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Developing a Reliable Lead-free SMT Assembly Process

Featured Article

Developing a Reliable Lead-free SMT Assembly Process

What are the key process requirements to achieve reliable lead-free SMT assembly?

Lead-free SMT can be achieved reliably if several process requirements are implemented carefully. Some of the variables to account for are listed below. The most common alloys used in lead-free SMT are tin-silver-copper alloys; these alloys all have a meting range between 217-220�C. These alloys all melt at higher temperatures than traditional leaded solders such as the 63/37which has a melting point of 183�C.

Credit/Source: Peter Biocca, Senior Development Engineer    Kester, Inc.


Featured Auction
MY-Series Extended

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All-in-one machine. Enhanced solutions using latest technol-
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Manufacturer: Mydata

CELLS Product & Job Tracking MES

Manufacturing Execution System

Provides lean manu-
facturing. Integrates shop floor processes. Products, inventory, defects tracking. »»

Manufacturer: Unisoft

Featured Auction

Kimball Electronics - Surplus Assets from a World Class PCB Manufacturer


Sale Type: Online Auction

Sale Open: Tue, Jan. 15, 1:00 AM PST

Sale Ends: Wed, Jan. 16, 5:00 PM PST

Location of Assets: Gaylord, MI, USA

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Featured Video Best Inc

SMT Chip Component Prep--Dry Tack Method
(1 min. 44 sec.)


BEST Instructors have put to video demonstrations of common hand soldering skills. These are not designed to be in place of live one on one training where repetitive skills and subsequent one on one feedback is given. Rather they are quick refreshers designed to be viewed if a specific skill has not been practiced in a while.

Watch Video...


Solder Paste Inspection Systems

Posted by CL

I am looking into solder paste inspection systems. I have used a solder paste height inspection system in the past. We have derived less than usefull information...»»

Profiling Board life cycle

Posted by Adam

Does anybody have done the profiling board life time experiment? The profiling board seem to deteriorate very fast. It hard to verify that the deviation of temperature profile... »»

Silkscreen/Legend on Pad

Posted by CSullivan

I was just wondering what the most common process is for silkscreen/legend removal and/or rework? Scenario: Fab house had a registration issue... »»

Visit the Forum...


SMTA Anaheim Academy: Practical Innovations for 3D Packaging of ICs

Seminar/Course | SMTA

Tue, January 29, 2008 | Anaheim Convention Center, Anaheim, CA, USA

Addressing System Level Integration and Miniaturization for Electronics. The participants will be able to explore a number of alternative package methodologies... »»

Free Reflow Profiling Webinar

Conference | Heller Industries Inc.

Thu, January 17, 2008 | Online

Success Starts with the Right Profile. Join the leader in oven technology for the latest in thermal profiling information... »»


Trade Show/Exhibition | Reed Exhibitions Japan Ltd.

Wed, January 16, 2008 | Tokyo Big Sight, Tokyo, Japan

Exhibition Featuring all Lines of Test, Inspection and Measurement Systems for SMT, IC Packaging and Board Manufacturing... »»

Visit the Event Calendar...

Career Center

Lead Supplier Quality Engineer- Fluid Systems

General Electric

Schenectady, NY, USA

Responsible for supplier quality for assigned Fluid Systems. Complete Supplier qualifications as required assuring that assigned suppliers have capability... »»

Engineering Technician


Sugarland, TX, USA

Creates programs using CircuitCAM, or manually, for Automated Placement, Inspection, and Test machines used in the manufacturing of printed circuit boards... »»

Process Engineer

Schweitzer Engineering Laboratories

Pullman, WA, USA

The ideal candidate will be able to assist management to specify, evaluate, recommend and conduct acceptance tests on electronic assembly process equipment...»»

Visit Career Center...

Industry Associations


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 for SMT Processes and Six Sigma Green Belt


Next Event: Medical Electronics Symposium


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

Standards & Publications

Online Store

Next Event: IPC/JEDEC Seminar: The Challenges of Going Green held in conjunction with the Consumer Electronics Show

SMTnet Express
January 3, 2008

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