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FEATURES

Materials
Fabrication Influences on High-Frequency PCB Electrical Performance
The electrical performance of a board can be greatly impacted by how it is fabricated, especially at higher frequencies. High-frequency PCBs incorporate controlled-impedance circuit traces that require tight conductor etching tolerances and tight control of thickness. Electrical losses must often be controlled at higher frequencies, and such losses can be influenced by solder mask and ENIG.
by John Coonrod

Data Transfer
Gerber Grows Attributes
Output and read by every PCB design and engineering system in the world, the Gerber format is the de facto standard for CAD-to-CAM data transfer. A new extension to the age-old format now permits layer structures, features and functions to be described.
by Karel Tavernier

NTI-100
The Changing Fab Landscape
The annual list of the largest PCB fabricators reveals big changes coming to Japan and Thailand. But for Brazil, India and the West, it’s more of the same.
by Dr. Hayao Nakahara

FIRST PERSON

• Caveat Lector
  Killer apps.
  Mike Buetow

MONEY MATTERS

• ROI
  Tight squeeze.
  Peter Bigelow

TECH TALK

• On the Forefront
  Joint developments.
  E. Jan Vardaman
  
  

• Designer’s Notebook
  The value of replicating.
  Yan Killy
  
  

• Final Finishes
  End times for HASL?
  Lenora Toscano
  
  

• Flexperts
  Electrical test on flex.
  Mark Verbrugge
  
  

• Tech Tips
  Yield cause-and-effect.
  Robert Dervaes
  

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