Patent ID: 6385223
Filing Date: 2002-05-07
Classification: G02B

Abstract:
A method for connecting an optical waveguide for guiding light and an optical semiconductor device having an outgoing surface for emitting said light, said optical waveguide being formed in a first region on a top surface of a substrate, on which a pair of first positioning marks are formed for transmitting or shielding an infrared ray only at specified spots in a second region adjacent to said first region, and said optical semiconductor device having a bottom surface on which a pair of second positioning marks for transmitting or shielding said infrared ray are formed thereof, said second positioning marks being concentric and having a different diameter from that of said first positioning marks and an inverted pattern shape to that of said first positioning marks,said method comprising the steps of: moving said optical semiconductor device to said substrate so as to overlap said pair of said first positioning marks and said pair of said second positioning marks; obtaining an actual distance from said outgoing surface to said pair of said second positioning marks, based on an image photographed by allowing said infrared ray to transmit through said substrate and said optical semiconductor device; obtaining an error between said actual distance and a designed distance previously set, by subtracting said designed distance between said outgoing surface of said optical semiconductor device and said pair of said second positioning marks from said actual distance; moving said pair of said second positioning marks relative to said pair of said first positioning marks by a quantity equal to said error so as to cancel said error; and jointing said optical semiconductor device to said substrate.