Electronics Forum | Mon Dec 20 07:58:02 EST 1999 | pascal MATHIEU
hello guys ; we are using a fine pitch component(0.65mm) on a thick copper PCB (Cu = 90�m) ; in this case we notice that we are in the process'limits , because the different supplier of the PCB are not able to ensure a good stability of it's process
Electronics Forum | Thu Aug 20 13:01:40 EDT 2009 | bman
When I've seen white strands in the solder on SMT boards, it's been fibers from stencil wipes that stuck to the stencil, then transfered to the board when it was printed. I'm not sure why this would only happen with fine pitch components though.
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Industry News | 2017-09-05 14:08:01.0
KYZEN is pleased to announce that Dr. Mike Bixenman will conduct a special workshop during the SMTA International Technical Conference, scheduled to take place Sept. 17-21, 2017 at the Donald E. Stephens Convention Center in Rosemont, IL. The workshop, entitled “Characterization of Soldering Materials, Contaminants, Cleaning Processes and Process Control for Building Reliable Electronic Assemblies,” is scheduled to take place Monday, Sept. 18 from 1:30-5 p.m.
Industry News | 2013-06-26 09:09:19.0
The SMTA announced Harald Grumm from Christian Koenen GmbH as the recipient of the Best of Conference Award for his presentation “The Potential of Stencil Technology – Choosing the Right Stencil Options to Maximize Yield and Earnings” at the 9th Annual International Conference on Soldering and Reliability, held May 14-17, 2013 at the Sheraton Toronto Airport, Ontario, Canada.
Technical Library | 2010-03-23 11:50:22.0
This document discuss how to design SMT stencil base on IPC-7525. Introduction: PCBA (Printed Circuit Board Assembly) is a segment of printed circuit board technology. This segment of printed circuit board industry is concentrated in assemble all the pieces of electronic industry to one piece before output them to market. This segment covers: interconnection technology, package design technology, system integration technology, board and system test technology
Technical Library | 2015-12-31 15:19:28.0
Today's consumer electronic product are characterized by miniatuization, portability and light weight with high performance, especially for 3G mobile products. In the future more fine pitch CSPs (0.4mm) component will be required. However, the product reliability has been a big challenge with the fine pitch CSP. Firstly, the fine pitch CSPs are with smaller solder balls of 0.25mm diameter or even smaller. The small solder ball and pad size do weaken the solder connection and the adhesion of the pad and substrate, thus the pad will peel off easily from the PCB substrate. In addition, miniature solder joint reduce the strength during mechanical vibration, thermal shock, fatigue failure, etc. Secondly, applying sufficient solder paste evenly on the small pad of the CSP is difficult because stencil opening is only 0.25mm or less. This issue can be solved using the high end type of stencil such as Electroforming which will increase the cost.
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