 20 12:48:40 EST 2001 | tony_sauve
We recently experienced a problem w/voids (up to 65%) in uBGA solder joints. The only joints that have the problem correlated to pads which had blind 0.006" via's in them. The via's only extend down 2 layers, of the 18. 21 BGA's on the PCB, only expe
Electronics Forum | Fri Dec 07 15:23:27 EST 2001 | davef
I'm with Brian. TIN COATED 0603 FAILURES Welcome to the lead-free generation. ;-) The Eurolanders are so blanking stupid, it just makes my head hurt. But then again, it doesn�t take much. OK, enough pontification. Your profile is setup incorrec
Electronics Forum | Thu Dec 13 21:14:46 EST 2001 | davef
See. That's the connector that I thought it was. No, don't change your project!!! It sounds perfect. This will be a wonderful "learning experience" for you. You should get yourself a magnifying glass, some solder, and a soldering iron and go t
Electronics Forum | Thu Jan 24 13:23:53 EST 2002 | Shawn
Thank you all very much for the responses. The solder is eutectic and the problem, as far as I can tell, has been around before I was here, 2+ years. The flow machine is a treiber with 2 bottom preheaters and 1 top. The solder pot temp is 500F +/-4F
Electronics Forum | Fri Feb 08 08:00:48 EST 2002 | caldon
Yet Again Dave spills his pearls of wisdom. Dave is correct in the moisture content wood absorbs. I know we have all visited factories with wood board holders and such. I have actually seen wood carts with drag chains. Also, keep in mind static can b
Electronics Forum | Thu Mar 07 12:33:39 EST 2002 | peterson
We are currently examining the issue of AOI machines (both in-line and off-line) It seems that the only positive remarks I find are written by the salespeople representing AOI manufacturers. Can someone please refer me to a more neutral source? My in
