Patent ID: 7323352
Filing Date: 2008-01-29
Classification: G02B

Abstract:
1. A process for making a light waveguide element mounted on a mount board along with an optical fiber and photoelectric components, comprises the steps of: forming a core as a light path on a substrate serving as a lower clad layer; and forming a T-shaped upper clad layer having a central section elevated from opposite-side optical axis height-adjusting sections to cover said core, said T-shaped clad layer-forming step comprises the steps of: forming both said core and a first height-adjusting layer on said substrate; patterning an etching stopper film on said first height-adjusting layer; forming a first upper clad layer over an entire surface including said core and said etching stopper film; forming an etching mask on said first clad layer to cover an area above said core; etching off a portion of said first upper clad layer that is other than said area covered by said etching mask until said etching stopper film is exposed; removing only said etching mask; and forming a second upper clad layer over an entire surface including said etching stopper film, said first upper clad layer.