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August 2021

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TechNet <[log in to unmask]>
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Date:
Tue, 10 Aug 2021 14:23:47 +0000
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TechNet E-Mail Forum <[log in to unmask]>, "Nutting, Phil" <[log in to unmask]>
Subject:
square spiral etch pattern found on boards
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"Nutting, Phil" <[log in to unmask]>
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Esteemed colleagues,

I have been asked about a square spiral pattern of etch on several of our circuit boards.  The ends are not connected to anything.  I assume it is for verifying copper etch width or etched space width.

Can someone shed some light on these patterns?


Phil Nutting | Senior Development Engineer | Lab: +1-978-224-4334 | Mobile: +1-978-828-. 8664
35 Congress Street | Salem, MA 01970 | U.S.A. | www.excelitas.com<http://www.excelitas.com/>

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