Electronics Forum | Fri Sep 28 16:49:48 EDT 2007 | davef
good * No IMC => bad Intermetallic growths are diffusion limited, and therefore the thickness of the intermetallic is given by: z^2 = (Do)(t)exp[-Q/RT] Where Do (m^2 s-1) is the diffusion coefficient, T(�K) is the temperature, Q (J mol-1) is the act
Electronics Forum | Tue Oct 16 17:55:39 EDT 2007 | jmelson
Geez, what a great company! Somebody paid them $100K for that machine, now you have to pay up front just to find out if they have a part IN STOCK???? That's pretty shocking! You may just have to take the bearing off the machine. I'd guess it is a
Electronics Forum | Thu Oct 18 00:37:22 EDT 2007 | deyuan
This posting is for a group of students at the University of California - Los Angeles Anderson School of Business. We are conducting a survey for our Master�s thesis project. Our project involves working with a small electrical CAD software company
Electronics Forum | Thu Oct 18 00:39:22 EDT 2007 | deyuan
This posting is for a group of students at the University of California - Los Angeles Anderson School of Business. We are conducting a survey for our Master�s thesis project. Our project involves working with a small electrical CAD software company
Electronics Forum | Tue Nov 13 14:11:26 EST 2007 | ratsalad
We use SAC305 for solder paste, and we have been pretty happy with it. When we jumped in to this Pb-free business I was a little nervous due to all the horror stories you hear about the process changes. It's not that big of a deal (at SMT). Over
Electronics Forum | Wed Nov 07 14:41:49 EST 2007 | mainenetservices
We are looking into what equipment would be necessary assemble circuit boards. We will most likely purchase a circuit board and use a pick and place machine to populate the board, and then send through a reflow oven. Then inspect the boards and ass
Electronics Forum | Mon Nov 12 12:00:59 EST 2007 | wayne123
A philips Topaz is a good machine, I have accurately placed 0402's without a problem, Fine pitch QFP no problem, BGA's not a problem, I am not familiar with the TP9 so hopefully the other guy can answere questions on that, The Topaz is rated at about
Electronics Forum | Tue Nov 20 20:26:54 EST 2007 | davef
Peter: The above link to the the picture of the assembly is broken. Comments are: * Yes, RTV is completely useless for applications like you describe. Epoxy is a much better choice. * Dave G, in an archived thread on SMTnet, talks about using 3M Jet
Electronics Forum | Wed Nov 28 01:28:32 EST 2007 | shy
Q1:What is the relation between component standoff and drop missing? A1:component standoff will identify either solder paste at SMT side can form the fillet at component terminal or not. Drop/missing component is totally out of the topics since i jus
Electronics Forum | Mon Dec 17 19:01:45 EST 2007 | bbarton
As someone with a LOT of experience with the "low cost" alternative alloys, primarily SACX, I have one simple question....Are these shorts a new phenomena? WAS your process in control, and all of a sudden it's not? If the answer is YES, take a look a
