Electronics Forum | Thu May 26 07:50:33 EDT 2011 | scottp
What process steps have been completed before the cross-section? What type of devices have solder cracks? Are the cracks found after just normal processing or after some type of validation testing? It is very unlikely to be a heating/cooling issue
Electronics Forum | Tue May 31 22:40:24 EDT 2011 | bejrananda
HI All, Please kindly advice me, I have project that it has DPAK part (MPN:SUD25N15-52 E3 Plating:100% Sn matte)which locate on bottom side (1st reflow), Good wetting for 1st reflow.. but .. when I run Top side (2nd reflow).I found that this D
Electronics Forum | Wed Jun 01 15:50:59 EDT 2011 | markhoch
I don't believe that particle size of the solderpaste will offer you any relief from this issue. The solder flows into the via, leeching away from the desired solderpoint, after the solder has become liquious. The chemical make-up of the solder contr
Electronics Forum | Thu Jun 02 10:54:12 EDT 2011 | davef
Al: We agree with AVFOM. You have a different problem than solder paste mesh selection. Most often, tombstoning occurs when the wetting forces on the two pads are unequal. Examples of things that can cause this are: * Pads are different * Board pad
Electronics Forum | Tue Jun 14 17:32:44 EDT 2011 | davef
It depends on the flux and the down-stream processing ... * If there is adequate down-stream cleaning: We are ambivalent. * If the flux is low residue and there in no down-stream cleaning: We don't like using a syringe because it squirts liquid flux
Electronics Forum | Tue Jun 21 15:55:23 EDT 2011 | michael4575
I'm Currently looking for any and all viable options for recycling SMT reels and all associated plastics. Several years ago SemiCycle supported all 3 packaging types, but currently only supports trays. Several vendors will support tray recycling, bu
Electronics Forum | smt1000 |
Fri Jun 24 13:56:39 EDT 2011
Electronics Forum | Wed Jun 29 14:27:07 EDT 2011 | wrongway
Hello all I have used a couple of types one of them only clamped on two sides and you used a wrench and screwed the bolt down till it was tight ( what is tight) and there was no fram at all around the stencil so people got cut. the second one we us
Electronics Forum | Mon Jul 11 09:24:33 EDT 2011 | kahrpr
You need to check some other stencil places all the ones I deal with, Turn them around same day if I get the files early enough. Also i have a California stencil house which gives me 3 extra hours (east coast guy)I only pay extra for the shipping. Th
Electronics Forum | Mon Feb 20 20:28:04 EST 2012 | acsscott
Have you done any more work on this? I have a program that reads the Altium files, a feeder database,and makes a UFOS file for the older CSM machines. I can't get the UFOS to VIOS convertor on our Topaz X to read the UFOS *.BRD files. It stops and
