X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com X-Injected-Via-Gmane: http://gmane.org/ To: geda-user AT delorie DOT com From: Kai-Martin Knaak Subject: Re: [geda-user] Commonness of internal layer cutouts/cavities? Date: Mon, 16 Feb 2015 22:05:50 +0100 Organization: Institut =?UTF-8?B?ZsO8cg==?= Quantenoptik Lines: 26 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Complaints-To: usenet AT ger DOT gmane DOT org X-Gmane-NNTP-Posting-Host: 130.75.103.107 User-Agent: KNode/4.14.1 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id t1GKwNu3031479 Reply-To: geda-user AT delorie DOT com 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 GPG key: http://pgp.mit.edu:11371/pks/lookup?search=Knaak+kmk&op=get