Electronics Forum | Wed Mar 17 19:00:14 EST 1999 | Earl Moon
| | | We are having a small number (~2%) of our boards pass our manufacturing diagnostics, fail once they reach the customer, fail when they get back to us and then start working again after handling them for a short time. We have eliminated a lot o
Electronics Forum | Mon Sep 13 06:23:06 EDT 1999 | Earl Moon
| | We have a product, with various PWBs, with over 600 parts each one (We are a low Volume/high mix company with an average component placement per PCB between 250 to 300 parts). This PWBs have 7 to 10, 20 mils pitch parts. We are having problems wi
Electronics Forum | Thu Jun 24 12:43:08 EDT 1999 | Earl Moon
| | Recently, there has been an upsurge in the Pin Hole/Blow Hole problem in our wave soldering process. We are baking the PCBs for 2 Hrs. at 125 degree C. The Wave Soldering profile seems to be O.K. Still the problem is persistent. Can somebody h
Electronics Forum | Fri Mar 12 20:19:46 EST 1999 | Dean
| AVX and a few other companies make these chip transient voltage suppressors (TVS) parts that are a real *PAIN* to use. According to AVX: | "Due to the semiconducting nature of the doped Zinc Oxide (ZnO) ceramic material, SMT TransGuards ar
Electronics Forum | Thu Jun 11 23:21:16 EDT 1998 | Scott McKee
| I am currently reading as many articals as I can to familiaize myself with Surface Mount Technology. My company is planning to install a SM production line by the end of the year. | Here is one of my questions. | I have read that one of the specifi
Electronics Forum | Fri Apr 17 21:34:02 EDT 1998 | D.Lange
| Hello Ya'll, | I've got what may be a silly question, but why does it seem so important to everybody that you have x-ray capability if you're thinking about doing BGA? | I know what most people will tell me; "Steve, that's a pretty silly qu
Electronics Forum | Fri Apr 17 15:06:57 EDT 1998 | Justin Medernach
| Hello Ya'll, | I've got what may be a silly question, but why does it seem so important to everybody that you have x-ray capability if you're thinking about doing BGA? | I know what most people will tell me; "Steve, that's a pretty silly qu
Electronics Forum | Wed Dec 13 11:24:08 EST 2000 | Wolfgang Busko
Hi George, bad luck! That�s why we professionals get so much money for it. Those "thingies" are mainly capacitors or resistors. If a capacitor is missing you might with luck not even notice it. A resistor, that�s different, you will notice it, what
Electronics Forum | Wed Dec 13 11:24:10 EST 2000 | Wolfgang Busko
Hi George, bad luck! That�s why we professionals get so much money for it. Those "thingies" are mainly capacitors or resistors. If a capacitor is missing you might with luck not even notice it. A resistor, that�s different, you will notice it, what
Electronics Forum | Mon Jul 26 11:20:40 EDT 1999 | Kevin Hussey
| | | Which among the two profiling method is more reliable/accurate in getting the oven thermal profile? | | | | | | a) using a HIGH-TEMP solder wire then soldering the thermocouples onto the profile points of the board (e.g. component lead etc.) |
