FEATURES

Testing Basics
What Designers Need to Know about Testing
High-speed layout, blind and buried vias and other restrictions render traditional testing methods less effective. With combo-test - vision and flying probe - taking off, what does this mean for layout?
by Robert Hanson

Better Routing
Avoiding Differential Pair Routing Violations
How do you recognize and avoid layout mistakes when routing high-speed differential pairs? Try this practical modeling and simulation for achieving optimum design.
by Dr. Abe Riazi

Embedded Capacitance Patents
The History of Embedded Distributed Capacitance
Think the concept of using closely spaced power and ground planes as a parallel plate capacitor for power supply decoupling was invented in the late 1980s? New research shows U.S. patents dating to the 1920s.
by Joel S. Peiffer

Cover Story
Designing Flexible Circuits
Flex circuits are like origami: folded, twisted and shoved into tiny packages. Combining elements mechanical and electrical, these unique boards require special design techniques.
by Mike Buetow

Microvia Technology
Microvia Market Dialing Up Big Gains
As chip density increases and substrates contain more I/Os, PCBs will require more microvias, for reasons of economics and efficient connections. Just how many more may surprise you.
by Dr. Hayao Nakahara

POINT OF VIEW

Power Selling
China: Opportunity and yet opaque.
Dan Beaulieu

ROI
Lead-free: Is this the end for PCB fabricators?
Peter Bigelow

No Myths Allowed
Capacitance between signal and return conductors.
Dr. Eric Bogatin

Getting Embedded
Many variables affect resistor heating, and most relate to PCB design and construction.
Mike Jouppi

The Plating Rack
Spotting Type 1 ICDs.
Michael Carano

Career Care
Preparing for the job jump.
Ted Daywalt

The Flex Market
Design concepts for flex boards.
Dominique Numakura

Our Line
Out with the old: me.
Mike Buetow

DEPARTMENTS

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