Patent ID: 6586269
Filing Date: 2003-07-01
Classification: H01L

Abstract:
A method of making a photoconductive relay, the method comprising:providing a light-emitting device having a major surface including a light-emitting region and a photoconductive switching element having a major surface including light-receiving region; forming conductive pads on the major surface of the light-emitting device and connecting pads on the major surface of the photoconductive switching element; forming bumps of a conductive, fusible material on one of the conductive pads and the connecting pads; positioning the light-emitting device and the photoconductive switching element with the major surfaces opposite one another and the bumps contacting the other of the conductive pads and the connecting pads; melting the bumps, the molten bumps moving one of the light-emitting device and the photoconductive switching element relative to the other to align the light-emitting region and the light-receiving region, and defining a separation between the major surfaces; and solidifying the molten bumps to form columns interconnecting the light-emitting device and the photoconductive switching element with the separation no more than 100 &mgr;m.