Patent ID: 6542525
Filing Date: 2003-04-01
Classification: H01S

Abstract:
A modulator, comprising:a) a semiconductor substrate; b) a ridge-like modulator structure formed on said semiconductor substrate for modulating a laser beam, said modulator structure including, a ridge-like beam waveguide, a current blocking layer disposed on opposite sides of the beam waveguide and said substrate, the current blocking layer having a first semi-insulating semiconductor layer and a first semiconductor layer successively formed on said substrate, and c) a pad structure formed on said semiconductor substrate and spaced away from said modulator structure via a channel portion having a bottom surface on the first semi-insulating semiconductor layer extending on said substrate from said modulator structure, for providing a wire-bonding pad base; d) an insulating layer extending on said modulator structure, said pad structure, and the channel portion, said insulating layer having an opening on said modulator structure; and e) a wire layer disposed on said insulating layer, said wire layer being in contact with said modulator structure through the opening.