Electronics Forum: shrinkage (Page 1 of 5)

Smt component shrinkage

Electronics Forum | Fri Jan 04 11:16:02 EST 2002 | jsmith01

Does anyone have or know of a standard that deals with the shrinkage % of SMT components. One of my customers has asked for this to enter into their MRP system. I could make a guess but it would be nice to know if there is a standard to compare it

Smt component shrinkage

Electronics Forum | Fri Jan 04 13:10:07 EST 2002 | Dave G

Are they talking about size or qty ? Accountants sometimes refer to shrinkage when they are talking about inventory quantity discrepancies. Just asking, Don't know of a std that refers to this. Dave

Smt component shrinkage

Electronics Forum | Fri Jan 04 15:27:04 EST 2002 | davef

There is no standard. Component loss is a function of many factors, including: * Component type. * Component packaging. * Machine capabilities. * Feeder maintenance. Search the fine SMTnet Archives on attrit* for some guidelines.


Electronics Forum | Mon Sep 14 08:10:34 EDT 2015 | iamera

Hello Our production face a problem where our board after etching become shrinkage till 0.09mm but sometime it can be till 0.18mm. this happen after etching still the beginning of process not count for silver through hole and carbon process where th

Question of which bread pan to use when draining the wave solder pot?

Electronics Forum | Tue Oct 06 15:16:39 EDT 2020 | charliedci

More or less, some shrinkage occurs when cool.

Hot Tear / Shrink Hole--->Happen after wave soldering

Electronics Forum | Tue May 08 22:34:53 EDT 2007 | davef

Do you mean "how to solve or reduce this defect at wave soldering process" while continuing to use-up my SACX solder? If so, try: * Smaller solder volumes lower shrinkage hole / hot tears [Higher hole diameter versus pin diameter helps in reducing v

stencil to pcb manufacturing tolerance

Electronics Forum | Thu Oct 30 09:15:20 EDT 2008 | kingshar

Hi, Hi, 1) Can anyone tell be what is the acceptable manufacturing tolerance from stencil to PCB . 2) what are the methods we can avoid that. 3) What is the method to avoid PCB shrinkage. 4) How can we correct shrinkage 5)Is there any standard gud

Micro crack for lead free wave solder

Electronics Forum | Wed Aug 10 09:01:15 EDT 2005 | fctassembly

Hello Joseph, Sorry for the bad news but microcracking is a well known potential condition occuring with the SAC305 alloy. Microcracking is a condition being seen with many joints soldered with the SAC305 alloy. It is technically a shrinkage cavity

Micro crack for lead free wave solder

Electronics Forum | Tue Aug 02 22:49:55 EDT 2005 | davef

IPC-A-610D Section 5, shows a variety of photographs of: * Good lead-free solder connections * Lead-free soldering anomalies Hot Tear / Shrink Hole is one such anomaly. This shrinkage effect appears primarily on wave-soldered joints, but can also

Lead-Free Wave Defects

Electronics Forum | Tue Feb 07 13:01:52 EST 2006 | amol_kane

Hi, does anyone have any experience with common wave soldering defects using SAC305 alloy?.....i am finding a lot of what seem to be shrinkage cracks on the bottom side surface of the soldered components.....there is also a lot of directional cooling

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