Electronics Forum | Mon Jun 18 13:29:34 EDT 2001 | nifhail
What is the recommanded profile for board which consist of 0402 & 0201 comps. to reduce the effect of tomb-stone. Slow ramp rate ? how slow is considered as slow. Soak time 60 or 120 C,at which end should I stick to? what is the best time before reac
Electronics Forum | Thu Jun 28 10:46:44 EDT 2001 | genny
Thank you. I'm sorry if I came across frustrated or anything, but I wasn't sure if people were ignoring the one question I kept asking or if, as you said, they just didn't know. Here's the deal. We are a small company rapidly growing into a larger
Electronics Forum | Thu Jun 28 10:31:18 EDT 2001 | caldon
Borg Collective?????......7 of 9 is almost worth half my S&*% (Stuff) and becoming a drone. Guaranteed, I ain't dreaming of any Pick and place machines.If it were to happen the machine would be smattered with Hottie female operators willing to load
Electronics Forum | Wed Jun 27 21:05:48 EDT 2001 | davef
BGA Cycle 1: solder ball attach. BGA Cycle 2: BGA attach to board. BGA Cycle 3: BGA removal from board. BGA Cycle 4: BGA pad dress. BGA Cycle 5: BGA ball replacement. BGA Cycle 6: BGA re-attach to board. Board Cycle 1: BGA attach to board. Boar
Electronics Forum | Tue Jul 03 08:14:49 EDT 2001 | Stefan Witte
If you hold your board sideways in a 90 degree angle you apply a force of 1 g to your components. 1 g translates into 32 ft / sec. square. This is not too much acceleration for fearless roller coaster drivers but Melf�s and Tantalums can fall off at
Electronics Forum | Wed Jul 11 20:17:05 EDT 2001 | davef
I�ve written a review to be published in an up-coming SMTnet Newsletter of �Printed Circuit Assembly Design� Leonard Marks, James A. Caterina [Hardcover - 368 pages (July 26, 2000) McGraw Hill Text; ISBN: 0070411077]. In short, � In �Printed Circui
Electronics Forum | Sat Jul 14 10:34:42 EDT 2001 | davef
This portion of SMTnet is intended for people whining about the operation of the forums and what-not. A lot of the people asking questions like your use the production forum. We don't have an air knife on our wave, but I recall some threads on SMTn
Electronics Forum | Wed Jul 18 08:00:48 EDT 2001 | davef
250C flass transition temperature - M = coloring agent or opacifier added to F resin with 110-150C glass transition temperature - N = natural color of resin - P = coloring agent or opacifier added to resin - T = natural color F resin blended with
Electronics Forum | Thu Jul 26 13:17:45 EDT 2001 | Hussman
Most solder paste manufacturers will take a reasonable amount of paste back, just so they won't loose your business due to bad paste. But if you're asking to ask to ask - separated paste from flux is not a bad thing if the jar was never opened. Pas
Electronics Forum | Mon Jul 23 20:18:18 EDT 2001 | davef
Prasad�s book, that an earlier poster mentioned, is good, but other books to consider are: * MacLeod Ross �Guide Design & Manufacturing V1 & V2� Electrochemical Publications * Wassink & Verguld �Manufacturing Techniques For Surface Mount Assembly� El