OPTICAL AND ELECTRICAL COMPOSITE WIRING BOARD AND METHOD FOR FABRICATING SAME

摘要

A composite optical and electrical wiring board (10) comprises a lower insulating layer (32) also serving as a lower cladding (22), an upper insulating layer (34) also serving as an upper cladding (24), a core (26) provided between the lower insulating layer (32) and the upper insulating layer (34) and having a predetermined optical interconnection pattern, and a conductive layer (40) provided between the lower insulating layer (32) and the upper insulating layer (34) in parallel with the core (26) and having a predetermined electrical interconnection pattern. The core (26) and the conductive layer (40) are formed in such short fabrication steps that an optical interconnection recessed area (32a) and an electrical interconnection recessed area (32b) are formed on the lower insulating layer (32) by a press working, the recessed areas (32a, 32b) are filled with a core material and a conductive material, respectively, and then the core and conductive materials are so ground that their surfaces are leveled to the top surface of the lower insulating layer (32).