Electronics Forum | Mon Jul 29 08:28:05 EDT 2002 | pjc
Start killing DEK now, on the ELA. All DEK 248 semi-auto printers have been built in China for quite some time (years). Its shipped to the UK from China. All DEK ELA models are now built in China, since 01 some time. Thats the fact Jack. All MPM mod
Electronics Forum | Sat Jul 27 10:17:33 EDT 2002 | sam_b
Hello, I am looking into purchasing a rework system for BGA's. Contacted several manufacturers, both large and small, all seemed desperate to sell their stuff. I would need to be locked up in a nut house should I base my purchasing decision on the
Electronics Forum | Tue Jul 30 08:38:55 EDT 2002 | dasal
Truthfully, there are pro's and con's for both technologies. (put cost of ownership aside for one moment) Nitrogen won't dry humidified components as rapidly as a desiccant dry box. I'm talking about a self regenerating dry box that uses molecular s
Electronics Forum | Mon Jul 29 18:53:17 EDT 2002 | davef
For MCM, hybrid, thick film er whatever they call them nowa days: * Aimtronics [ http://www.aimtronics.com/micro_thickfilm.htm ] * ISSI [ http://www.internationalsensor.com/HYBRID_PAGE_HTML/HYBRID_PAGE.htm ] * Vetronix Research 1700 Harmon Rd Auburn
Electronics Forum | Tue Jul 30 08:37:39 EDT 2002 | davef
When you talk about 'poor wetting', 'dewett', 'no wets', etc.; are you seeing solder pulling back or away from the pad? Please describe the condition. Dewetting. The condition in the solder joint in which the liquid solder has not adhered intimate
Electronics Forum | Tue Jul 30 17:47:50 EDT 2002 | davef
Dewetting: Solder does not adhere to lead or land, caused by: * Poor solderability of lands. * Poor solderability of leads. * Solder paste integrity. * Lead plating integrity. Need more information, please: * What is dewetting [ie, component, pad, e
Electronics Forum | Tue Jul 30 17:51:18 EDT 2002 | davef
Comments are: * Peak at 245�C for 40 sec seems like a very long time. I�d expect the time at 245�C to be 10 to 15 sec. This long time at peak could dewett the pads. * Really, their 2D vision on the printer can verify solder presence? * A thin coat
Electronics Forum | Wed Jul 31 08:23:49 EDT 2002 | mcm4me
221C). 2D vision can very effectively detect % pad coverage, I use it on my DEK and this customer has an MPM which I also believe to be capable. Here is another fact, when the customer uses Brand X solder paste the defects due to what they call pad
Electronics Forum | Wed Jul 31 17:25:39 EDT 2002 | sueph
Dave, thanks for the reply. These boards have metal plating covering 99 percent of both primary and secondary surfaces. The only places without the metal plating are the extreme outer edges and about an 1/8 inch surrounding the plated holes. We do
Electronics Forum | Fri Aug 02 11:48:23 EDT 2002 | johnw
I can't think of any off hand other than the Ersa which is massive and from when I used it a pain in the A*SE to program and keep programmed, you always seem to have to baby sit it. I bet if you asked you could get one, the problem is that forced con
