Electronics Forum | Wed Nov 07 08:06:29 EST 2001 | hany_khoga
Dear All : 1- We assemble mixed technology boards. For some reasons, sometimes we store them semi assembled (only SMT). Knowing that they have plastic BGA,s , can the wave solder m/c affect or damage those BGA,S on continuation their production?
Electronics Forum | Thu Nov 15 07:59:53 EST 2001 | John S
My company is in the process of evaluating dispensing/screen printing vendors for a new production line that will build a mixed through hole and smt board in high volume. DEK recently came out with a system that uses a thick plastic stecil with mach
Electronics Forum | Sun Jan 20 21:03:34 EST 2002 | peterson
Hello everyone! We just completed some 16-layer boards and noticed (after wave soldering) that there are some unique, white-ish discolorations. It looks as if someone layed their finger at weird angles on the groundplane areas. It is NOT finger prin
Electronics Forum | Mon Jan 21 09:27:02 EST 2002 | JohnW
Here's a question for you to mull over. I've got a PCB that is 4 millimeters thick, that's about 160thou of USA money if you like it that way. The question is IPC reg's for hole fill say it should be a min of 75% hole fill and 50% on ground planes. A
Electronics Forum | Wed Feb 06 10:58:21 EST 2002 | MikeF
My thanks to everyone that sent me a troubleshooting chart. I now have 3 different ones in electronic format that I've put into a Winzip archive. Anyone that would like me to send them a copy, please e-mail me at mflori@custom-mfg-eng.com and I wi
Electronics Forum | Thu Apr 18 16:57:41 EDT 2002 | cfraser
Currently in our facility we store used and discarded flux residues from the wave solder machines in 50 gallon drums. These drums are picked up and disposed of by an outside contractor. During a recent audit we were cited for not having the drums pr
Electronics Forum | Sun Apr 21 09:34:03 EDT 2002 | hany_khoga
Dear all: We need to glue some chip capacitors (0603 & 0805) before continuing the process of placing the topside SMT components. As a subcontractor we received the whole materials including the glue. After experimenting several temperature profiles
Electronics Forum | Fri Jun 28 03:04:21 EDT 2002 | Dreamsniper
Forgot to include the following: Dwell time is from 55 secs to 68 secs. Indium specs for the paste is maximum peak @ 228'C and 30 to 90 secs dwell time above 183'C. PCB is a 6 layer board with Dimension of 205 x 166 mm but is slightly dense with 11
Electronics Forum | Mon Jul 08 08:31:19 EDT 2002 | davef
Use where operators need to move frquently, say around process machiney, like placement or wave solder machines 2) wrist strap with continuos monitoring => => Use where operators don't move much and the potential to damage product is high, like a han
Electronics Forum | Tue Aug 13 17:03:37 EDT 2002 | Mick
The Electra and Electra 500 are basically the same. 20 or 24" As far as the other items Spray fluxer type can be picky on flux type(solids content etc)and also there are choices for selective spraying Check out finger conveyor config - may suit palle
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