Inventor
SUGIYAMA TOMOHIKO
JP20 patents
⚠️ This page may combine multiple inventors who share the name “SUGIYAMA TOMOHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NGK INSULATORS LTD
10 patentsUS9024325B2May 5, 2015
Epitaxial substrate for semiconductor element, semiconductor element, PN junction diode, and method for manufacturing an epitaxial substrate for semiconductor element
NGK INSULATORS LTD4 citations73
US8378386B2Feb 19, 2013
Epitaxial substrate for semiconductor device, semiconductor device, and method of manufacturing epitaxial substrate for semiconductor device
NGK INSULATORS LTD6 citations73
US9312446B2Apr 12, 2016
Gallium nitride self-supported substrate, light-emitting device and manufacturing method therefor
NGK INSULATORS LTD1 citations63
US9478650B2Oct 25, 2016
Semiconductor device, HEMT device, and method of manufacturing semiconductor device
NGK INSULATORS LTD2 citations62
US8853735B2Oct 7, 2014
Epitaxial substrate for semiconductor device and semiconductor device
NGK INSULATORS LTD2 citations62
US12546031B2Feb 10, 2026
Group III element nitride substrate and production method for group III element nitride substrate
NGK INSULATORS LTD0 citations60
US9893234B2Feb 13, 2018
Composite substrate for light-emitting element and production method therefor
NGK INSULATORS LTD1 citations52
US9548418B2Jan 17, 2017
Gallium nitride self-supported substrate, light-emitting device and manufacturing method therefor
NGK INSULATORS LTD0 citations52
US9196480B2Nov 24, 2015
Method for treating group III nitride substrate and method for manufacturing epitaxial substrate
NGK INSULATORS LTD1 citations51
US10541514B2Jan 21, 2020
Surface-emitting device, vertical external-cavity surface-emitting laser, and method for manufacturing surface-emitting device
NGK INSULATORS LTD0 citations40
MIYOSHI MAKOTO
3 patentsUS9090993B2Jul 28, 2015
Epitaxial substrate comprising a superlattice group and method for manufacturing the epitaxial substrate
MIYOSHI MAKOTO6 citations72
US8410552B2Apr 2, 2013
Epitaxial substrate for semiconductor device, semiconductor device, and method of manufacturing epitaxial substrate for semiconductor device
MIYOSHI MAKOTO5 citations72
US8598626B2Dec 3, 2013
Epitaxial substrate for semiconductor device, schottky junction structure, and leakage current suppression method for schottky junction structure
MIYOSHI MAKOTO0 citations51