Electronics Forum | Wed Nov 29 06:38:18 EST 2000 | Chris May
Dear People, Can anyone point me in the right direction. I am involved in manufacturing low volume (batches of 4-20) pcb's. I have been investigating Process Characterisation ref EIA/JEDEC PUBLICATION 132. For such a low volume scenario, has anyo
Electronics Forum | Mon Nov 27 16:31:07 EST 2000 | Chris Jackson
I am evaluating several pieces of Siemens equipment and would like to get some input from industry users. I am seeing that Siemens is able to meet cycle time estimates and thus throughput. I am concerned about the robustness?? Any input is welcome. T
Electronics Forum | Tue Nov 28 21:07:44 EST 2000 | Alvin K
Gold is porous and spots on gold plated PCBs is one of the drawbacks of using gold as a solderability protector. Base Nickel exposure seems to be the cause of this and is aggravated when the gold thickness is less than what it should be. I agree with
Electronics Forum | Fri Nov 24 01:12:28 EST 2000 | SARRY
Hello! All I am an almost smt biginner. I have a few questions My question is 1. what will be changed to use lead free solder paste in a smt production line? 2. what is the reflow profile for lead free solder paste? Don't just tell me to search th
Electronics Forum | Fri Nov 24 07:10:39 EST 2000 | Chris May
Sarry, Word on the street is that your profile will have to be hotter, maybe up to 20C hotter, I have trialled lead free. The sales guy said, "Right, lets reprofile your oven ! I said, "No, lets try it as it is.....! The results were fine, as the
Electronics Forum | Tue Nov 21 22:46:32 EST 2000 | Chryzs
Hi! Does anybody kow about a bga rework station that accurate and does the job (as possible) in one axis (no table moving after chip placing ... Something very accurate (I'm using a SRT Pinnacle 500 and it's not ok... NOT AT ALL) Thanks a lot! chry
Electronics Forum | Wed Nov 22 10:17:48 EST 2000 | CAL
We currently have 5 BGA,uBGA rework stations in house and all perform excellently. The manufacturers are A.P.E, OKI-Metcal, and Manncorp. The A.P.E. and OKI both have moving tables and work great. The only system that does not have a moving table is
Electronics Forum | Mon Nov 20 06:51:00 EST 2000 | Daniel Carlsson
Does anyone have information regarding: -Moisture level (wt%) that may cause delamination in PCB�s. -Baking time and temperature if using a Vacuum Drying Cabinett and if using an air oven. (What I�m most interested of is Poly-Imid-Aramid.) -Are ther
Electronics Forum | Mon Nov 20 04:04:42 EST 2000 | Gyver
Sirs, Please do me a favor to answer the following questions, thanks a million! 1. Will the baking of BGA or PCB cause more oxidation before the SMT process? 2. What is the acceptable Life Time of solderability at customer site? The time that the sol
Electronics Forum | Thu Nov 16 18:19:10 EST 2000 | Dave F
We want to improve our process for accepting SMT solder paste stencils received from suppliers. Our process: * E-mail CAD aperatures to supplier with "readme" giving specific fabrication instructions to the supplier. * Receive stencil from the suppl
