Inventor · El Segundo, CA, US

Niraj Ranjan

24Patents
7h-index
24Co-inventors
69Inventor score

Filing activity: Nov 17, 1995 → Sep 16, 2019

Most-cited inventions

PatentTitleAreaCited byStatus
US5801418A High voltage power integrated circuit with level shift operation and without metal crossover Electricity 35 Expired
US6380004B2 Process for manufacturing radhard power integrated circuit Emerging Cross-Sectional Technologies 35 Expired
US6529034B1 Integrated series schottky and FET to allow negative drain voltage Electricity 16 Expired
US5801431A MOS gated semiconductor device with source metal covering the active gate Electricity 14 Expired
US5861657A Graded concentration epitaxial substrate for semiconductor device having resurf diffusion Electricity 13 Expired
US6707101B2 Integrated series schottky and FET to allow negative drain voltage Electricity 12 Expired
US5686754A Polysilicon field ring structure for power IC Electricity 10 Expired
US5798538A IGBT with integrated control Electricity 7 Expired
US8860194B2 Buck converter power package Emerging Cross-Sectional Technologies 6 Active
US7183626B2 Passivation structure with voltage equalizing loops Emerging Cross-Sectional Technologies 6 Expired
US8878591B2 Level shifter utilizing bidirectional signaling through a capacitive isolation barrier Electricity 4 Active
US9245985B2 IGBT with buried emitter electrode Electricity 4 Active
US9859407B2 IGBT having deep gate trench Electricity 2 Active
US9299819B2 Deep gate trench IGBT Electricity 2 Active
US9590096B2 Vertical FET having reduced on-resistance Electricity 2 Active
US9496378B2 IGBT with buried emitter electrode Electricity 1 Active
US8988128B2 Level shifter having feedback signal from high voltage circuit Electricity 1 Active
US10879230B2 Schottky integrated high voltage terminations and related HVIC applications Electricity 0 Active
US9991377B2 Trench FET with ruggedness enhancement regions Electricity 0 Active
US9653597B2 Method for fabricating a shallow and narrow trench FET and related structures Electricity 0 Active
US9257983B2 Level shifter utilizing a capacitive isolation barrier Electricity 0 Active
US9818743B2 Power semiconductor device with contiguous gate trenches and offset source trenches Electricity 0 Active
US8076672B2 Passivation structure with voltage equalizing loops Emerging Cross-Sectional Technologies 0 Active
US11217690B2 Trench field electrode termination structure for transistor devices Electricity 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.