Patent ID: 11887802
Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 14:
15. A manufacturing method for an electron emitting element comprising:
a step of forming a first electrode;
a step of forming a first insulation film, which limits a region of an electron emission surface, on a part of a surface of the first electrode;
a step of forming an electron accelerating layer which is made of an insulation film and covers the first electrode and the first insulation film; and
a step of forming a cover film, which transmits electrons, on a region of the electron emission surface of the electron accelerating layer,
wherein the cover film is a hexagonal boron nitride film, and
the hexagonal boron nitride film which covers the electron accelerating layer is formed in the step of forming the cover film by (i) transferring a hexagonal boron nitride film which is formed on a substrate on the region of the electron emission surface of the electron accelerating layer, or (ii) performing a chemical vapor deposition method using diborane and ammonia, boron trichloride and ammonia, ammonia borane, or borazine as raw materials.