Burn-in & Test Socket WorkshopTM


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BiTS is the world's premier workshop dedicated to providing a forum for the latest information about burn-in and test socketing, and related fields.
At BiTS you'll find a comprehensive technical program, exhibits of the latest products and services, and many opportunities to meet, network and explore ideas with other test and burn-in socketing professionals.

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The papers in this publication comprise the proceedings of the 2008 BiTS Workshop. They reflect the authors’ opinions and are reproduced as presented , without change. Their inclusion in this publication does not constitute an endorsement by the BiTS Workshop, the sponsors, BiTS Workshop LLC, or the authors.

There is NO copyright protection claimed by this publication or the authors. However, each presentation is the work of the authors and their respective companies: as such, it is strongly suggested that any use reflect proper acknowledgement to the appropriate source. Any questions regarding the use of any materials presented should be directed to the author/s or their companies.

All photographs on this page are copyrighted by BiTS Workshop LLC. The BiTS logo and ‘Burn-in & Test Socket Workshop’ are trademarks of BiTS Workshop LLC.

Technical Program

More than 25 presentations addressing important topics in socketing and related areas were delivered by authors from the user and supplier communities.

INTRODUCING - Two Poster Sessions, where attendees and authors communicated directly and interactively to share and explore ideas.

Two Tutorials were offered where participants learned from experts to build your leading edge skills.

A respected Invited Speaker shared his views on advanced packaging trends and challenges.

In the Keynote Address, a renowned industry leader spoke on a key topic sure to stimulate thoughts and ideas.

BiTS EXPO 2008
60 exhibitors, from socketing and related industries, exhibited their products and services during breaks in the technical program.  Click HERE for more info on BiTS EXPO 2008.

BiTS 2008 brought together 350 full-conference attendees and 60 exhibitors from around the world, representing end users and suppliers of sockets, boards, burn-in systems, handlers, packages and other related equipment, materials and services.

BiTS 2008 in the Press
BiTS 2008 Organizing Committee
Fred Taber (BiTS Workshop), Morten Jensen (Intel), Rafiq Hussain (AMD),  Mike Noel (Freescale), Joachim Moerbt (Advantest Europe), John Moore (Texas Instruments), Steve Hamren (Micron Technology), Kena Pegram (Anestel), Owen Prillaman (Yamaichi Electronics)

Marc Knox (IBM), Mark Murdza (Cascade Microtech), Paul Boyce (Advantage Specialist), Valts Treibergs (Everett Charles Technologies)

Sunday, March 9,  2008


Tutorial 1

Basic Chip Reliability Concepts
(Product RE "101")

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Ann Swift
Senior Engineer
IBM Microelectronics

This talk focuses on the basic concepts of CMOS semiconductor screening and failure rate projections. Basic reliability engineering concepts are discussed (the "bathtub" curve, the difference between wearout and defect mechanisms, acceleration factors, etc.). Failure rate models to relate accelerated testing/stressing to product lifetimes are illustrated. Various manufacturing screens (such as Burn-in and Voltage Screen) are shown along with their impact on product failure rates. What the future might hold for reliability screening is also discussed.
Who should have attended this tutorial?
What is that accelerated testing/stressing that companies do using the sockets developed by BiTS member companies? Have you ever wondered what these product reliability engineers you talk to do? If so, this tutorial will help you understand the world of reliability engineering and accelerated testing/stressing. This talk will focus on basic concepts of CMOS semiconductor screening and failure rate projections. Various manufacturing screens (such as Burn-in and Voltage Screen) will be discussed along with their impact on product failure rates. The talk will begin with the basic concepts of reliability engineering. The differences between wearout and defect mechanisms in semiconductor devices will be discussed. Reliability testing methods including stress acceleration and screening will be illustrated and examples of how to relate accelerated data to "real life" will be discussed. This tutorial is a must for anyone interested in starting to understand the field of chip reliability.

Tutorial 2

Intellectual Property: What Is It and What Do I Do With It?

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Ira Blecker, Esq.
Patent Attorney
Law Offices of Ira D. Blecker, P.C.

