Electronics Forum | Sat Jun 11 07:24:26 EDT 2005 | buchi79
Russ, Thanks.By the way, i already look into the reflow profile & paste storage & thowing requirement. Even i cut down the stencil life to 4 hr to avoid any moisture absorbtion. If i were to change the paste formulation, what would you propose ? But
Electronics Forum | Fri Jun 17 11:08:37 EDT 2005 | Stefan
The inner light ring creates a direct light to the fiducial. If you deal with a very shiny fiducial (or board) the light will reflect into the lense, create white spots in the camera CCD chip and make the fiducial shape un-readable. Use the outer li
Electronics Forum | Wed Jul 13 14:56:53 EDT 2005 | jdengler
I read the Cookson/Alpha paper "Optimizing stencil design for Lead-free SMT processing". I interpreted it to mean that if you had a mid chip solder ball (MCSB) problem the "radiused inverted home plate of 20/60/20 style" had the greatest impact on r
Electronics Forum | Tue Jul 19 19:10:18 EDT 2005 | chocw
Most of the major chip mounter makers claim that they do have a capability of handling 01005. Like Samsung, Yamaha, Assembleon, Panasonic, etc. But I've never found any screen printer company yet. What is the specification required for selecting scre
Electronics Forum | Tue Aug 02 11:58:44 EDT 2005 | GS
Are the pick up nozzles metal made (ironmagnetic material)? Some time magnetic residual on metal nozzles can generate pbm like that when chips terminations have nickel and when SOt or similar packages have terminal A42 alloy made. Time ago got pbm l
Electronics Forum | Fri Oct 14 16:43:56 EDT 2005 | Denis
Hi, I think I'll try to do it on my own. There's a company here that does this stuff, called Car-San, but the want to charge me $100 Canadian to do one chip on one board. Min order, I guess. I think they were just trying to shoe me away. So, I bo
Electronics Forum | Fri Sep 16 12:58:49 EDT 2005 | vikkaraja
Fuji sells a PAM kit. It includes all the needed things you will need to accomplish this. It has a reel of 1206 black colored chips, doule sided tape, PCB, flopy with PAM program , and a ram card for the particular machine. I hope it help you some. G
Electronics Forum | Fri Sep 23 04:38:34 EDT 2005 | Rob
Hi, We used the 1 mil for 0402's etc. Admittedly most of our experience was on 2.6 & 4 mil as we mainly used the GSM's for oddform & fine pitch, but we found that the smaller chips went down better & more accurately with the smaller camera. Oh yeah
Electronics Forum | Sun Oct 09 08:15:12 EDT 2005 | davef
Properly grounding employees and work surfaces is the single most effective method of reducing esd damage to parts. Tell us about your ESD control program and how well it conforms to ANSI/ESD S20.20-1999, Electrostatic Discharge Control Program Stan
Electronics Forum | Wed Oct 26 11:51:06 EDT 2005 | moonshine
Don't V score, unless you absolutely have concurrence with your QUALIFIED fab and assembly operations. Routing is best for all chip devices close to board edge. It's better and cleaner for everything when seeking quality and reliability. Visit htt
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