Electronics Forum | Tue Sep 30 02:11:05 EDT 2003 | msimkin
We are having a problem with one of our chip sets. We have had a sudden change in performance, detrimenatally, and we beleive it may be a result of a change in die size. we need to prove this. Does anybody know a good contact or company who specialis
Electronics Forum | Tue Sep 30 21:08:17 EDT 2003 | George
I just start training as operator of a Samsung CP-11E Pick-and-Place machine. I would like to know where to find info or tutorials about those machines or general info about "how smt pick-and-place machines work ". I have not found anything on the we
Electronics Forum | Wed Oct 01 15:34:22 EDT 2003 | johnpatricelli
It won't help your operation of a pick and place machine, but if you are just beginning to train your Operators, an excellent beginners' reference for SMT parts and package recognition can be found at TopLine Dummy Components' website, http://www.top
Electronics Forum | Wed Oct 01 15:45:35 EDT 2003 | Jalinous Esfandayri
Hi Everyone: Does anyone know what the right silicone for bonding the pressure sensor bare die on PCB is? How do I prevent the fracture and keep good adhesive? Any help would greatly be appreciated. Regards, Jalinous Esfandyari Intelligent
Electronics Forum | Mon Oct 06 18:41:47 EDT 2003 | davef
In addition to our earlier comments, do not be misled into thinking that silicone materials, being rubbery, will transmit shock less. Nothing is farther from the truth. Many silicone rubbers are almost totally incompressible in the short time scale.
Electronics Forum | Fri Oct 03 08:41:00 EDT 2003 | gregp
JEDEC and IPC for instance do have conventions. But they are only typically for existing part types and do not coincide with one another. I think the bigger problem is the new components and the unusual components that don't seem to fall into any p
Electronics Forum | Wed Oct 01 21:22:37 EDT 2003 | ramanandkini
We have a 1.6 mm thick automotive PCB board of size 35x70mm. One of our vendor has given us a batch with lesser soldermask thickness 5~8 microns. Will this affect the circuit board on a long term. What should be standard for the soldermask thickness?
Electronics Forum | Thu Oct 02 10:55:37 EDT 2003 | caldon
Brad- The Spec can be downloaded free from IPC at http://www.smema.org/smema1.2.pdf (or IPC.org search for SMEMA Standards). As per Conveyor edge clearance should be .187" or 4.7mm. Regards, Cal Communications Test Design, Inc. www.ctdi.com
Electronics Forum | Thu Oct 02 11:08:45 EDT 2003 | russ
We verify each reels P/N prior to placing into the machine for any reason. I have been bit even harder than John. We built 80 boards with 672 per 0402s when we discontinued the two operator process. We now even have them read the numbers backwards
Electronics Forum | Thu Oct 02 11:09:57 EDT 2003 | James
Yes we verify every reel by some other operator. We hardly make mistakes now, due to the fact that they have to also write the initials of who verified it. There used to be many mistakes due to wrong reels, but now it is slim to none. It is better t