Intellectual Property is important, and will become increasingly important, to the electronics industry. Intellectual Property includes (but is not limited to) patents, copyrights, trademarks and trade secrets. After a brief review of the types of Intellectual Property, this tutorial primarily focus on a deep dive into the patent aspect of Intellectual Property. Topics included are pre-patent protection of your Intellectual Property, what is a patent, how to read a patent, how to interpret the claims of a patent, the patenting process from invention disclosure to patent, types of patent applications, worldwide patenting mechanisms including the Paris Convention, the European Patent Convention and the Patent Cooperation Treaty and some recent important court decisions. Patent enforcement, highlighting some troublesome countries, are also be touched upon.
Who should have attended this tutorial?
Have you ever had questions on Intellectual Property but you didn't know who to ask for answers? Have you ever wanted to learn more about Intellectual Property? This tutorial is meant to be a primer on Intellectual Property for inventors, engineers and business persons (i.e., specifically non-lawyers) who deal with Intellectual Property in some way, shape or form. The tutorial will cover a broad range of topics beginning with a definition of what is Intellectual Property and then move into the arena of patents as Intellectual Property. The tutorial will finish with some discussion of international aspects of protecting and enforcing Intellectual Property. There will be something in the tutorial for all those interested in the subject of Intellectual Property, whether you know a little or a lot about Intellectual Property.


Invited Speaker

Catching the Mobile Wave: Packaging is Going 3D

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Dr. Belgacem Haba
Fellow and CTO of Advanced Packaging and Interconnect
Tessera Inc.

Hand-held communication and entertainment products will continue to dominate the consumer markets worldwide, and with each generation offering more and more features and/or capability, system level integration and miniaturization becomes more of a priority. And even though the actual applications and functionality of the new product offering expands, the customer is expecting each generation to be smaller and lighter that its predecessor.

The cell phone is a great example of how new technologies and techniques can be applied to maintain performance improvements over time. The explosion of the cell phone market over the last few years is a testament to the increase of functionality and complexity of miniaturization. However, this has led to some serious issues, especially mechanical, thermal and shielding problems. Less than one part in 1,000 of the volume of an electronic product is occupied by transistors. The remaining volume consists of mechanical structure, air, passive elements, cables and connectors. 3D stacking is a natural way to reduce the system volume. Die fabricated at different process geometries can be brought together in a 3D stack, thus avoiding some of the cost issues associated with system-on-chip (SoC) designs.

This presentation focuses on the different alternatives available for 3D packaging as well as new ideas that people are planning for the mobile phone revolution to continue.

Dr Haba is responsible for overseeing next-generation research and development activities for Tessera, Inc. Dr. Haba was a founder of SiliconPipe Inc. His previous positions include managing the packaging research and development division at Rambus, managing advanced research and development projects at the NEC Central Research Laboratories in Japan and, before that, he worked for IBM at its T.J. Watson Research Center in New York. He holds 93 U.S. patents, and over 150 worldwide patents and patent applications. Dr. Haba was awarded the Most Inspirational Paper award at the 2006 BiTS Workshop.




Opening Remarks

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Welcoming remarks from the General Chair

BiTS 2008 Keynote Address Packaging & Assembly in Pursuit of Moore’s Law and Beyond

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Karl Johnson Ph.D.
Vice President and Senior Fellow
Advanced Packaging Systems Integration Laboratory
Freescale Semiconductor
As the semiconductor industry continues in its pursuit along the curve of Moore’s Law from 65 nm to 45 nm, 32 nm and beyond, the challenges for packaging and assembly technologies are becoming significant. Packaging can no longer be thought of as a back end process largely independent of the silicon and product definition. The assembly and packaging technologies have become an integral component in the overall performance, figures of merit and cost competitiveness of these new generations of products. Further, market trends and customer expectations are moving rapidly into higher levels of system integration and system solutions. This trend is moving products toward greater levels of integration and diversification beyond the scaling of Moore’s Law.

Rapid market growth in areas beyond the traditional drivers for the semiconductor industry, such as computer and industrial applications, into consumer applications with semiconductor based systems becoming pervasive in all aspects of our lives is placing additional demands on packaging. These demands include but are not limited to lower cost, shorter time to market and greater flexibility and reuse.

This presentation addresses these new challenges, the trends in packaging and assembly and some unique solutions that are being developed and implemented. A broad spectrum of products solutions from system-on-chip, 3D, system-in-package as well as “wafer level” assembly are discussed.

Dr. Johnson leads the Advanced Packaging Systems Integration Laboratory (APSL) within the Freescale Technology Solutions Organization. This laboratory is responsible for the development and implementation of a broad spectrum of packaging advances in support of Freescale Semiconductor’s business and strategy. These innovations are in areas which include analog power, RF and sensor modules, automotive applications and advanced wirebond and flip chip packages.


