Electronics Forum | Wed Apr 24 10:32:47 EDT 2002 | dougt
BGA's are sometimes difficult for a camera to recogonize as your not looking for the dark outline of a part with white lighting behind it but rather the white balls with in that dark component. If you don't mind experimenting a little I would play wi
Electronics Forum | Mon Apr 22 23:51:06 EDT 2002 | mkkrishnakumar
Dear sir, I am a regular viewer of smtnet.com and now one of my customer have the process problem that is they are having double sided smd's and pth too. hence we have suggested them to do the following processes First do the smd soldering by ste
Electronics Forum | Wed Apr 24 19:12:19 EDT 2002 | russ
I may be stupid but what exactly do you mean by "foil" on both sides? Are you having trouble with top flow? bridging? Are you using water soluble or noclean? Are you also waving SMT components? Anyway, normally the solder temp should be 460 - 500 F(
Electronics Forum | Sun Apr 28 05:36:54 EDT 2002 | Johan Bergstrom
I don�t believe I am reading this! Stefan, as a colleague feeder designer I have all respects for your knowledge, but you theorize without having tested this. The design team and I have been working with this technology for several years now. Sure,
Electronics Forum | Tue May 21 08:28:37 EDT 2002 | Johan Bergstrom
Many MYDATA customers might not be aware that some tapes are of PSA-type. They don't have to. In the early work with Agilis this was also an open issue for the design team, so several tests were made which showed that PSA would not be a problem. Rece
Electronics Forum | Mon Apr 29 22:41:36 EDT 2002 | davef
Refer to J-STD-33 - Standard for Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface-Mount Devices. You can be downloaded it free from http://www.jedec.org Assuming you want to meet expectations when selling your components to
Electronics Forum | Mon May 27 12:24:21 EDT 2002 | arcandspark
Carol, I beleive there is an IPC spec for Moisture control. We see all kinds of problems with boards coming from the vendors. We use to bake all bare fabs upon recieving them. This helped alot but waste time. We now rely on the board vendors to bake
Electronics Forum | Tue May 14 08:04:58 EDT 2002 | robbied
Hi. Does anyone out there know of a way to calculate the surface area of populated PCB's? We build many different types, and until now have been using a water displacement method, which I believe to be fundamentally flawed. Our technique is to drop a
Electronics Forum | Fri May 17 03:04:15 EDT 2002 | Mike Konrad
This conversation reminds me of the old �How Many Engineers Does It Take To�� joke. We manufacturer the ionic contamination (ROSE, SEC) testers and I am not aware of anyone that performs such exacting surface area calculations. Most people use th
Electronics Forum | Wed May 22 15:56:43 EDT 2002 | stefwitt
The play of the tape is quite significant as I mentioned in an earlier thread. Tape width can vary between 8.1 +/- 0.2mm. Demos on 0201's are most likely done with 8.1 +/- 0.05mm tape. I guess you are referring to the cover tape pull, which can dispo
