Method of manufacturing nitride semiconductor substrate
First Claim
Patent Images
1. A method of manufacturing a nitride semiconductor substrate, comprising:
- a first step of forming a mask film of a material on which substantially no nitride semiconductor grows and having a plurality of openings on a main surface of a base substrate;
a second step of selectively growing a semiconductor layer of nitride on said base substrate through said mask film; and
a third step of irradiating an interface between said semiconductor layer and said base substrate with a laser beam, thereby separating said semiconductor layer from said base substrate to form a semiconductor substrate from said semiconductor layer.
1 Assignment
0 Petitions
Accused Products
Abstract
A mask film of a material on which substantially no nitride semiconductor grows and having a plurality of openings in a stripe shape is formed on a main surface of a base substrate. Then, on the base substrate, a semiconductor layer of nitride is selectively grown through the mask film. Then, a laser beam is irradiated upon the interface between the semiconductor layer and the base substrate to separate the semiconductor layer from the base substrate, so that a nitride semiconductor substrate is formed from the semiconductor layer.
30 Citations
17 Claims
-
1. A method of manufacturing a nitride semiconductor substrate, comprising:
-
a first step of forming a mask film of a material on which substantially no nitride semiconductor grows and having a plurality of openings on a main surface of a base substrate;
a second step of selectively growing a semiconductor layer of nitride on said base substrate through said mask film; and
a third step of irradiating an interface between said semiconductor layer and said base substrate with a laser beam, thereby separating said semiconductor layer from said base substrate to form a semiconductor substrate from said semiconductor layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method of manufacturing a nitride semiconductor substrate, comprising:
-
a first step of selectively etching a main surface of a base substrate and forming an irregular region on the main surface of said base substrate;
a second step of growing a semiconductor layer of nitride on said irregular region in said base substrate so that a gap is formed between the layer and a recess in the irregular region and the upper surface is flat; and
a third step of irradiating a laser beam upon an interface between said semiconductor layer and said base substrate to separate said semiconductor layer from said base substrate, thereby forming a semiconductor substrate from said semiconductor layer.
-
Specification