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
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
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 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
China: Opportunity and yet opaque.
Lead-free: Is this the end for PCB fabricators?
No Myths Allowed
Capacitance between signal and return conductors.
Dr. Eric Bogatin
Many variables affect resistor heating, and most relate to PCB design and construction.
The Plating Rack
Spotting Type 1 ICDs.
Preparing for the job jump.
The Flex Market
Design concepts for flex boards.
Out with the old: me.