The Superconductive Circuit Board

Understanding PCB Manufacturing: Odd Layer PCB Boards

Posted by Michael Lesiak on Tue, Aug 05, 2014 @ 12:36 PM

Our cookbook of PCB recipes includes an assortment of odd layer PCBs.

About 8% of PCB boards we are asked to produce are comprised of an odd number of layers. But unless you have a specific requirement, it is usually best to design a multilayer board with an even number of layers. Reducing an even layered board by one layer may seem like a cost-saving move, but from a PCB perspective it is not. It may actually increase the cost as well as lead-time and leave you with a warped PCB board which may not meet your expectations. Let's look at the issues in detail.

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Tags: multi-layer, printed circuit board design, printed circuit board manufacturing, pcb board, pcb board design, PCB manufacturing

Understanding PCB Manufacturing: Impedance Control

Posted by Michael Lesiak on Wed, Mar 05, 2014 @ 11:59 AM

Printed circuit boards with impedance requirements demand a high level of precision.

Image courtesy of Zmetrix

For standard circuit boards, a PCB manufacturer is given a set of patterns - copper patterns, hole patterns, ink patterns, which are combined into a single circuit board with all the pattern sizes and positions within certain tolerances. Failure to meet a certain size or position with the specified tolerance can be cause for the circuit board to be rejected. If a trace has been defined as an impedance control trace, it is not the trace size which is strictly defined, but rather the impedance. While a nominal trace size will be provided in the Gerber layer, it is understood the circuit board manufacturer can vary trace width, height, and dielectric thickness as long as the final impedance is within tolerance.

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Tags: multi-layer, pcb quote, printed circuit board design, printed circuit boards, printed circuit board manufacturing

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Omni Circuit Boards is an e-sensitive manufacturer of Printed Circuit Boards.

Omni Circuit Boards has been in the printed circuit board fabrication business since 1985. It has been our goal to be as environmentally conscientious as possible.

We are committed to keeping our customers and the future of our children front of mind.

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