公开(公告)号：US11984294B2

公开(公告)日：2024-05-14

申请号：US17622994

申请日：2020-06-29

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Jie Tang ,  Shuai Tang ,  Ta-Wei Chiu ,  Wataru Hayami ,  Luchang Qin

IPC: H01J37/065

CPC classification number: H01J37/065 ,  H01J2237/06316 ,  H01J2237/06341

Abstract: The present invention provides an emitter made of a hafnium carbide (HfC) single crystal that stably emits electrons with high efficiency, a method for manufacturing the emitter, and an electron gun and an electronic device using the emitter. An emitter according to an embodiment of the present invention is an emitter including a nanowire, in which the nanowire is made of the hafnium carbide (HfC) single crystal, at least an end of the nanowire through which electrons are to be emitted is coated with hafnium oxycarbide (HfC1-xOx: 0