ClassID:

204508

H01J3/021 - CPC Classification

Classification description:

Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps; Electron guns Electron guns using a field emission, photo emission, or secondary emission electron source

Sub-classes:
Recent Application in this class:
#1
20260128249
2026-05-07

ELECTRON SOURCE

#2
20250364200
2025-11-27

ELECTRON SOURCE, ELECTRONIC DEVICE, AND ELECTRON EMISSION METHOD

#3
20240266134
2024-08-08

Electron emitter structure, external photoelectric effect emitter, particle collecting device, tunnel surface emitter, semiconductor- based direct emitter and liquid ioniser comprising same, gas sensor comprising an emitter or emitter structure, method for generating free electrons, and method for collecting particles

#4
20230411101
2023-12-21

Field emission cathode device and method of forming a field emission cathode device

#5
20230402246
2023-12-14

ELECTRON GUN AND ELECTRON BEAM APPLICATION DEVICE

#6
20230393074
2023-12-07

Concurrent laser cleaning and spectroscopic cleanliness monitoring

#7
20220367139
2022-11-17

Pulsed generator of electrically charged particles and method for using a pulsed generator of electrically charged particles

#8
20220359146
2022-11-10

Electron gun, electron beam applicator, emission axis verification method for electron beam emitted from photocathode, and emission axis alignment method for electron beam emitted from photocathode

#9
20220199350
2022-06-23

ELECTRON BEAM APPLICATION DEVICE, AND ELECTRON BEAM EMISSION METHOD FOR ELECTRON BEAM APPLICATION DEVICE

#10
20210398768
2021-12-23

Electron photoinjector

#11
20210375578
2021-12-02

Incident axis alignment method for electron gun equipped with photocathode, computer program, and electron gun equipped with photocathode

#12
20210241990
2021-08-05

Method of operating a charged particle gun, charged particle gun, and charged particle beam device

#13
20210193425
2021-06-24

Electron emission source based on graphene layer and method for making the same

#14
20210134551
2021-05-06

Electron gun, electron beam applicator, method for releasing electrons using electron gun, and method for adjusting focal position of electron beam

#15
20210050176
2021-02-18

Method of manufacturing electron source

#16
20210050175
2021-02-18

Electron source and electron gun

#17
20210035766
2021-02-04

Electron beam generator and electron beam applicator

#18
20200388459
2020-12-10

SILICON FIELD EFFECT EMITTER

#19
20200083014
2020-03-12

Electron photoinjector

#20
20200020501
2020-01-16

Chip Scale Encapsulated Vacuum Field Emission Device Integrated Circuit and Method of Fabrication Therefor

#21
20190333730
2019-10-31

Field emission device and field emission method

#22
20190304732
2019-10-03

Electron emission device and method for manufacturing the same

#23
20190259561
2019-08-22

Tunable charged particle vortex beam generator and method

#24
20190189383
2019-06-20

Devices having an electron emitting structure

#25
20180301324
2018-10-18

Optical modulation of on-chip thermionic emission using resonant cavity coupled electron emitters

#26
20180019088
2018-01-18

Apparatus for generating x-ray radiation in an external magnetic field

#27
20170352516
2017-12-07

Detecting system based on terahertz wave

#28
20170323755
2017-11-09

Applications of graphene grids in vacuum electronics

#29
20170062170
2017-03-02

Tera Hertz reflex klystron

#30
20160148776
2016-05-26

Field emission device with ground electrode

#31
20160148774
2016-05-26

Field-emission device with improved beams-convergence

#32
20160013005
2016-01-14

Field emission cathode and field emission device

#33
20150243468
2015-08-27

Applications of graphene grids in vacuum electronics

#34
20150213992
2015-07-30

Electronic device multi-layer graphene grid

#35
20150179389
2015-06-25

Performance optimization of a field emission device

#36
20150179386
2015-06-25

Field emission device with nanotube or nanowire grid

#37
20150092923
2015-04-02

Devices having an electron emitting structure

#38
20150016842
2015-01-15

Charger, ion generator, image forming apparatus, and process cartridge

#39
20140346368
2014-11-27

Gun configured to generate charged particles

#40
20140346353
2014-11-27

Charged particle vortex wave generation

#41
20140270087
2014-09-18

X-ray generator including heat sink block

#42
20140191650
2014-07-10

Electric field emitting source, element using same, and production method therefor

#43
20140159566
2014-06-12

Field emission cathode device and field emission equipment using the same

#44
20140117837
2014-05-01

Vacuum encapsulated hermetically sealed diamond amplified cathode capsule and method for making same

#45
20140097741
2014-04-10

Field emission electron source and field emission device

#46
20140034844
2014-02-06

Non-radioactive ion source using high energy electrons

#47
20140010347
2014-01-09

Mesh electrode adhesion structure, electron emission device and electronic apparatus including the electron emission device

