Electronics Forum | Thu Feb 17 11:38:53 EST 2000 | Steve Thomas
We appear to have solved a major reflow process problem (poor quality joints on a 20 mil QFP100...excessive solder left on the lead leg, not much left for a joint) with a design change to the board. We gave ourselves considerably more room for a hee
Electronics Forum | Wed Feb 16 15:29:15 EST 2000 | John S.
My company manufactures electronic modules for the automotive industry. We have a current product that the customer would like a "heavy duty" version of. The module will have to handle roughly twice as much power as the original. A couple of compo
Electronics Forum | Tue Feb 15 11:48:30 EST 2000 | Steve Thomas
Thanks for your responses, gentlemen. I'm really just looking at options, and frankly, being a novice at this stuff I'm looking for the info. required to make a semi educated decision. You, kind sirs, are my educators. And that probably scares m
Electronics Forum | Fri Jan 12 16:35:00 EST 2001 | Steve Thomas
I've got a question: Can a joint look good externally, even under 45X magnification, and not be mechanically and/or electrically sound? I thought that if the wetting angles were sufficient, there's no discoloration from extreme thermal distress, or
Electronics Forum | Fri Jan 05 13:40:04 EST 2001 | Steve Thomas
Is my employer living in a vacuum? Are we the only ones doing this? I can't find anything in the archives on this topic, so forgive me if it's been hashed over before. Our major chip supplier is giving us less than a year to convert our products o
Electronics Forum | Mon Jan 08 17:46:38 EST 2001 | Mark Krmpotich
Panasonics are good machines as long as you do the proper and timely PM's they recommend. Plus with my past history and from others that I here, their feeders are some of their biggest down fall. That's typically why they have to introduce new style
Electronics Forum | Fri Dec 22 16:58:38 EST 2000 | LarryK
Lee, Cal is correct in that Jafco makes the fingers you described. If i remember correctly, they were located in Texas. I had them on an Electrovert in my previous employer. They were about 50% of the cost of the Titaniums. They had their good and ba
Electronics Forum | Thu Nov 30 23:48:16 EST 2000 | DL
Dave, Thanks for the input. I cant beleive I didnt think to check the suppliers web site, I feel like an... well anyhow. The leads I'm referring to are place at a 90 degree angle from the edge of the pcb and extend towards the bottom as opposed to
Electronics Forum | Tue Nov 14 13:39:37 EST 2000 | Mark S
Hi All -- I'm about to design a DPAK part (case 369A-13, Issue Z)onto a PCB . The part's maximum length as given in the datasheets (On-Semi MAC4DHM) is 0.030" longer than the recommended land pattern as given in that same datasheet. (1) Has anybod
Electronics Forum | Mon Nov 13 08:24:03 EST 2000 | G. English
Richard, From your description of the IC, as Wolfgang indicates it sounds like a 20mil pitch device, the aperture design really depends upon your solder paste particle size, we use a type 3 solder paste with a mesh size of �325 / +500microns. This is
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