Electronics Forum | Wed Feb 16 14:47:04 EST 2005 | Valerie
Mike, To answer your question, Yes we have thru-hole parts on the boards that we converted to double-sided reflow, we use pallets to select solder the leads. I suppose Masking would work, but that's using a lot of mask. Can I ask, whats preventing
Electronics Forum | Wed Feb 16 16:41:31 EST 2005 | Mrduckmann2000
Pallets will not work in this case because the wonderful designers put 0402's between the legs and all around the legs of the thru-hole connectors. There are 18 thru-hole connectors on this board and 200 - 0402's around them. The 0603's that are al
Electronics Forum | Fri Feb 11 13:20:38 EST 2005 | caldon
- As Dave said American Competitiveness Institute is a good place to start with SMT process. they have Three lines geared to various manufacturing practicies. They also have a full compliment of inspection, x-ray, failure analysis, and rework. http:/
Electronics Forum | Wed Feb 09 13:25:08 EST 2005 | jdumont
Good day all, I am wondering if there is a company out there that sells kits that contain a board, components and the stencil? When we get our new reflow and wave machines in I will need numerous boards to run and evaluate until I can get the process
Electronics Forum | Wed Feb 09 14:23:41 EST 2005 | russ
First off how thick is your stencil going to be? I have printed .5mm pitch with .009" apertures with a 6 mil stencil. A 5 mil would have been better but the 6 worked just fine. Pitch is not necessarily the deciding factor for paste type. it is the
Electronics Forum | Fri Feb 11 01:36:22 EST 2005 | brown
OK I am counting someone knowing this. True or False, if my touch-up operators touch-up the smt solder joints too many times will this make the joint weaker? if yes why? and what happens to my intermetalic layer? I have insisted if it looks good don
Electronics Forum | Fri Feb 11 09:32:16 EST 2005 | patrickbruneel
"Finally, going back to your original point "I have insisted if it looks good don't touch it." That's the real issue. You and your operators have different standards. [Can you imagine how much touch-up your going to have when you go to leadfree?]"
Electronics Forum | Fri Feb 11 09:44:01 EST 2005 | pjc
A touched-up solder joint is never as reliable as one soldered correctly by machine. Touching up adds more heat thereby increasing the thickness of the intermetalic bond. Our goal is to have the thinest intermetalic bond in our solder joints. The int
Electronics Forum | Fri Feb 11 11:56:02 EST 2005 | Brian W.
Don't forget the possibility of causing component damage in addition to board damage. Reworking a ceramic capacitor with a hot iron can cause microcracks in teh capacitor. You probably won't find those until much later in the process, maybe even in
Electronics Forum | Fri Feb 11 16:58:24 EST 2005 | steve
I know this has been dealt with in the past but I couldn't dig up anything in the archives. If I'm soldering a 0402 lead free component with 63/37 solder is this a problem. Also lets take the opposite. If I'm soldering a lead bearing 0402 with lead f
