Electronics Forum | Thu Apr 01 22:21:45 EST 1999 | Dave F
| We make an excellent chem-etch stencil. Our customers have had success printing 16 mil pitch without a problem. This is not an advertisement! | | When we try to sell our product to new customers, we find more and more people willing to pay more fo
Electronics Forum | Thu Mar 25 13:53:28 EST 1999 | Bob Willis
| | | Your problem may be related to silver migration (leaching) into the solder. I had what seems to be a similar problem. The solution was using solder with 2% silver content. See these pages for a bit more information: | | | | http://www.ferr
Electronics Forum | Thu Mar 18 17:18:22 EST 1999 | Earl Moon
| | Hi folks, | | | | I am looking for inputs on a long-standing problem encountered in our shop: Bottom-side parts (passives) falling off in the Wave...where the only remnants of the part is a flattened glue dot of proper diameter and volume, and
Electronics Forum | Thu Mar 18 20:08:34 EST 1999 | Steve Gregory
Are you suggesting there may be some chemical incompatibility between paste/flux chemistries and the glue being used - thus intefering with the glue's ability to bond properly? I've only heard of this possibility, but never experienced it. Justin, St
Electronics Forum | Wed Mar 31 14:30:11 EST 1999 | Dave F
| We have carried out some experimental work, in conjunction with DEK. Instead of dispensing adhesive for SMD components onto the bottom side of on of our PCBs, we have looked at the possibility of screen printing the adhesive. Because, at the stage
Electronics Forum | Thu Apr 01 03:04:22 EST 1999 | Scott Davies
Dave, Thanks for the interest. Basically, we looked at this project as a straight swap, i.e. printing the glue on the PCB using a Dek screen printer instead of our current method of dispensing glue using a Camalot dispensing machine. For the PCB we
Electronics Forum | Thu Mar 11 18:37:22 EST 1999 | John Watt
| | Folk's | | | | Looking for some help..I know it's not SMD but I'm sure someone will know. | | I'm trying to locate a supplyer for dispensor's for PTH DIP's for my panel assembly ( board stuffing) stages to improve tha handling. The vendor i used
Electronics Forum | Mon Mar 01 22:37:01 EST 1999 | Dave F
| Hello! SMT professionals, | | I do not know if anyone posted this question before. | Last week, I reflowed our newly designed thin Rigid-Flex pcb with 0.040" thickness. I found all of pins of a TQFP48 ic did not get wetted. I could see on the hee
Electronics Forum | Wed Mar 03 12:01:08 EST 1999 | Dave F
| I'm trying to get a feel for what the industry is doing with regards to collecting assembly defect data in the SMT/PWA process. Is it sampling or 100%? What are the points within the process where critical assembly defect data is collected. We run
Electronics Forum | Tue Feb 23 11:09:12 EST 1999 | Steve Gregory
Hi Dave! Dat' be da same board we ran at NEPCON East in 97'! Ray Rua was running the TAC line then (his company usually runs the TAC line at almost all NEPCON shows). A couple of things I wanted to point out on that GIF image that might b
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