Electronics Forum | Fri Feb 24 13:39:35 EST 2006 | Chunks
I agree with Jerry. A 7 mil stencil should work just fine for 25 mil pitch parts and 0.050 pitch BGA's. I too go 6 mil, but whith proper screen printing, you can 7 mil. You can always do 5 ot 10% reductions if needed. Use the homeplate design on
Electronics Forum | Thu Mar 23 07:36:42 EST 2006 | Chunks
According to the original article, no. It is formed by the FR4 expanding and then contracting. So cooling it down faster would not help - in theory. We have not gone lead free yet, so take the above with a grain of WML. My question to those that
Electronics Forum | Wed Mar 29 13:43:42 EST 2006 | Wave Master Larry
LISTEN thats the problem with the engineers.The engineers at my place of employment always crack that "engineering humor" too and i hate it.Hell Edison had no formal education. I liken myself to Thomas Edison no formal education but lots of practica
Electronics Forum | Thu Mar 30 07:54:58 EST 2006 | Wave Master Larry
LIsten I'll have to diagree with you there.Now Im not the biggest expert at screen printing at my place of employment its a different department than wave which is my primary expertice but I see those UP20000 printers are always down with problems.
Electronics Forum | Wed Apr 26 10:56:13 EDT 2006 | JEM
Mydata sales for TPSys 2.4 says and i quote" Reduce your setup and changeover times with new features like the ability to use auto teach for vision illumination, barcode loading of trays, factory wide sharing of vision package data.TPSys 2.4 contains
Electronics Forum | Mon May 22 18:19:29 EDT 2006 | Steve
I have read some threads about poor wetting on palladium-silver (Pd-Ag) coated components. I followed the suggestions, but I am still having a problem. The part is an 0603 chip type (Vishay varistor). The Process: solder paste is lead-free Alpha Met
Electronics Forum | Tue May 23 14:08:56 EDT 2006 | bman
We've been placing BGAs for a while now, and I personally had to x-ray every one of them. The only time we had a placement problem was when a few parts were placed by machine in the wrong orientation. The operators fixed it by hand before it went t
Electronics Forum | Sat May 27 17:21:43 EDT 2006 | smt_guru
Efren, Allow me to make some recommendations. This is my firm's bread and butter, so to speak. Helping startups like yourself achieve their budget objectives, but in the process being innovative and thinking outside of the box. Here are my sugges
Electronics Forum | Fri Jun 16 15:05:29 EDT 2006 | grantp
Hi, We ran some boards and the girl on the line put in some Pb BGA's instead of using RoHS parts. This should not have happened as we have almost no Pb parts left, and we spray painted Pb parts fluorescent pink so it was obvious. The boards seem t
Electronics Forum | Tue Jun 20 14:58:22 EDT 2006 | smt_guru
Allow me to make some recommendations. This is my firm's bread and butter, so to speak. Helping startups like yourself achieve their budget objectives, but in the process being innovative and thinking outside of the box. Here are my suggestions----
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