Electronics Forum | Fri Dec 13 09:06:30 EST 2002 | russ
One thing I have found when using square or diamond etc... Fiducials is, if it is a HASL finish board, the finish may be thick and the fid camera will see them having rounded edges different sizes etc.. and will cause quality failures. Russ (My sp
Electronics Forum | Tue Dec 17 08:46:59 EST 2002 | Randy Villeneuve
Personaly I would try a different solder paste. Give Indium a call and get a sample of their SMQ92J No clean. You will be impressed. Alpha and Kester also have good products but we have a long history with this paste and we have printed millions of b
Electronics Forum | Mon Dec 30 01:31:36 EST 2002 | MA/NY DDave
Hi I think you already have the answer. It isn't the same as the true comparator of yesteryear, yet YES, some of the assembly machines have visualization post placement, compared to a golden board or dimensional images imported into the software.
Electronics Forum | Sun Jan 19 10:25:54 EST 2003 | davef
You shouldn't freak. You want the pads on both sides of the BGA ball the same so that the torgue from changes in dimension due to different CTE [ie, interposer, solder, bare board, etc.] is balanced on the top and the bottom of the ball. So, the ma
Electronics Forum | Mon Jan 20 01:46:24 EST 2003 | Claudia
I am looking for a FPBGA adapter (pin 256 pitch 1.00mm size 17mm x 17mm). We need the adapter to interconnect the FPBGA from the handset board to a SW test board. Question: Where can I find BGA adapter with different heights? What do we have t
Electronics Forum | Tue Jan 21 20:51:47 EST 2003 | davef
I assume you want to convert your BGA to PGA. We talked about converter / adapters here on SMTnet Previously. Search the fine Archives. For insyance: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=5315&#Message207
Electronics Forum | Sat Feb 01 15:25:42 EST 2003 | MA/NY DDave
Hi Again I would rather you have someone analyze this rather than using another person's data from potentially a completely different type of application. The fact that he said the reliability was the same as rigid kind of bothers me. Usually on fl
Electronics Forum | Fri Feb 21 10:03:43 EST 2003 | genny
Sure they'll do it...If you're willing to pay double or triple the cost. It might not be as easy as you think. the value is usually marked in white over the black carbon area that actually is the resistor. Underneath is just the white ceramic carr
Electronics Forum | Fri Feb 21 14:20:56 EST 2003 | jseagle
Has anyone actually seen 0402 or 0201 part with the value on it? I haven't. So what would be the big deal if these parts are placed upside down. The only difference I have noticed is usually on a resistor one side is black and the other is white an
Electronics Forum | Tue Feb 11 13:12:25 EST 2003 | Jim Mills
Use a PCB fab house that is capable of "Conductive Via Filling" is the way to do it right. A conductive epoxy is used to fill the drilled via PRIOR to final plating. After final plating, the surface of the "Filled Via" will appear to be the same as t
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