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From:	Kai-Martin Knaak <knaak AT iqo DOT uni-hannover DOT de>
Subject:	Re: [geda-user] Commonness of internal layer cutouts/cavities?
Date:	Mon, 16 Feb 2015 22:05:50 +0100
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Jason White wrote:

> How common are cavities (that is internal cutouts on a PCB specific to
> a single layer) in the electronics world?

IMHO, this depends on what kind of electronics you do. Keep-out 
requirements are quite common with components that deal with triple digit 
MHz to GHz bandwidth, or Johnson noise limited performance. Outside this 
regime, I would not worry about tracks running under components.

(But maybe I just don't have enough experience...)

---<)kaimartin(>---
-- 
Kai-Martin Knaak                                  tel: +49-511-762-2895
Universität Hannover, Inst. für Quantenoptik      fax: +49-511-762-2211	
Welfengarten 1, 30167 Hannover           http://www.iqo.uni-hannover.de
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