Electronics Forum | Tue Jun 20 02:51:52 EDT 2000 | Leland Woodall
Gary, We've experienced the same problem in the past, and found that moving the stencil apertures closer together solved the dilemma. This was a much easier solution than having to redesign the PWB. Leland
Electronics Forum | Mon Sep 11 04:10:46 EDT 2000 | Jim Arnold
I spent 25 years operating my own hybrid shop working with surface mount components, soldering materials and procedures. Dealing all the while with it's associated surprises and problems such as yours. Now-a-days I get paid to investigate and attemp
Electronics Forum | Fri Aug 25 00:15:15 EDT 2000 | Wilson
Hi all, Does anybody meet large size of tape cavity in 0603 components? It is a serious problem in some vendors that their tape tolerance is very large. It lead to our fallout rate abnormal high. What is standard tape cavity size? Why the componen
Electronics Forum | Wed Dec 22 05:42:19 EST 1999 | Wolfgang Busko
Hi John, I�ve seen problems some sites have or had with bridging problems in the wavesolder process with 1206 and 0805. Adjusting the system and focussing on the flux parameters sometimes improved things. With some older systems it was hard to get s
Electronics Forum | Thu Jan 09 10:47:36 EST 2003 | Hussman
Depends on what you mean by shifting towards each other. Otherwise, 7 mil should be fine for 0603. I've used 6mil, 7mil and 8 mil without problems. Generally, stencil thickness won't have a bearing on "shifting" parts. Check placement. Make su
Electronics Forum | Mon Sep 11 04:23:49 EDT 2000 | Wolfgang Busko
Adam: I would say that you do have a reliability problem. - check parts for solderability - check your board finish - check your profiles - check your paste - check your processes with focus on cleanliness - do some mechanical tests, you should rath
Electronics Forum | Fri Jan 03 11:42:38 EST 2003 | soupatech
Hi, I am loading a new board with mostly 0603 packages. The pads are .5 mm apart and I am having a big problem with parts shifting towards eachother instead of centering on the pads. I believe this is caused by too much solder. I am using a 7mil sten
Electronics Forum | Tue Dec 21 19:48:27 EST 1999 | Russ
John, we have waved 0603 packages for a long time, We have also started on 0402. Are you concerned with shorting across the component body or to other components? You should have no problems with these parts in a wave process. A couple of things
Electronics Forum | Wed Feb 23 19:04:19 EST 2000 | Jason Nipper
Hi Mike, I have had problems in the past that were very difficult to determine the source of. Our tombstoning issues were caused by the plating on the part itself. If your smd placement, x-y positioning and placement pressure is not an issue, and
Electronics Forum | Wed Feb 23 21:37:31 EST 2000 | Morris
Michael: I would agree with Jason. It seems your analysis has pointed you to one specific brand of part. I've also seen this phenomenon. The part was Palladium plated and when we switched to a nickel/tin plated part, the problem went away. Some o
