Assignee
AXT INC
US15 patents
Top patents by PatentIndex Score
US6650018B1Nov 18, 2003
High power, high luminous flux light emitting diode and method of making same
AXT INC121 citations95
US6420736B1Jul 16, 2002
Window for gallium nitride light emitting diode
AXT INC38 citations95
US6643304B1Nov 4, 2003
Transparent substrate light emitting diode
AXT INC24 citations91
US6580096B2Jun 17, 2003
Window for light-emitting diode
AXT INC24 citations91
US6495867B1Dec 17, 2002
InGaN/AlGaN/GaN multilayer buffer for growth of GaN on sapphire
AXT INC22 citations90
US7566641B2Jul 28, 2009
Low etch pit density (EPD) semi-insulating GaAs wafers
AXT INC8 citations80
US6459098B1Oct 1, 2002
Window for light emitting diode
AXT INC13 citations72
US6896729B2May 24, 2005
Method and apparatus for growing semiconductor crystals with a rigid support with carbon doping and resistivity control and thermal gradient control
AXT INC14 citations70
US12398486B2Aug 26, 2025
Method and system for vertical gradient freeze 8 inch gallium arsenide substrates
AXT INC1 citations62
US12276044B2Apr 15, 2025
Low etch pit density gallium arsenide crystals with boron dopant
AXT INC0 citations58
US12084790B2Sep 10, 2024
Low etch pit density 6 inch semi-insulating gallium arsenide wafers
AXT INC0 citations58
US11680340B2Jun 20, 2023
Low etch pit density 6 inch semi-insulating gallium arsenide wafers
AXT INC0 citations58
US12054851B2Aug 6, 2024
Low etch pit density, low slip line density, and low strain indium phosphide
AXT INC1 citations56
US11608569B2Mar 21, 2023
Low etch pit density, low slip line density, and low strain indium phosphide
AXT INC1 citations56
US8361225B2Jan 29, 2013
Low etch pit density (EPD) semi-insulating III-V wafers
AXT INC1 citations48