Optical waveguide film, method for manufacturing thereof, electrical and optical hybrid circuit film including the waveguide film, and electronic device including thereof

A method for manufacturing an optical waveguide film having a core and a clad comprising a resin and having a light input portion, wherein the optical waveguide film has a portion having a thickness smaller than that of the light input portion, comprising the steps of:

• coating a solution of the core material or the clad material, or a precursor thereof;
• and
• removing a part of the coated solution.

A method for manufacturing an optical waveguide film having a core and a clad comprising a resin and having a light input portion, wherein the optical waveguide film has a portion having a thickness smaller than that of the light input portion, comprising the step of:

• coating a solution of the core material or the clad material, or a precursor thereof using an applicator equipped with an applicator head provided with a film thickness controlling element.