Session 1

Fine Pitch PCB Challenges

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This opening session explores the challenges faced when dealing with how high pin count and fine pitch applications impact PCB design and the assembly and test process. You'll hear about incorporating new technologies into the socket design to help with PCB assembly issues, a new interposer option to reduce costs and address typical issues with PCB assembly and to round out this session, a discussion on diagnosing issues with high density fine pitch boards.
"Super-Sockets: Integration of Technology From Test Board Into Socket Assembly"
Darren Young
Anestal Corporation
Tom Bresnan
R&D Circuits, Inc.
"Column Failure on Memory Burn-In Boards"
Yogesh Ahuja
Pycon Inc.

Session 2

  Clean Up Your (Socket) Act

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The papers in this session focuses on cleaning up the down and dirty side of BiTS applications. The common contamination enemies of production electrical contacts is examined from a number of different angles. We start with the methods and techniques used in the initial identification of failed and failing contacts, followed by a post mortem examination of failed contacts. Finally, various cleaning techniques and methods used to refurbish / restore contacts are presented. This session promises to raise your awareness of socket cleaning challenges and solutions.
"An Examination of the Causes of Cres Degradation Which Affect the Life of a Test Socket"
Nick Langston Jr.
Antares Advanced Test Technologies
"Improved Method for Socket Evaluation, Development and Cleaning"
Terence Q. Collier
"CO2 Composite Spray Technology For Test Socket Cleaning"
David Jackson
Cool Clean Technologies
"Batting Cleanup: Approaches to Maintenance of WLCSP Probe Card Interposers"
Jon Diller
Interconnect Devices, Inc.
Jamie Andes
Interconnect Devices, Inc.

Session 3

  Sockets: On the Floor, In the Lab

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The application to test devices either in the field or in the lab should determine the socket or contactor. Once selected, the appropriate usage envelope, especially under extreme thermal and power conditions, must be designed and established. And during production testing the necessary tools must be available to analyze the usage of the sockets to control performance and cost. All three aspects, selection, usage and field analysis are addressed during this session.
"Contactor Selection Criteria Overview for RF Component Testing"
James Migliaccio, Ph. D.
RF Microdevices
"Design Optimized, Manufacturing Limited - A 250W Thermal Solution"
Trevor Moody
Antares Advanced Test Tech.
Kevin Hanson
Antares Advanced Test Tech.
Rick Davis
Antares Advanced Test Tech.
"Test Socket Tracking: From Cradle to Grave"
Angelo M. Giaimo
IBM Corporation

Poster Session 1


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This is the first of two poster sessions.


"Complete Z0 = 50 Ohm Coaxial Spring Probe IC Socket"
Tatsumi Watabe
S.E.R. Corporation
"High Frequency Wafer Level Test Approach with Coaxial Socket"
Craig Hudson
Yokowo Co., Ltd.
Takuto Yoshida
Yokowo Co., Ltd.
Takahiro Nagata
Yokowo Co., Ltd. 
Atushi Sato
Yokowo Co., Ltd.
Satoshi Kakegawa
Yokowo Co., Ltd.
"Signal and Power Integrity Analysis of ATE Loadboard Socket and Package"
James Zhou
Antares Advanced Test Tech.
Hongjun Yao
Antares Advanced Test Tech.
Wei Wang
Sigrity, Inc.
"Fine Pitch Socket Solution"
Shunji Abe
Yamaichi Electronics Co., Ltd.



Session 4

  Thermal Issues - A Better Understanding

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The Power/Thermal envelope continues to be pushed unremittingly as device power increases - driving constant investigation into methods and techniques to come up with the best solution for BiTS applications. To foster a basic understanding, we kick things off and with a brief synopsis of thermodynamics principles, thermal modeling and a look at the entire stack-up of materials and interfaces in the industry today. Following that, we dig into the critical factors of thermal paths, interface materials, and heat transfer across different materials.
"Thermal Design and Analysis"
Harlan Faller
Johnstech International
"Chasing Die Temp - What Impacts the Actual Die Temp in Burn-in? How About the Socket?"
Mike Noel
Doug Grover
Doug Laing
Dan Wilcox
"Metal Interface Materials for Burn-in Applications"
Jordan Ross
Indium Corporation
"Optimized Air Cooled Test Socket"
Grant Wagner
IBM Microelectronics
David Gardell
IBM Microelectronics

