Patent ID: 9722042
Date: 2017-08-01
CPC Classifications: H01L

Claim:
1. The method for fabricating a group-III nitride semiconductor device, comprising steps of: etching a stack structure with a depth between 250 nm and 1000 nm, and forming a first semiconductor stack structure and a second semiconductor stack structure; performing a first surface oxidation process; coating an ohmic metal layer, removing said ohmic metal layer, forming a first source and a first drain on said first semiconductor stack structure, and forming a second source and a second drain on said second semiconductor stack structure; defining fluorine-ion injection regions on said second semiconductor stack structure, and injecting fluorine ions; performing thermal treatment for fluorine ions and a second surface oxidation process; coating an insulating layer, etching said insulating layer, forming a first gate insulating layer between said first source and said first drain, and forming a second gate insulating layer between said second source and said second drain; coating a Schottky metal layer, removing said Schottky metal layer, forming a first gate on said first gate insulating layer, and forming a second gate on said second gate insulating layer; and coating a passivation film, and forming a plurality of openings on said passivation film corresponding to said first drain, said second gate, and said second source, respectively.