Patent ID: 7366381

Claim:
A method for manufacturing an optical waveguide chip comprising a core portion as an optical waveguide, a clad portion, which is composed of a lower clad layer and an upper clad layer and which is formed around the core portion, and an optical fiber guide portion for positioning an optical fiber which is to be connected with the core portion, each appropriately positioned on a supporting substrate, comprising: forming said core portion, said clad portion, which is composed of said lower clad layer and said upper clad layer, and said optical fiber guide portion from appropriately positioned radiation-sensitive polysiloxane composition on the substrate, whereby the patterning of the positioned radiation-sensitive polysiloxane composition into the components of the optical waveguide components is developed by treatment with an alkali developing agent; and wherein the upper clad layer and the optical fiber guide portion are formed simultaneously as they are patterned during the alkali development.