Patent ID: 6257771
Filing Date: 2001-07-10
Classification: G02B,H05K

Abstract:
An electro-optical hybrid wiring board comprising:an insulating substrate having an adhesive layer formed on one surface thereof;a plurality of outer connecting discrete optical fibers attached to said adhesive layer in a predetermined pattern, each of said optical fibers having a first end portion and a second end portion opposite to the first end portion, said first end portions of which are arrayed on said adhesive layer at a middle portion thereof and said second end portions of which are arrayed on said adhesive layer at a lateral end portion thereof;a filler layer applied with a filler material in a thickness sufficient to fill up undulations of surfaces of said optical fibers;a covering sheet formed on said filler layer;window means formed at the middle surface portion of the adhesive layer in the filler layer and the covering sheet to expose the first end portions of said optical fibers; andreflecting means for reflecting incident light entering thereto from the first end portions of said optical fibers at a right angle so as to direct reflected, light into a direction perpendicular to the one surface of the insulating substrate out of said covering sheet through the window means, and reflecting light entering thereto through the window means from outside of said covering sheet in the direction perpendicular to the one surface of said substrate at a right angle so as to direct reflected light through the first end portions into said optical fibers; andan electrical wiring sheet laminated to the other surface of said insulating substrate and having an electric wiring pattern;whereby optical elements can be mounted on said covering sheet above the window openings so as to be connected to the optical fibers while electronic elements can he mounted on said electrical wiring sheet so as to be connected to the electric wiring pattern in hybrid manner.