The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2007
Filed:
Feb. 10, 2004
Urs Bapst, Ncuhaus, CH;
Christoph Berger, Horgen, CH;
Russell Alan Budd, North Salem, NY (US);
Folkert Horst, Zurich, CH;
Bert Jan Offrein, Langnau am Albis, CH;
Urs Bapst, Ncuhaus, CH;
Christoph Berger, Horgen, CH;
Russell Alan Budd, North Salem, NY (US);
Folkert Horst, Zurich, CH;
Bert Jan Offrein, Langnau am Albis, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
Techniques for circuit board processing are provided. In one aspect, a method of processing a circuit board having one or more optical waveguides associated therewith is provided. The method comprises the following steps. One or more etch stop layers in proximity to the one or more waveguides are provided, at least one of the etch stop layers comprising one or more fiducials therein. From a surface of the circuit board, the one or more etch stop layers are used to selectively remove material to provide openings having a defined positioning and depth in the circuit board. A circuit board having one or more optical waveguides associated therewith is also provided.