Electronics Forum | Mon Feb 19 13:31:25 EST 2001 | billschreiber
Hello Mark, EPA Certification can be a tremendous help to the user that is evaluating new cleaning processes. Let�s face it, if it wasn�t for the Earth�s ozone layer, everyone would still be using CFCs and a vapor degreaser to clean stencils, PCBs
Electronics Forum | Sat Feb 24 14:22:53 EST 2001 | johnthor
Well, here I am working Saturday. Seems my production Supervisor had the nerve to get sick on an overtime weekend and, for some peculiar reason, the execs expect the numbers to be met anyway. Go figure! Let me backtrack and clarify that it was th
Electronics Forum | Fri Feb 23 17:35:49 EST 2001 | mattias
Ok. F.Y.I How I could make this work: We use Almit V14, and SMT ovens. You can say that we don�t do our maintenance as good as we should. Our Smt Quattro peaks are equipped with process gas cleaning (wich works quite good actually) I ripped out the
Electronics Forum | Tue Mar 20 20:12:32 EST 2001 | davef
In response to a similar question Dennis Fritz [DDFRITZ@AOL.COM] Chair of the Alternate Final Finishes Committee of IPC (5-23d) said ... The Alternate Final Finishes Committee of IPC (5-23d) has nearly completed a round robin "conditioning" study of
Electronics Forum | Thu Mar 22 17:31:08 EST 2001 | davef
Hold off on the sharp knife for little bit. [Yano, I get "queasy" when I see much of my blood, but other people�s blood doesn�t bother me much. Weird, eh?] [Oh bye-da-bye, I didn�t win the bar bet on "Ground Hog Day". I didn�t loose it either. T
Electronics Forum | Wed Apr 11 00:17:03 EDT 2001 | Dreamsniper
Hi, We got a 0.5mm pitch QFP144 from Altera with the below lead width specs. min. lead width = 0.17mm nominal = 0.22mm maximum = 0.27 What's the best pad or land width for the above? This is what our designer used. Land Width = Component Lead Wi
Electronics Forum | Thu Oct 26 13:56:08 EDT 2000 | ptvianc
Hello: Pre-baking laminates should only be performed:(1) to meet contractual agreements or (2) in response to an actual defect that can be traced to PWB water absortion. Besides the fact that a pre-bake is an enormous process "bottleneck," it also
Electronics Forum | Sat Feb 05 05:10:53 EST 2000 | Dean
It would be helpful to have some additional info on your line and process. Lets make some assumptions... Consider: re-tooling costs for your fab supplier. Can your supplier hold the additional tollerences for a larger panel. Can your supplier fab
Electronics Forum | Mon Jan 31 14:08:26 EST 2000 | Ashok Dhawan
I have got a number of assemblies back from a customer with feedback that the solder fillet is less than 25% of chip height per IPC-Standard-610B Class 2. Most of my joints are having good wetting but fillet height does not meet min ht requirement of
Electronics Forum | Tue Jan 18 03:00:23 EST 2000 | cklau
Hi there; CAD s/w and h/w are very expensive investment these day's , exspecially for EDA(Electronic Design Automation).Since that many of the CAD data is not compatible to each other format then it is very important that they choose the right one.H
