Patent ID: 7242842

Claim:
A method of manufacturing an optical attenuator, the method comprising the steps of: forming a photosensitive structure on an auxiliary substrate, the photosensitive structure having a size substantially same as that of a waveguide to be connected with an optical signal transmission line; forming a bonding medium layer on the auxiliary substrate so as to cover the photosensitive structure; separating the auxiliary substrate from the bonding medium layer to form a cavity in one of opposite faces of the bonding medium layer; attaching a support layer to the other of the opposite faces of the bonding medium layer; preparing a silicon substrate provided at a predetermined surface thereof with the waveguide to be connected with the optical signal transmission line; bonding the silicon substrate and the bonding medium layer to each other such that the waveguide of the silicon substrate is inserted into the cavity of the bonding medium layer; and processing the silicon substrate to form an actuator; wherein the bonding medium layer is formed of polydimethylsiloxane (PDMS).