Patent ID: 6799713
Filing Date: 2004-10-05
Classification: G02B,H01S

Abstract:
A flip-chip bonding method comprising the steps of:successively forming a lower-clad layer and a core on a semiconductor substrate; etching the lower-clad layer and the core on a designated area for mounting an optical device so that the lower-clad layer is etched partially to leave the lower-clad layer in a thickness necessary to align the optical device vertically on the semiconductor substrate; forming an upper-clad layer on the whole upper surface of the semiconductor substrate including the upper surface of the core and the etched surface of the lower-clad layer; forming steps on a part of the designated area for mounting the optical device by etching the upper-clad layer and the lower-clad layer on the designated area for mounting the optical device; forming electrodes on the upper surface of the etched lower-clad layer of other parts of the designated area for mounting the optical device; depositing a solder bump on the upper surfaces of the electrodes; and, flip-chip bonding an optical device with bonding pads corresponding to the solder bump to the semiconductor substrate.