国家/地区 韩国（2） 世界知识产权组织（2）
IPC部
IPC大类
IPC小类
IPC
发明人 PARK K S（2）
公开年 2020（2）
申请年 2019（2） 
专利权人 UNIV SEOUL N.（2）

Cold cathode for use in vacuum electronic devices, has cathode base, graphene film, graphene film is doped with tungsten, anode is spaced apart from cathode base, electron gun is emitting electron beam with a higher current density.

PARK G S, SATTOROV M, HONG D P, PARK K S, HONGDONGPYO

Producing tungsten-doped graphene oxide used for preparing film for electron emitter, by mixing graphene oxide solution and tungsten oxide solution, hydrothermally treating solution to form tungsten-doped graphene oxide and heat-treating.

PARK G S, SATTOROV M, HONG D P, PARK K S, HONGDONGPYO