公开(公告)号：US09786466B2

公开(公告)日：2017-10-10

申请号：US14944022

申请日：2015-11-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jun Tae Kang ,  Yoon Ho Song ,  Jin Woo Jeong

IPC: H01J1/304 ,  H01J35/16 ,  G21K1/10 ,  H01J35/06

CPC classification number: H01J35/16 ,  G21K1/10 ,  H01J35/065

Abstract: The present disclosure may provide a micro X-ray tube with a filter tube to filter X-rays and at the same time to serve as an insulator. For this, the X-ray tube may include a filter tube between a second electrode and a gate electrode, hence separating from each other. The second electrode may have a target and the gate electrode may accelerate an electron-beam to collide with the target. The filter tube includes an alumina (Al2O3). The target is inclined to allow the X-rays to be directed toward the filter tube.

公开(公告)号：US09666401B2

公开(公告)日：2017-05-30

申请号：US14929792

申请日：2015-11-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： So Ra Park ,  Yoon Ho Song ,  Jin Woo Jeong ,  Jae Woo Kim ,  Min Sik Shin

IPC: H01J21/10 ,  H01J3/02 ,  H01J29/46 ,  H01J19/24

CPC classification number: H01J3/021 ,  H01J29/46 ,  H01J29/467 ,  H01J2203/0216 ,  H01J2203/0232

Abstract: The present disclosure may provide a field emission device with an enhanced beam convergence. For this, the device may include a gate structure disposed between a cathode electrode and an anode electrode, wherein the gate structure includes a gate electrode and an atomic layer sheet disposed on the gate electrode, the gate electrode facing an emitter and having at least one aperture formed therein.

公开(公告)号：US10438765B2

公开(公告)日：2019-10-08

申请号：US14943996

申请日：2015-11-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jin Woo Jeong ,  Yoon Ho Song ,  Jun Tae Kang ,  Jae Woo Kim

IPC: H01J35/04 ,  H01J29/46 ,  H01J3/02 ,  H01J35/06

Abstract: Provided herein is a field emission device. The field emission device includes a cathode which is connected to a negative power supply and emits electrons, an anode which is connected to a positive power supply and includes a target material receiving the electrons emitted from the cathode, and a ground electrode which is formed to face the anode and has an opening through which the electrons emitted from the cathode pass. The ground electrode is grounded so that when an arc discharge occurs due to high voltage operation of the anode, electric charge produced by the arc discharge is emitted to a ground.