Electronics Forum | Tue Sep 09 15:22:39 EDT 2003 | gdstanton
Anyone have any experience with immersion white tin over copper plating? We are seeing opens develop under BGAs after we bake and conformal coat. And when we lift the parts the pads are 60% of the original size. Need some advice on possible causes
Electronics Forum | Fri Sep 12 13:05:21 EDT 2003 | M Cherry
I'm trying to determine approximately how many SMT lines are in the San Diego area, including Tijuana, Tecate and Mexicali. I don't need actual company names or even type of equipment just number of lines, although the other information would be h
Electronics Forum | Tue Sep 23 18:48:57 EDT 2003 | ericsbrown
We have an application where we are applying a heatsink with a thermal tape that has pressure sensitive adhesive (psa) on either side. Does anyone know of an off-the-shelf heatsink press that we could use to apply a consistent, measured force for a
Electronics Forum | Thu Sep 25 22:36:41 EDT 2003 | fastek
It wasn't that long ago that your beloved UIC was attempting to charge $20K to license a GSM. Are you saying they don't have a license fee structure any more? I bet they still do. I feel the fees charged by the SMT OEM's are justified as many are as
Electronics Forum | Mon Sep 29 02:35:28 EDT 2003 | Sam
Hi Mantis. Has there been any changes in the BGA itself? One of our BGAs changed to a newer type, and after that we had problems with corner lifting. In that case problem was BGA's structure, there was mismatch in TCE between BGA's substrate and mo
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 15:45:35 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 | 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
