Electronics Forum | Wed Mar 30 16:46:03 EST 2005 | chunks
There is no spec because solder is designed to provide an electrical connection not a mechanical connection to hold the part on. If it where mechanical we�d be welding our parts on. Your pad width and length are derived from your component manufact
Electronics Forum | Tue Mar 22 20:33:24 EST 2005 | davef
Q1. What are you guys doing for filled/tented/plugged vias on the BGA site? A2. 2221A, 4.5.1 tells you the vias have to be tented on both sides. Q2. What type of issues can this cause if using no filled/tented/plugged vias on the BGA site? A2. BGA
Electronics Forum | Tue Mar 22 12:11:15 EST 2005 | jdengler
Bob, I don't have 300 stencils only about 83 so my way might not be practical for you. This is what I have done. 1. I have racks that hold 20 stencils, 10 top 10 bottom. 2. Number the racks and have them in order. 3. Made a number system for locati
Electronics Forum | Wed Mar 23 02:56:59 EST 2005 | Hannu
Hi all Can somebody share their experiences on the Asymtek DispenseJet systems? I am not interested in sales rep talk, I want to hear real-life facts. Mainly things like maintenance intensity (is that the expression?) and if there are any issues wit
Electronics Forum | Thu Mar 24 22:39:22 EST 2005 | pmd
My opertaors have lots of setup problems with vib feeders. They dont realize that the chip weight pushes parts down and when feeders run low it's the frequency that drives the parts. Mixing parts with diferant phisical deminsions and masses in the sa
Electronics Forum | Wed Mar 30 20:06:07 EST 2005 | Sue PH
Ken, I run a Triber and have a manual. This machine was bought used and came to this company before I did. It looks like the manual is a copy and someone wrote Treiber 700B-16F on the front page. I don't know if this is the same machine as yours o
Electronics Forum | Thu Mar 31 10:14:06 EST 2005 | davef
There's some nice low-VOC uV coatings out there. We don�t use uV cured coatings, but try: * http://www.emersoncuming.com * http://www.dymax.com * http://www.mgchemicals.com * http://www.loctite.com * http://www.humiseal.com Be aware that uV co
Electronics Forum | Fri Apr 01 10:27:58 EST 2005 | chunks
Wow, Daja Vu! Besides a 9 iron, there isn�t any official physical test you speak of. You can run a design of experiments to prove your joints are strong, but I wouldn�t suggest pushing, slapping or prying on a customers solder joints. Any such pok
Electronics Forum | Mon Apr 04 09:45:55 EDT 2005 | Homer
IPC may help, otherwise there are many factors: Are the PTH clinched or straight? If straight, what length protrusion? What direction are the parts running thru wave? Is product on a pallet? Not to mention your soldering process: What type of mach
Electronics Forum | Sun Apr 03 10:07:40 EDT 2005 | davef
In 2001, IVF evaluated the reliability of IBM CBGA and CCGA, i.e. packages with "hard" balls and columns, in space applications for the European Space Agency. One clear result was that amount of solder paste printed on the solder lands is very critic
