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A New Stenciling Method for Reworking SMT Components

A New Stenciling Method for Reworking SMT Components

Stenciling MethodWhen reworking more complex SMT components such as finer pitch SMT components, SMTconnectors and even area array devices, the most common method of printing on the printing selectively on the PCB has some serious shortcomings. The most significant problems incurred with this method includes the lack of co planarity between the stencil and PCB, holding the stencil in position during the printing process, the large space taken up by the metal stencil/fixturing system and the cleaning required. These problems all lead to a decrease in yield.

A recently developed new stenciling process overcomes these deficiencies resulting in better yields, faster rework times all while simplifying the rework process.

Read Article...

Authors:

Bob Wettermann

Organizations:

Best, Inc

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Featured auction

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Aqueous Technologies Sonic One Stencil Cleaner

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Forum

Dewetting | Posted by Sean

Recently, we found the IC lead dewetting as shown in the attached file. This problem only happen on particular lead only. We checked our reflow profile and its look everything is fine... »»

SMT fall-out - acceptable rates | Posted by Reese

We are running SMT products and have been for some time now. First, I wanted to check with you folks to see what an acceptable FPY rate, or what you would consider and acceptable rate, is... »»

Line Capacity | Posted by namruht

I am working on some capacity issues and I have been reading some of the other treads, but I am still struggling with the idea of machine downtime... »»

Forum

DFT 501 - Advanced DFT Techniques

Online Webinar: | Fri, July 16 | Sponsored by: A.T.E. Solutions, Inc.

While Boundary Scan served the digital board test, a need exists to handle analog circuits, using IEEE-1149.4, AC coupled circuits using IEEE-1149.6, and JTAG approaches within the IC using IEEE-1149.7. In this webinar we explore these... »»

IPC A610 - Moving from Rev. "D" to Rev. "E" How Will it Impact Me?

Online Webinar | Wed, July 28 | Sponsored by: BEST Inc

BEST is offering a 45 minute webinar, held over the lunchtime hour, which will discuss the numerous significant changes instituted in the recent revision "E" of the IPC-A-610... »»

Troubleshooting SMT-BGA-BTC Yield Problems in Sn-Pb & Lead Free World

Online Webinar | Thu, July 22 | Sponsored by: SMTA

This webtorial focuses on three major areas of defects in SMT: design, assembly and the quality of incoming materials. We elaborate on defects related to in-coming material quality including surface finishes, and reflow and wave soldering... »»

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Industry Associations Events

SMTA

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: Ohio Valley Expo & Tech Forum - July 15


IPC

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: Online Webinar: Non-Destructive Profiling Methods - July 13


SMTnet Express
July 15, 2010

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