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. 07, 2002
Filed:
Feb. 07, 2000
Mitsuru Kurihara, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A method for connecting an optical waveguide and an optical semiconductor device and an apparatus for connecting the same, capable of removing a working error and getting a high optical coupling coefficiency. The method consisting of the steps of: moving the optical semiconductor device to the substrate so as to overlap the pair of the first positioning marks and the pair of the second positioning marks; obtaining an actual distance from the outgoing surface to the pair of the second positioning marks, based on an image photographed by allowing the infrared ray to transmit through the substrate and the optical semiconductor device; obtaining an error between the actual distance and a designed distance previously set, by subtracting the designed distance between the outgoing surface of the optical semiconductor device and the pair of the second positioning marks from the actual distance; moving the pair of the second positioning marks relative to the pair of the first positioning marks by a quantity equal to the error so as to cancel the error; and jointing the optical semiconductor device to the substrate.