PHOTOCOUPLING CIRCUIT ELEMENT

摘要

PURPOSE:To provide a photocoupling circuit element of low cost and high reliability which can meet the requirements of multiprocessor architecture. CONSTITUTION:A photocoupling circuit element 1 comprises an optical transmission element 2 transmitting optical signals by a pn junction structure using a multipore silicon 3 built in a monocrystal silicon substrate 4 and a light- receiving element 6 receiving optical signals built in another substrate 5 in such a manner that the optical transmission element 2 and the light receiving element 6 are arranged to face each other and junctioned. This photocoupling circuit element 1 uses a monocrystal silicon substrate 4 of lower cost than that of a substrate using a compound semiconductor and of high physical reliability and also contains the optical transmission element 2 using the multipore silicon 3 which has an excellent function of transmitting optical signals. As a result, it is low cost with high reliability and can also meet the requirement of multiprocessor architecture.