ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,770,820, issued on Oct. 20, was assigned to HITACHI HIGH-TECH Corp. (Tokyo).
"Electron gun and electron microscope" was invented by Hideo Morishita (Tokyo), Takashi Ohshima (Tokyo), Tatsuro Ide (Tokyo), Naohiro Kohmu (Tokyo), Toshihide Agemura (Tokyo), Yoichi Ose (Tokyo) and Junichi Katane (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Examples include a photoelectric film that emits electrons by irradiation of an excitation light, an extraction electrode for extracting emitted electrons, and a differential exhaust diaphragm through which extracted electrons pass. A control unit controls an electric field formed in relation to the extraction elec...