Electronics Forum | Sat Feb 12 10:33:31 EST 2000 | Francois Racine
First I'm a french people so excuse my bad english writing. I have a complete smt production line. First a screen printer DEK 240, a chip shooter PANASERT MVIIV, a multifonction machine MULTITRONIKS EP6000, a reflow oven at the end of the SMT line a
Electronics Forum | Sun Feb 23 14:32:42 EST 2003 | davef
Sources of sulphur in PCB fabrication are: * Some locales have high H2S concentrations in the air. * Metal etching steps that use sulfuric acid or a sulfonated buffering compound may result in sulfate residues. * Sulfates can come from contact with
Electronics Forum | Sun Dec 03 15:35:44 EST 2000 | Michael Nguyen
Wow. And I thought I was the only one having problem with ceramic capacitors.I too am having problem with cracking ceramic capacitors 1206 package.We changed vendors and still having the same problem. I had to reverify my entire process and I had to
Electronics Forum | Mon Nov 27 17:50:01 EST 2000 | Dave F
Mike: It gets more humid in the winter? [I can see it�s true (not that I�d doubt you) cause I�m looking a a humidy map of the USA, right now] How does that work outin Californy? [Do the ocean breezes move the humid air in-land in the summer? Er w
Electronics Forum | Mon Nov 27 19:32:02 EST 2000 | Michael Parker
Prof. Whoopee - amazing facts that you find on your 3-D BB, it has completely confounded my comrade, Chumley. Plainly spoken that around the SF Bay Area a.k.a. Silicon Valley(ever hear of the famous SF Fog?)during the winter months, near the coast a
Electronics Forum | Thu Nov 16 22:01:16 EST 2000 | Early Moon
I promised never to do this - BUT only for you needy folks when I have nothing else to do. And Dave's basically a good person though not as needy as most really needing this stuff. 1) Ensure internal Gerber data really matches board and stencil (Ger
Electronics Forum | Wed Oct 25 12:24:02 EDT 2000 | Philip
Hi Chris! I hope this will help you! The CBGA uses an array of high melting point solder spheres(Sn10/Pb90) to connect its ceramic chip carrier to an epoxy glass (FR4) PCB using eutectic (Sn63/Pb37) solder joints at both ceramic and card inter
Electronics Forum | Tue Oct 24 12:20:35 EDT 2000 | JohnW
Adam, Did some work on this a bit back via some good old Taguchi DOE and like Dave(the guru)F say's your component terminations is a big factor but I also foundthat the amount of flux you put on as well as the preheat's has an effect, generally we f
Electronics Forum | Wed Oct 18 10:02:04 EDT 2000 | Jason Nipper
I know it's a tin residue because we have a Cheme in house who had a spectrum analysis performed in an outside lab. The waves parameters were out of control long enough to effect a number of units that are, we�ll can I say substaincial in a fiscal s
Electronics Forum | Sun Oct 01 05:00:08 EDT 2000 | jarnopy
Okay, you have only few different product. Smallest package is 0402 and biggest is 144 pins ic. So, maybe you don't need get high-speed machine. You must place about 12000cmp/hour. You can buy quite cheap placement machine. I can't tell what is good
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