Electronics Forum | Fri Oct 20 10:15:13 EDT 2006 | wrongway
mid chip solder balls we had that trouble for awhile we went from a 8 mil thick stencil to 6 mil stencil and did some home plate style of cut outs in the stencil for the 1206 caps and resistors it seemed to fix our mid chip solder balls
Electronics Forum | Thu Jul 17 15:12:18 EDT 2008 | slthomas
To quote a regular here, "Are you sure your washer is set up correctly?" :P He's a WS junkie. This is a really common problem and is discussed here often. Mid chip solder balls (solder beads) are almost always the result of too much paste being dep
Electronics Forum | Fri Jan 14 16:21:42 EST 2000 | Dave Chapman
We are having mid chip solder balls on chips and resistors. Seeing the problem on 80% of the assemblies we run. Anywhere from 1 to six of the balls per board. We have slowed the oven down, increased the pressure on the screenprinter to get less paste
Electronics Forum | Mon Sep 19 01:57:28 EDT 2016 | shriram
Hi guys, Problem: Mid chip solder balling. Component affected: 0603 caps only Defect is PCB specific (Meaning only one PCB is affected as the aperture is standard for that component). As a containment I'll give a home plate design for the compo
Electronics Forum | Fri Mar 25 04:28:54 EDT 2011 | grahamcooper22
Are the solder balls what we would call ' mid chip ' solder balls where a single or sometimes a few larger solder balls are positioned somewhere along the side of the chip or are they the solder paste powder particles spread around the pads ?
Electronics Forum | Fri Oct 20 07:03:46 EDT 2006 | sliebl
I really appreciate the input, guys. Having only had the opportunity to run the Contact machines, I was not aware that many of the other machines use coordinates for locals. Now about those damn, mid-chip solder balls.... oh, that's another topic.
Electronics Forum | Thu Aug 19 05:19:31 EDT 2010 | grahamcooper22
I have seen that moisture in pcbs will cause mid chip solder balls. To discount this, take one pcb from a batch that is giving you solder balls and pass it through you reflow oven with no paste or components on (bare pcb)using your normal reflow prof