Electronics Forum | Thu Aug 12 14:55:08 EDT 2004 | johnw
Hi guys I havnt been on for a while so its nice to be back been working in europe mostly Fuji CP6 skewing rnets Marcels comment is the closest rnets are a problem as said before the main areas are 1 A good assmbley shape is a must with 30% defaul
Electronics Forum | Mon Aug 02 16:54:07 EDT 2004 | davef
If you eliminate this test, how would you monitor the cleanliness of your: * Bare boards * Components * Processes You probably could get a c of c from your board fab, but a c of c from the component suppliers would be burdonsome [and agruably useles
Electronics Forum | Tue Aug 03 09:38:39 EDT 2004 | Danny
We are a small PCBA contract manufacturer based in Malaysia. Sometimes, our customers request us to provide X-ray inspection on BGAs. Due to our production mode is towards high-mix low-volume, it is a bit difficult justifying purchase of X-ray inspec
Electronics Forum | Tue Aug 03 09:47:39 EDT 2004 | AJ
Hi All, I have a question for everyone regarding SSD - Solid Solder Deposit. I have read many good articles on this "new" process and was wondering why it has not caught on. It is better known in the US as SIPAD or Precision Pad Technology. Here is
Electronics Forum | Thu Aug 05 19:10:53 EDT 2004 | celldude
wash->ssd top->wash->sticky flux bottom side->place smt components->reflow->wash->sticky flux top side->place topside smt components->reflow->wash) ssd is basically the process of applying solder paste to the pcb with a stencil and the solder reflowe
Electronics Forum | Fri Aug 06 11:36:15 EDT 2004 | russ
I see how that works in your shop, I was thinking of when you have someone else do it for you and then both sides would have to be done at the same time and then double reflow isn't very viable with out glue. How do you flatten the solder after refl
Electronics Forum | Sat Aug 07 17:27:00 EDT 2004 | celldude
We use ssd on all components, from 0201 to very large fine pitch and bga's. With some very small micro bga's , if there is a problem with bridging, we will tape off the stencil during the ssd process and just use bare pads...along with the solder fr
Electronics Forum | Tue Aug 03 16:52:41 EDT 2004 | Dreamsniper
Hi, What contributes to the above? I've got some BGA solder joints with a crystal like flux attached to it like a mini solder ball but do not have a perfect round shape. I had my aqueous cleaner's DI water sent for analysis and everything looks okay
Electronics Forum | Wed Aug 11 07:41:52 EDT 2004 | gregoryyork
Check cure of solder resist. Use a No clean low solids rosin flux this will stop problem. Should see almost zero solder balls if put through a single wave compared to a dual wave. If this is true then it is a resist issue and cannot 'resist' the sold
Electronics Forum | Mon Aug 16 04:55:30 EDT 2004 | roel
Concerning the solder-balls, there are a few causes for this. Try to slow down your solder-speed (P.e 80cm/min). Can you measure temperature after the pre-heat zone? Are there also blow-holes in the joints? Personally I think there is some water in t
.gif)
