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SMTnet Express July 3, 2013, Subscribers: 26124, Members: Companies: 13413, Users: 34866

Performance of Kapton Stencils vs Stainless Steel Stencils for Prototype Printing Volumes Processes

by Bob Wettermann, Hung Hoang; BEST Inc

It has been demonstrated in numerous pieces of work that stencil printing, one of the most complex PCB assembly processes, is one of the largest contributors to defects (Revelino et el). This complexity extends to prototype builds where a small number of boards need to be assembled quickly and reliably.

Stencil printing is becoming increasingly challenging as packages shrink in size, increase in lead count and require closer lead spacing (finer pitch). Prototype SMT assembly can be further divided between industrial and commercial work and the DIYer, hobbyist or researcher groups. This second group is highly price sensitive when it comes to the materials used for the board assembly as their funds are sourced from personal or research monies as opposed to company funds. This has led to development of a lower cost SMT printing stencil made from plastic film as opposed to the more traditional stainless steel stencil used by industrial and commercial users.

This study compares the performance of these two traditional materials and their respective impact on solder paste printing including efficiency and print quality.

read article »

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SEMICON West 2013
July 9

Cleaning Process Control - Free Online Webinar
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Jobs:

Electronic Assembler

Appleton, WI, USA | Surface Mount Technology Corp.

Field Service Technician/Engineer

San Jose, CA, USA | ASM Assembly Systems

Manufacturing Test Engineer

Fremont, CA, USA | Unigen Corporation

Resumes:

Customer Service Engineer

Suzhou, China

Security Systems Engineer

Trivandrum, India

Accounting & Payroll Administrator

Surrey, BC, Canada

Industry Associations Events

SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies. Membership Info | SMTA Certification | Bookstore

Next Event: Webinar: PoP Applications, Requirements, Infrastructure and Technologies - July 16

IPC - Association Connecting Electronics Industries is a US-based trade association dedicated to the competitive excellence and financial success of its nearly 2,600 member companies which represent all facets of the electronic interconnection industry, including design, printed wiring board manufacturing and electronics assembly. Membership Info | Training & Certification Programs | Standards & Publications - Online Store

Next Event: IPC APEX India - August 27 - 29

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Newsletter Editor - Anna Girouard

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