2011 Issues

June 2011 cover

 

FEATURES

Cover Story
Benefits and Challenges of 3D Semiconductor Packaging
By integrating multiple die elements within a single package outline, overall product functionality has increased and been made smaller than their predecessors, improving both performance and capability. Assembly of semiconductor die onto a substrate is essentially the same as those used for standard IC packaging in lead frames; however, substrate-based IC packaging for 3D applications can adopt a wider range of materials, and several alternative processes may be used in their assembly.
by Vern Solberg

Component Placement
The Effect of Placement Yield on Rework Costs
Calculating rework and scrap cost is relatively straightforward, provided the production line’s first-pass yield is known. Knowing how pick-and-place accuracy can impact post-assembly costs, however, can be an invaluable benchmark, as this study of cost as a function of various yield rates and line capacity shows.
by Sjef van Gastel

Inspection
Using Automated SPI to Qualify SMT Stencil Suppliers
The goal of stencil printing can be summed in one simple phrase: Get the right amount of solder paste in the right spot – every time. And the right stencil starts with the right supplier, but with all the options in metals, manufacturing processes, frame styles and price, selecting a stencil vendor can be a considerable task.
by Chrys Shea

 

FIRST PERSON

  • Caveat Lector
    Standard problems.
    Mike Buetow

 

MONEY MATTERS

    • ROI
      Ensuring onshoring.
      Peter Bigelow

    • Focus on Business
      Talk, talk, talk.
      Susan Mucha

 

TECH TALK

  • Screen Printing
    A new summer coat.
    Clive Ashmore

  • Test and Inspection
    A choice of options?
    Jun Balangue

  • Process Doctor
    Equipped for success.
    Dr. Harald Wack

  • Getting Lean
    JIT vs. inventory, revisited.
    Todd Baggett

  • Technical Abstracts
    In Case You Missed It.

May 2011 cover

FEATURES

PCB PROCUREMENT
10 Tips for Purchasing PCBs
Four industry veterans with backgrounds in PCB materials, chemistry, fabrication and assembly provided their expert advice, often echoing each other’s recommendations. If you want to maximize PCB quality, price, performance, delivery or overall value, try following some of these insiders’ tips.
by Marissa Oskarsen

CATCHING COUNTERFEITS
Verifying Component Authenticity Using Decapsulation
Decapsulation is a process that has been around for some time and has many different applications. Whether for analysis or verification purposes, the goal is the same: expose the die to perform the task at hand. While different methods are available to achieve this, manual etching has become a primary choice for exposing the die, as it leaves the device in question functional.
by Don Davis

FIXING THE FENCE
RF Shield Rework
RF shield rework is difficult due to continually shrinking package sizes, reduction of pitch and reduced clear space available around components. This increased density and complexity drives new techniques for removing and replacing RF shields. A new solution involves high-energy conduction heating and custom tips.
by Paul Wood

 

FIRST PERSON

  • Caveat Lector
    Martin’s law.
    Mike Buetow

 

MONEY MATTERS

    • Global Sourcing
      Making sense of the macros.
      Jennifer Read
    • ROI
      Taken for granted.
      Peter Bigelow

 

TECH TALK

  • On the Forefront
    Supply chain unlinked.
    E. Jan Vardaman

  • Process Doctor
    Smaller and tighter heightens residues’ effects.
    Dr. Mike Bixenman

  • Materials World
    Printed electronics applications.
    Jie Bai

  • Solar Technologies
    Solar conversion efficiency.
    Tom Falcon

  • Technical Abstracts
    In Case You Missed It.

April 2011 cover

FEATURES

QA MODELING
Are Current Qualification Practices Adequate?
It is well known that devices and systems pass existing QT only to fail in the field. Other devices undergo extensive – and expensive – testing. Is this a problem? And do we truly understand the cost not just of failure, but of excessive test? A new approach to qualifying electronics devices could ensure a predictable, and low, probability of failure.
by Ephraim Suhir, Ph.D. and Ravi Mahajan, Ph.D.

SOLDER PROFILE
AIM Sets Its Targets
A family run business since 1936, AIM has become one of the world’s five largest electronics solder manufacturers. If only the world electronics industry knew. In an exclusive, Circuits Assembly goes inside the company's vast Montreal manufacturing facilities to find out what makes AIM at once so successful yet so unsung.
by Mike Buetow

SCREEN PRINTING
Testing the Mettle of Stencil Foils
According to our latest design of experiments, foil alloy does influence paste release: Over an area ratio range of approximately 0.5 to 0.75, the best performers were fine grain stainless steel and electropolished stainless steel.
by Chrys Shea

 

FIRST PERSON

  • Caveat Lector
    Hedging turmoil.
    Mike Buetow

 

MONEY MATTERS

    • Global Sourcing
      No stopping Thailand or Tunisia.
      Jennifer Read
    • ROI
      Productivity lost.
      Peter Bigelow

    • Focus on Business
      Building the EMS brand.
      Susan Mucha

 

TECH TALK

  • Screen Printing
    Understencil cleaning.
    Clive Ashmore

  • Tech Tips
    The best tip(s).
    ACI Technologies Inc.

  • Test and Inspection
    In-circuit’s direct savings.
    Wee-Sheng Yong

  • Process Doctor
    Capacitive surface effects.
    Dr. Harald Wack

  • Defects Database
    Cracked up.
    Dr. Davide Di Maio

  • SMT Troubleshooting
    Solder balls.
    Paul Lotosky

  • Getting Lean
    Customer involvement.
    Steve Fraser
  • Technical Abstracts
    In Case You Missed It.

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