Electronics Forum | Tue Jul 16 21:28:41 EDT 2002 | davef
Questions are: * What is this green material? * What does the green material look like? * What the impact of this material on the long-term reliability of your customer�s product? * What flux did you use to solder these boards? * How were the boards
Electronics Forum | Thu Jul 18 09:55:05 EDT 2002 | gdstanton
Mike, When we measure solder inspection yield by dividing the number of defective joints on a CCA by the total number of joints on the PWB. A defective joint is classified only once. That is we don't count multiple defects on the same joint. Our
Electronics Forum | Mon Jul 29 21:45:13 EDT 2002 | davef
Your board fabricator can tell you how they want you to specify boards that do not have solder on the fiducals on the rails. They probably do not need some BIG stinking drawing change, but can operate from a letter. [And even if you run the change
Electronics Forum | Fri Aug 02 11:48:23 EDT 2002 | johnw
I can't think of any off hand other than the Ersa which is massive and from when I used it a pain in the A*SE to program and keep programmed, you always seem to have to baby sit it. I bet if you asked you could get one, the problem is that forced con
Electronics Forum | Tue Aug 13 09:47:49 EDT 2002 | johnw
Hi Folk's, a quick and easy? question. Got a card with PTH edge stiffeners fitted to it so we need to flow solder them. Having problems getting hole fill, mainly I think due to 2 things, poor pin to hole ratio and also a bit of oxide. The question i
Electronics Forum | Sun Sep 15 08:35:42 EDT 2002 | davef
That 60+% print defects number has been bantied around for so long in the electronic assembly business for so long that people believe that it's true. One starting point for this myth and lore is: "Where Quality Is Lost On SMT Boards" C Mangin, 'Cir
Electronics Forum | Fri Oct 04 01:18:27 EDT 2002 | sarge
1.5. Width >= 4-5 Particle Diameters. Use the smallest opening to determine this. Using dimension of the smallest aperture width, you should be able to fit minimum of 4-5 solder balls side by side into the opening. For 0201 design, -400 mesh (type
Electronics Forum | Fri Oct 18 17:47:37 EDT 2002 | russ
What is the determination of poor soldering fails pull test, non-wetting, visual)? I have never heard of an SMT component that has leads higher than the body of the component. Refer to IPC 782 3.6.1.7 it provide the guidelines for SMT standoff heig
Electronics Forum | Tue Oct 22 13:28:03 EDT 2002 | slthomas
Brian, Since the change, I have seen numerous instances of extra zeros being added to numeric values, typically those of 3 (original) characters or more. Case in point, a contribution by our friend Mr. Fish that I have cut and pasted: "The steadfa
Electronics Forum | Tue Oct 22 15:32:09 EDT 2002 | ruppertg125
We are a military contractor and need to build to IPC610 class3. We are receiving many parts with palladium leads and currently use a No-clean solder paste. We have evaluated OA pastes with very little improvements. Without a touch up of all leads th
