Electronics Forum | Tue Jul 31 22:42:41 EDT 2001 | chip
In the past I have spoken to Multitronics sales reps and looked into the product line. I saw their equipment more suited for a smaller "mom and pop" type shop, I work for a mid size contract house and it wouldn't have come close to meeting my needs.
Electronics Forum | Fri Sep 07 14:51:36 EDT 2001 | Claude Couture
What kind/brand of machine are we talking about? Are the missing parts randomly distributed or are specific to a feeder/placement/pattern? Does your machine remember where to resume placement if you reset it in the middle of a pattern placement? We h
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 | Tue Jul 15 15:46:05 EDT 2008 | slthomas
Can you describe your solder balls...mid-chip solder balls, "splatter" around pads, etc.?
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 | Fri Jan 21 10:40:15 EST 2000 | Dave Chapman
Having adjusted the profile speed slower and adjusting the temps to the recommended lower levels, amazingly the mid chips have almost disapeared (90%). It appears they have been trying to run a "1 profile fits all" on the ovens for Alpha 737 and UP78
Electronics Forum | Thu Jul 19 08:00:03 EDT 2001 | doctord
Solder balls or mid chip beads? Remember IPC classification for Class 2 allows mid chip beads encapsulated in flux. Usually on R's and C's first thing I would do is verify .006 laser stencil 10% reduction and the most critical, The paste must be on t
Electronics Forum | Wed Jul 25 11:55:21 EDT 2007 | ck_the_flip
Zoinks!! Doing the homeplate design on 0402 will actually make your tombstones WORSE! Think about it. Your wetting forces are now on the ENDS of the device with no solder paste toward the middle of the device to tack the part down - a gauranteed f
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 | 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
