Electronics Forum: cfm (Page 1506 of 7890)

36PB/62Sn/2Ag Vs 63Sn/37Pb

Electronics Forum | Thu Aug 16 19:58:49 EDT 2001 | davef

Just feel relieved that we didn't go to the matt on the use of "leaching" rather than "dissolution". And you thought this was easy, eh?

Solder Beads

Electronics Forum | Wed Aug 15 01:46:43 EDT 2001 | Pavel

Hi, could any body tell me the reason for solder beads apperance and how to aliminate them (solder beads are solder balls that are found along chip body). Thanks,

Solder Beads

Electronics Forum | Wed Aug 15 08:16:29 EDT 2001 | wbu

Hi Pavel, what you see is most probably caused by to much solder. There�re plenty of hints to avoid this in the archives, just use the "search" function and look for "solder beads" and "solder balls". That will bring you on the right track. Good lu

Solder Beads

Electronics Forum | Wed Aug 22 17:29:29 EDT 2001 | Michael

We've found beading is not neccesarily the amount of paste but where it's applied. Trapping paste under components seems to be the culprit. On components where we couldn't reduce aperature size we simply moved it outward actually overprinting the p

Pull Test

Electronics Forum | Wed Aug 15 12:59:26 EDT 2001 | upinder

Hi All. I am looking for a typical Pull Test Results for the adherence of 0402 / 0603 components to the pads. Thanks USingh

Solder paste normalisation period

Electronics Forum | Sun Aug 19 09:27:09 EDT 2001 | davef

Yano, imalookinat two vendor specification sheets that say your paste should sit around at "print temperature" for 1 to 6 hours before printing [er, words to that effect]. Werejallgit this 6 hours stuff from?

Solder paste normalisation period

Electronics Forum | Tue Aug 21 09:33:33 EDT 2001 | nifhail

6 hours is just the figure I plugged from the sky. U-no-whak, this company used to follow 8 hours religiously in the past..scary huh!!! thanx..

Solder paste normalisation period - Baking Entek

Electronics Forum | Thu Aug 23 01:16:53 EDT 2001 | mugen

Hello... that last paragraph reply, makes one sound like, Dilbert De Engineer..... Beware the pointy haired guy...

Placing 0201 parts with Fuji CP642

Electronics Forum | Thu Aug 16 08:08:11 EDT 2001 | forrge

Looking for feedback from people that used the Fuji CP6 to place 0201 parts. Is the CP642 reliable? I have been told that the Fuji CP642 cannot reliably place the 0201's and the CP643 must be used.

Placing 0201 parts with Fuji CP642

Electronics Forum | Fri Feb 15 15:50:55 EST 2002 | Bruce

The CP-642 simply requires a camera upgrade for 0201 parts. This is the same camera as is used on the CP-643. You should then get identical results


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