Inventor

TOKUSHIMA MASATOSHI

JP30 patents

⚠️ This page may combine multiple inventors who share the name “TOKUSHIMA MASATOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TOKUSHIMA MASATOSHI

NEC CORP

Photonic crystal

Optical switch having photonic crystal structure

Waveguide comprising a connection of a photonic-crystal line-defect-waveguide to a total reflection confinement waveguide

Method of exposing a lattice pattern onto a photo-resist film

Photonic crystal and its fabrication

Optical measurement element for alignment in wafer-level testing and method for aligning an optical probe using the same

Waveguide coupling structure

Structure of photonic crystal

Microchip, method of manufacturing microchip, and method of detecting compositions

Optical wavelength-demultiplexer with an improved optical lens

Apparatus for making exhaust gas non-toxic

Method of dry etching and apparatus for making exhaust gas non-toxic

Metal-semiconductor junction fet

Optical switch having photonic crystal structure

Method for forming electrodes on mesa structures of a semiconductor substrate

Optical element

Grating coupler with high optical coupling efficiency for SMF

Photonic crystal element

Optical waveguide

TOKUSHIMA MASATOSHI

Optical control device

Optical converter

Optical conversion element and optical conversion element manufacturing method

Polarization rotator and method for manufacturing the same

Wavelength filter

Optical switch

Optical switch and manufacturing method thereof

Optical control device

PHOTONICS ELECTRONICS TECHNOLOGY RES ASS

Optical circuit

Grating structure, and manufacturing method of grating coupler provided therewith

Photodetector having one-dimensional grating structure