Electronics Forum | Wed Aug 31 11:02:28 EDT 2005 | Jason Fullerton
We are using one BGA that has 7 mil bumps on a 20 mil pitch. We use the manufacturer's recommended pad and aperature layout, which is an 11.8 mil square overprint on a 6 mil land. At 11.8 square, you need to use a 4 mil laser cut or a 5 mil e-form st
Electronics Forum | Wed Sep 21 16:23:36 EDT 2005 | 14367
I was going to ask the same question. As was mentioned, it depends on the classification of product. If it's IPC Class 3, with a requirement for high reliability, I'd want the OEM manufacturer to have a defined statement on this issue for more that
Electronics Forum | Tue Sep 20 23:12:38 EDT 2005 | darby
Several suggestions. Your hands may be tied but here goes. 1. Doctor your stencil so that pads are not shared etc and reduce the apertures more that what you would normally. This may stop one pad wetting into another etc. 2. The use of a Pb-free sol
Electronics Forum | Fri Sep 23 03:52:41 EDT 2005 | dougs
Hi, Does anyone know if it's possible to place BGA's with pitch 0.5mm and ball diameter 0.25mm on a siemens F3. the manual says that smallest pitch on BGA's is 0.56mm. Siemens won't commit a yes or no, as you'd expect, but i'd have thought it w
Electronics Forum | Wed Nov 02 08:16:31 EST 2005 | pavel_murtishev
Hi! It goes away only for one or two print strokes. After them the problem arises again. After first print stroke I inspect a lot of �dog ears� and a lot of paste not released from the stencil (it�s not a stencil design problem, other machine prints
Electronics Forum | Mon Nov 07 20:27:33 EST 2005 | davef
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Electronics Forum | Wed Nov 16 18:25:11 EST 2005 | Mike F
Check out the Unit Design web site and look at their drag soldering machines. You do not want to try to do any of this manually. How consistent are your operators when working above a 500 F solder pot? I strongly recommend you buy one of the books
Electronics Forum | Tue Nov 22 05:28:47 EST 2005 | Rob
Thanks, The supplier has sent us a number of responses, starting with it's compliant, then stating it's exempt, then telling us it should be fine. This has helped us to pursuade our customer to go to flash based memory, and hopefully solved the pro
Electronics Forum | Fri Nov 18 10:05:28 EST 2005 | lgroves
most pick and place machines will run for a very long time provided the operators keep them clean and well lubricated (10 years +). Often we end up replacing equipment not due to inoperability as much as due to capability. as packages and use chang
Electronics Forum | Mon Dec 05 15:51:18 EST 2005 | gregp
Hello SJ, We have a line of placement machines designed to suit your exact needs. Please visit our website and check out our C5 series placement machines. I would have contacted you directly if I could. Please email me if you have any questions. P
