What is Controlled Impedance and How Is It Measured?

One of the most common examples of controlled impedance is the cable that connects the antenna to your television. That cable may be a coaxial cable consisting of a round, inner conductor, separated from the outer cylindrical conductor commonly called …
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Secrets of a Fabrication Drawing

Essential to the success of any printed circuit board (PCB) manufacturing project are the detailed notes included in the fabrication drawing. While the design files (typically Gerber or ODB++) contain the most basic structure and outline of the board design, it is the fabrication drawing that tells the manufacturer the specific details about a board that make it unique.
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V-Scoring for Printed Circuit Boards

Bay Area Circuits recently installed a new Accu-Score AS-100-MAX V-scoring machine in our Silicon Valley facility. This new scoring machine will not only improve the quality of the printed circuit boards scoring process, but also shortens manufacturing process time.  Both big wins for our customers.  …
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Introduction to IPC Inspection Guidelines

Acceptable Quality Level Before discussing IPC Inspection Guidelines, it’s important to understand the meaning of the term Acceptable Quality Level (AQL), also referred to as Acceptance Quality Limit. It is an inspection standard that prescribes the range of the number …
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