Session 5

  Innovative Contact Techniques

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It is a platitude that new package shrinks, and higher frequencies require new contact technologies. Simply improving certain parameters of a contactor are not sufficient enough in the long term. Therefore advanced technologies are required to contact the device or even test without contacting the device. But the market demands that lower price must go hand-in-hand with better functionality. In this session, learn about new contacting concepts and their cost aspects.
“Contact Pin Complexities: Valuing Performance and Cost”
Paul Schubring
“New Concept in Spring Probe Design”
John Winter
Rika Denshi America, Inc.
Larre Nelson
Rika Denshi America, Inc.
Amos Friedner
Rika Denshi America, Inc.
“Non-Contact System-in-Package Testing”
Jeff Hintzke
Scanimetrics, Inc.
Chris Sellathamby
Scanimetrics, Inc.
Brian Moore
Scanimetrics, Inc.

Hot Topics Session

  From Evaluation to Practice

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Each year the Hot Topics Session highlights work that covers one or more current or emerging high focus themes. Currently among them are three subjects that are receiving a great deal of attention: contamination, wafer scale test and advanced modeling and simulation techniques/methods. In this 4-paper session, each author explores and shares their novel approach to one of these topics.
"Keeping It Real: Simulating QFN and BGA Probe Performance in the Test Lab"
Kevin Deford
Nick Argyros
Jon Diller
"Finite Element Analysis Using Elastic Membrane Technique for Test Socket Design Optimization"
K. Prabakaran
Antares Advanced Test Tech.
Ila Pal
Antares Advanced Test Tech.
"High-Performance Contactors for Wafer-Level Test (WLT)"
Jim Brandes
Everett Charles Technologies
"A Latch System for the Delicate IC Package"
Hideyuki Takahashi
Sensata Technologies Inc.
Hide Furukawa
Sensata Technologies Inc.

Poster Session 2

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This is the second of two poster sessions.
"Kelvin Contacting"
Jim Brandes
Everett Charles Technologies
"Use Simulation to Obtain S Parameters and Network Parameters for Sockets and PCB/Connectors"
Sultan Faiz
Ironwood Electronics
Mike Fedde
Ironwood Electronics
"New Solution for Chipscale RF Lead Free ATE Test"
Sergio Diaz
Ardent Concepts, Inc.
"1mm Length Spring Probe Practical? - A Study of Spring Pin Dimension Limit"
Jiachun (Frank) Zhou
Antares Advanced Test Tech.
Praveen Matlapudi
Antares Advanced Test Tech.
Mark Murdza
Antares Advanced Test Tech.
"Challenges of Surface Mounted Test Sockets"
Dr. Shih-Wei Hsiao
Andrew Gattuso



Session 6

 Key Challenges and Technology Trends in Socket Design

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Keeping pace with the Packaging Industry's increasingly complex & ever demanding requirements for unique applications, higher speeds, and higher pin counts presents a significant challenge to Test & Burn-in tooling. With this, the design of effective & reliable socketing solutions often requires an understanding of the critical design elements surrounding the interface between the socket and the DUT package, as well as with the test board. In this session the authors share assessments, concerns, and various solutions that help improve overall socket design and performance.
"Automated Topside and Bottomside Testing of POP Packages on a Robotic Handler"
Eric Pensa
Texas Instruments
Willie Jerrels
Texas Instruments
"High Speed Contactor Interconnect"
David Mahoney
Xilinx, Inc.
Hongjun Yao
Antares Advanced Test Tech.
"Particle Interconnect: Simple and Effective Socket Solution"
Robert Howell

Session 7

  High Frequency Developments

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High frequency requirements generate special challenges. In this session several of these challenges are examined including the impact on the test environment posed by differential signal technology, and the effect device placement and alignment accuracy has on RF performance. Rounding out this session is a discussion of a high speed test interface that enables up to 400Mhz testing in a highly parallel test system.
"Challenging Device Interface for High Speed DIMM Module Testing"
Joachim Moerbt Advantest (Europe) GmbH Rose Hu
Advantest (Europe) GmbH
"Tolerance Induced Test Socket RF Performance Variation"
Gert Hohenwarter
GateWave Northern, Inc.
"From Single-Ended to Differential"
Ryan Satrom
Everett Charles Technologies

Awards / Closing Remarks

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Page last modified 03/28/11

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