Making connections in the printed circuit board industry with tips, commentary and news written just for you.

The Superconductive Circuit Board

4 Tips for Saving on Circuit Board Prototyping Costs

Posted by Paul Jackson on Thu, Jul 19, 2012 @ 01:04 PM

circuit baord small

1) Thermal and antipad clearances

Considering thermals and antipad clearances on the power &/or ground plane layers of multilayer boards - if layer to layer registration, tolerances for hole size, location, film expansion and registration have not been taken into account then manufacturing will experience high reject rates and increased costs.

Antipads should be 0.010 to 0.020" larger than outer layer pads. For thermal pads the moat should be a minimum of 0.012 ( preferable 0.015) and pads should be equal to or larger than outer layer pads.

Clearances for solder masks around non plated holes should be at least .005"

2)Restrictive tolerances for multilayer board thicknesses

Specifying tolerances that are very tight can result in higher costs, increased time and lower yields. It is suggested to call for restrictive tolerances only when they are critical to your design.

3)Minimum Text Widths Less than 0.0080” on Silkscreen Layers

Providing artwork which requires Text Widths less than 0.0080” requires extra imaging and processor steps which will increase the cost of your project.

4)Specifying hole sizes less than 0.016” if not required

Requires boards to be subjected to additional chemical processing to ensure sizing and clean-outs are complete.  These additional steps could add one full day to your processing time along with the associated costs.

Photo by SD Jackson Photography. All rights reserved.

Tags: electrical engineering, printed circuit board design

Subscribe Now!

Submit File for Quote

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.

aluminum trace design kit