Patent ID: 6661939
Filing Date: 2003-12-09
Classification: G02B,H01L

Abstract:
An optical module comprising:a substrate having an electric circuit formed thereon; a surface light receiving optical element or surface light emitting optical element flip-chip mounted on the substrate so that a light-receiving surface or light-emitting surface thereof faces the substrate side; an optical waveguide formed on the substrate, the optical waveguide having a core portion and a clad portion optically connected to the surface light receiving optical element or the surface light emitting optical element; and underfill resin filled in between the substrate and the light-receiving surface or between the substrate and the light-emitting surface, the underfill resin covering an optical junction between the surface light receiving optical element or the surface light emitting optical element and the optical waveguide, wherein the underfill resin is of an electrically insulating material and has a refractive index equal to or smaller than a refractive index of the clad portion of the optical waveguide.