Patent ID: 6836583
Filing Date: 2004-12-28
Classification: G02B

Abstract:
A method of fabricating an optical device for propagating an optical signal, the method comprising:providing a first substrate having a first side and a second side; forming a first light guiding structure on the first side of the first substrate, the first light guiding structure comprising a different material than the first substrate; forming a dielectric layer on the first substrate or on a second substrate; etching a cavity to remove a portion of the dielectric layer and a portion of the second substrate; bonding the first substrate to the second substrate such that the dielectric layer is located between the first and second substrates and the first light guiding structure resides in the cavity; reducing the thickness of the second side of the first substrate; depositing a second material on the second side of the first substrate such that the deposited second material substantially cancels the effect of thermal stress on the first light guiding structure; and processing the first substrate to form a suspended structure which is adapted to move relative to the second substrate, the suspended structure having the first light guiding structure.