Electronics Forum | Thu Jul 03 12:03:00 EDT 2003 | slthomas
So, there is a crack or gap between: * Solder and component termination. Bingo Correct? Describe: * Coarseness / smoothness of the metal on the termination underneither the crack. * Solder left on the termination. Unfortunately at 45X I can't rea
Electronics Forum | Sun Jul 06 10:07:03 EDT 2003 | MA/NY DDave
Hi Sam, Great answers so far. Let me take a stab at a few of your questions. Q1. whether this is named Pososity? I can't tell from your description. Several companies and the IPC have porosity tests to see if the Gold has good coverage of the und
Electronics Forum | Mon Aug 18 12:02:18 EDT 2003 | russ
It all dependes on the de-paneling method. V-score - .100" is probably to thick for manual seperation. There are machines that I believe can cut through a V-Score up to .125" or greater Breakaway tabs - .100" is getting to the limit when doing t
Electronics Forum | Mon Oct 06 12:37:18 EDT 2003 | ramanandkini
It was a nice discussion. What I did here was a thermal shock test 1 hour@ +90 deg.c and immediately 1 hour @ -40 deg.c. The second test I did was a high humudity test for a week. After each test, I carried out a peel test with scotch tape. Those bo
Electronics Forum | Thu Oct 09 13:14:20 EDT 2003 | MA/NY DDave
Hi If I read things correctly you have quite a problem. I am inclined to scrap the entire LOT. I will give some hints at what to do as others have, yet you might want to bring someone in if the loss in revenue is high. I don't know your lot or run
Electronics Forum | Fri Oct 31 03:48:14 EST 2003 | Chebby
Cool! Can you tell me your prices. I need to design device that will make voice announcements in public areas (buildings, public transport). Example: commercials, or announcements. Have to be simple and convenient, as small as it can be. Simple navig
Electronics Forum | Tue Nov 04 17:08:04 EST 2003 | davef
We have this in our hydrometer use notes. We assume it's from our hydrometer supplier. Temperature Correction All hydrometer readings must be corrected from the temperature they were read at, to the temperature the hydrometer was designed for. Mo
Electronics Forum | Sat Nov 08 09:42:22 EST 2003 | ethercom
Hi: I have seen this problem before. It is caused by improper curing of solder mask by the fab manufacturer. When you run the board thru' wave solder, and then wash the board, you see the problem of white residue. However, when you apply heat, you c
Electronics Forum | Thu Dec 04 07:30:50 EST 2003 | ex maintain leader
Hi Grant, I'm ex Fuji Service Engineer, Fuji GP 6xx is the best but for companies in ultra high tech (2 side cleaning+ long life operating, BUT not easy to teach the technicians). Ask Panasert create series is also well durable, but I newer use yust
Electronics Forum | Fri Dec 12 17:19:08 EST 2003 | davef
Here's two angles to think about. Solder goes to the component and not both the board and the component because: * Component lead is much hotter than the the pad on the board. [This probably doesn't apply in your case, because it doesn't repeat fro
