Electronics Forum | Thu Nov 01 15:14:47 EST 2001 | jacob
Hello, I am trying to convince our design engineer to use micro-vias when he has to locate them in the middle of a pad. I heard of the use of micro-vias on this site and was wondering if someone could lead me in the direction of somewhere
Electronics Forum | Sat Nov 03 05:41:07 EST 2001 | Ben
Hi Could somesomeone help to let me know can bare PCB (FR4) is damaged by thermal shock? Can difference of CTE from copper or solder to FR4 damage PCB from apply heat too fast? Any specification or standard can i refer? Thank you Ben
Electronics Forum | Mon Nov 12 16:10:46 EST 2001 | davef
There is no doubt that we reflowed topside BGA on our wave solder machine. We run our wave pot at 450�F and that�s plenty hot enough to reflow solder on topside SMT components. When the solder balls on the BGA melt, the package is over 200�C, trust
Electronics Forum | Wed Nov 07 10:59:55 EST 2001 | paulburt
Hello all, I have been tasked with bringing my company up to spec with J-STD-033, yes lucky me! My question is this: While I was searching the Web for suitable suppliers of dry cabinets I came across a company advertising a humidity control system f
Electronics Forum | Wed Nov 07 17:06:56 EST 2001 | davef
Most of us, here on SMTnet, are either assemblers or sale types. Assemblers use stencils [metal foil, secured in a frame] instead of silk screens. Fabricators use silk screens in various photoimaging processes for applying etch resists, solder mask
Electronics Forum | Wed Nov 07 13:57:41 EST 2001 | Cory
I have been tasked with trying to find out how to do a basic to difficult quote for a job to be manufactured either in a oem or cem. Can or does anyone have any info that could help me get this adventure off the ground?? Is there an easy template or
Electronics Forum | Fri Nov 09 20:15:26 EST 2001 | caldon
I concur with Dave.....I have done this often with little fall out. After rework reflow we would x-ray just to ensure an acceptable joint structure. Just for curiosity sakes....are you removing a defective BGA and replacing with a good one? Site pre
Electronics Forum | Mon Nov 12 08:42:59 EST 2001 | madreindeer
HI, I would say around 80Kv 5-8um focalspot should be OK. Check systems like CR Technology,Phoenix,FeinFocus these are nice systems. There is low cost system Glenbrook any good I do not know. Good luck, MadReindeer
Electronics Forum | Mon Nov 12 11:05:43 EST 2001 | vbutani
You can get systems at various performance levels depending on your budget. The low cost systems are a great way to start off and then you can upgrade to a higher performance unit when you move to finer pitch components. Check out the VJ-1000LP at h
Electronics Forum | Wed Nov 14 10:23:51 EST 2001 | gzweig
This question and other issues on x-ray inspection of BGAs are addressed in the free PDF. publication available by e-mail entitled: Rapid and Effective X-ray Inspection of BGAs using "Signature Identification" Just place "send publication" in subj
