Patent ID: 11862477
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for manufacturing a semiconductor device having a gallium oxide-based semiconductor layer, the method comprising:
ion-implanting dopant into the gallium oxide-based semiconductor layer while heating the gallium oxide-based semiconductor layer; and
after the ion-implanting, annealing the gallium oxide-based semiconductor layer under an oxygen atmosphere, wherein
a dopant concentration of the dopant ion-implanted in the ion-implanting is 1×1020 cm−3 or more,
in the ion-implanting, the gallium oxide-based semiconductor layer is heated at a temperature equal to or higher than 500 degrees Celsius and equal to or less than 1200 degrees Celsius, and
in the annealing, the gallium oxide-based semiconductor layer is heated at a temperature equal to or higher than 1000 degrees Celsius and equal to or less than 1200 degrees Celsius.