Electronics Forum | Tue Feb 28 07:50:06 EST 2006 | amol_kane
we have used blue and red color solder mask on a trial basis for our LF assemblies. We are performing expts using Imm Sn and Imm Ag to determine the best surface finish. Also, we pass the LF baords thru the same inline wash as you dont wash away the
Electronics Forum | Fri Mar 31 14:46:06 EST 2006 | Alex
We use the SC-205 head and we are pretty satified (just keep everything clean and keep a constant viscosity to eliminate nozzle problem). I'm not sure what you mean by keep out area but you can determine with quite precision by software where you wan
Electronics Forum | Thu Mar 30 10:21:44 EST 2006 | Dan
Sorry about that(My bad), they are copper. I believe the same thing, we need to reduce the appatures as we are already at 5mil. Our main problem is the customer...Their tests were failing and for some reason they touched that part up, and then the un
Electronics Forum | Thu Jun 08 22:54:31 EDT 2006 | hunghung
Dear all, If a PCB board, 2 mils of core with 1oz copper at the top and bottom, is it a good board to be fabricated? will it be caused warpage during etching for inner layer process? if yes, what is the real factor caused to warpage? How to solve t
Electronics Forum | Tue Jun 20 10:26:07 EDT 2006 | samir
Chunks, I used to work in power electronics, and we had this design engineer who used to "blow moisture" on the high-impedance circuit and test for cleanliness. We were water washing in a OA-Water Soluble environment. He was convinced that there w
Electronics Forum | Thu Jun 29 08:57:07 EDT 2006 | jdengler
You have given little detail for anyone to help. What types of components are laying in the machine? Are these components missing from the PCB? But you can check these things. 1. Check vacuum at nozzles 2. Check for obstructions in the path of the
Electronics Forum | Tue Jul 18 15:47:07 EDT 2006 | Mark
IPC610 training to help verify issues that might arise. Also, the opeators need to know part numbers and descriptions because that should be common knowledge when running a SMT line. Plus, with your comment "At our company they know how the pick&plac
Electronics Forum | Tue Aug 29 06:00:47 EDT 2006 | bwet
Ladies and Gents: There have been several studies including (http://www.solder.net/PDFs/LeadFree_BGATesting_InitialCycling_BEST.pdf) which have shown lower fast pass yields with solder paste. Based on internal projects of 1000+ of the same BGAs we a
Electronics Forum | Wed Aug 30 08:06:45 EDT 2006 | scombs
The reason I asked earlier about Gridlok is that we are using the on 2 Dek Horizon printers (since Jan 06) with edge clamps and they work well. We run them in Auto mode so they conform to the board at each print so I do not have to worry about the op
Electronics Forum | Tue Oct 31 09:43:06 EST 2006 | SWAG
Yes, this board is approx. 3" x 17" x .062"T with large areas of ground planes. However, the delam. does not seem to be confined to the plane. We also see it around component pads and fiducials. Generally speaking, it could be said that the first
