Electronics Forum | Thu Sep 02 18:39:48 EDT 2004 | steveg
We're having a lot of problems with failed solder joints to gold-plated MOSFET leads. Gold plate thickness spec is 60uin, but we've seen as much as 200uin in cross-section, so we're obviously concerned about gold embrittlement issues. Pre-tinning w
Electronics Forum | Sat Aug 04 08:09:03 EDT 2007 | rich7799
I found the problem... the vx cable trunking was the wrong radius, so when the axis was moving at slower speeds to read pre stop position, the axis was not reading the platen correctly due to extra downward force.. Ive now replaced the trunking and
Electronics Forum | Wed Aug 24 03:17:21 EDT 2011 | richieoreilly
Hi, Thanks for the info. The current process is a standard SMT hand soldering process. The time does not include cleaning, prepping and pre-tinning. Its just the time for the re-flow of one joint itself. We are waiting on some new tips to experimen
Electronics Forum | Fri Jun 23 12:54:53 EDT 2017 | guts1872
We are having issues with top fill and dropping pins on Molex connectors with our KISS 101. Unfortunately we do not have a pre heater and bottom side pre heat with our nozzles is not satisfactory. Most of the issues occur when using a no clean proces
Electronics Forum | Thu Oct 26 13:56:08 EDT 2000 | ptvianc
Hello: Pre-baking laminates should only be performed:(1) to meet contractual agreements or (2) in response to an actual defect that can be traced to PWB water absortion. Besides the fact that a pre-bake is an enormous process "bottleneck," it also
Electronics Forum | Wed Apr 08 14:46:34 EDT 2009 | boardhouse
The things to ask your board supplier would be: 1) Was the Pre-preg material that was used on this board within its Shelf life? and ask for the Incoming inspection CofC for the Pre-preg material. 2)Was this order shipped from Stock - this is why
Electronics Forum | Mon Feb 28 20:17:02 EST 2000 | Eldon Sanders
I need to side mount a standard HC-49/U crystal on a board using double sided foam tape. I am looking for a source for pre-cut foam tape. In prototype runs I have used 3M #4950 foam tape cut to size one at a time. But for production I want it pre-
Electronics Forum | Mon Feb 28 20:17:02 EST 2000 | Eldon Sanders
I need to side mount a standard HC-49/U crystal on a board using double sided foam tape. I am looking for a source for pre-cut foam tape. In prototype runs I have used 3M #4950 foam tape cut to size one at a time. But for production I want it pre-
Electronics Forum | Thu Jan 27 14:49:53 EST 2000 | Glenn Robertson
Tuan - One of the reasons I suggested pre-tinning (aside from the negative effects of Gold on appearance and reliability) is the known slower wetting of Sn/Ag and Sn/Cu alloys as compared to Sn/Pb. If you don't have to be Lead-free, the high Lead
Electronics Forum | Mon Mar 08 16:06:36 EST 1999 | Dave F
| | A recent thread ... | | | | Pre-heat for Ceramic Capacitors - Igmar 10:21:55 03/04/1999 | | | | ... was addressing something that was discussed in an earlier thread. I searched 'til I was ARRRRRRHHHH! without finding the earlier thread. The w
