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Bill Coleman Member No. 40912
Vice President Technology
Photo Stencil
bcoleman@photostencil.com

imageFor over 18 years, Dr. Coleman has been the vice president of technology for Photo Stencil, working closely with customers to understand their printing requirements. His efforts have resulted in several new stencil products such as trapezoidal chem-etch apertures, wafer bumping stencils and DuraGlide squeegee blades.

Experts Questions Answered by Bill Coleman
Aug 4, 2008 Reflow BGA's with CSP's
Jul 21, 2008 BGA Rework
May 12, 2008 Solder bridging on BGA's
Mar 3, 2008 Type IV solder paste on 0201
Dec 3, 2007 Part Movement During Reflow
Sep 17, 2007 BGA Rework - with or without solder paste
Jul 16, 2007 SMT adhesive problems after wave solder process
Jul 2, 2007 BGA re-balling process
Jun 18, 2007 Tombstone problems
Jun 4, 2007 Stencil printing process problems
Apr 30, 2007 Through-hole ratios for PCB's
Mar 4, 2007 Lead-free bar solder for wave soldering
Feb 4, 2007 Screen printing QNF24 problem
Jan 29, 2007 Lead-free soldering problem
Sep 25, 2006 0201 capacitors creating process problem
Sep 11, 2006 Reflow of "high-lead" flip chip device
Aug 21, 2006 Problems with solder paste stencils
Jul 10, 2006 Can we convert our existing wave soldering machine to use lead free?
May 10, 2006 Problems with defect BGA connections on large BGA's and on ENIG plated boards
Apr 13, 2006 Advise and suggestions for assembly using 01005 capacitors.


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