Patent ID: 11862687
Assignee: FUJI ELECTRIC CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A nitride semiconductor device, comprising:
a first nitride semiconductor layer of a first conductivity-type;
a second nitride semiconductor layer of a second conductivity-type provided above the first nitride semiconductor layer;
a junction region of the first conductivity-type which is provided to extend in a direction from a front surface of the second nitride semiconductor layer to the first nitride semiconductor layer and has a first type dopant implanted therein at a doping concentration NJFET equal to or higher than a doping concentration of the first nitride semiconductor layer, the first type dopant being oxygen, a dose DoseJFET in the junction region meeting a condition in which a width WJFET (μm) of the junction region is used: 1.3×1013×exp(−1.15×WJFET) cm−2≤DoseJFET≤1.3×1014×exp(−0.75×WJFET) cm−2; and
a source region of the first conductivity-type which is provided more shallowly than the junction region and has a second type dopant implanted therein at a doping concentration equal to or higher than the doping concentration NJFET of the first type dopant in the junction region, wherein
the second type dopant implanted in the source region is an element with an atomic weight larger than an atomic weight of the first type dopant implanted in the junction region.