#48
20130320295
2013-12-05

Vacuum encapsulated, high temperature diamond amplified cathode capsule and method for making same

#49
20130280830
2013-10-24

Method for manufacturing a carbon nanotube field emission device with overhanging gate

#50
20130230146
2013-09-05

Electron emission device and X-ray generator including the same

#51
20130214244
2013-08-22

Carbon nanotube field emission devices and methods of making same

#52
20130187541
2013-07-25

Photocathode high-frequency electron-gun cavity apparatus

#53
20130169193
2013-07-04

Performance optimization of a field emission device

#54
20130169142
2013-07-04

Electronic device graphene grid

#55
20130082588
2013-04-04

Field emission device and field emission display having same

#56
20130032716
2013-02-07

Electron beam apparatus and a device manufacturing method by using said electron beam apparatus

#57
20120306348
2012-12-06

Field emitter

#58
20120286692
2012-11-15

Electron source

#59
20120257723
2012-10-11

ELECTRON BEAM GENERATOR AND X-RAY GENERATOR INCLUDING THE SAME

#60
20120223245
2012-09-06

ELECTRON BEAM SOURCE SYSTEM AND METHOD

#61
20120212120
2012-08-23

Liquid metal wetting of micro-fabricated charge-emission structures

#62
20120153802
2012-06-21

Field emission cathode device and field emission display using the same

#63
20110287684
2011-11-24

Method for making field emission device

#64
20110285271
2011-11-24

Field emission device having secondary electron enhancing electrode

#65
20110140074
2011-06-16

ROOM TEMPERATURE DISPENSER PHOTOCATHODE

#66
20110115363
2011-05-19

Electron emitter and field emission device provided with electron emitter

#67
20110089397
2011-04-21

Spin-polarized electron source

#68
20110084590
2011-04-14

ELECTRON-EMITTING DEVICE, ELECTRON BEAM APPARATUS AND IMAGE DISPLAY APPARATUS

#69
20110074744
2011-03-31

ELECTRON-EMITTING DEVICE, DISPLAY PANEL, AND IMAGE DISPLAY APPARATUS

#70
20110057566
2011-03-10

Pulsed electron source, power supply method for pulsed electron source and method for controlling a pulsed electron source

#71
20110057565
2011-03-10

Device and method of supplying power to an electron source, and ion-bombardment-induced secondary-emission electron source

#72
20110057164
2011-03-10

CARBON NANOTUBE FIELD EMISSION DEVICE WITH OVERHANGING GATE

#73
20100252804
2010-10-07

Cathode assembly containing an ultraviolet light-blocking dielectric layer

#74
20100237763
2010-09-23

Cold Cathode Electron Emission Source and Method for Manufacture of the Same

#75
20100201247
2010-08-12

Electron emitting device and image displaying apparatus using the same

#76
20100072878
2010-03-25

High frequency, cold cathode, triode-type, field-emitter vacuum tube and process for manufacturing the same

#77
20100045166
2010-02-25

ELECTRON EMITTING DEVICE AND LIGHT EMITTING DEVICE THEREWITH

#78
20100019647
2010-01-28

Field emission cathode device and field emission display using the same

#79
20100013365
2010-01-21

CATHODE STRUCTURE FOR FLAT-PANEL DISPLAY WITH REFOCUSING GATE

#80
20100007263
2010-01-14

Field emission cathode and field emission display employing with same

#81
20090325452
2009-12-31

CATHODE SUBSTRATE HAVING CATHODE ELECTRODE LAYER, INSULATOR LAYER, AND GATE ELECTRODE LAYER FORMED THEREON

#82
20090304157
2009-12-10

Field emission cathode and x-ray tube embodying same

#83
20090278434
2009-11-12

Liquid metal wetting of micro-fabricated charge-emission structures

#84
20090273298
2009-11-05

Field emission apparatus and driving method thereof

#85
20090195138
2009-08-06

Electron emission device and display device using the same

#86
20090189508
2009-07-30

BACKLIGHT UNIT

#87
20090185661
2009-07-23

Virtual matrix control scheme for multiple spot X-ray source

#88
20090146547
2009-06-11

Field electron emission source

#89
20090140629
2009-06-04

Cathode planes for field emission devices

#90
20090115305
2009-05-07

Triodes using nanofabric articles and methods of making the same

#91
20090072705
2009-03-19

Electron emission device, electron emission type backlight unit including the electron emission device, and method of manufacturing the electron emission device

#92
20090033196
2009-02-05

Electron emission source, electron emission device and method of preparing the electron emission source

#93
20090009053
2009-01-08

FIELD EMISSION DEVICE ARRAY SUBSTRATE AND FABRICATING METHOD THEREOF

#94
20080187093
2008-08-07

X-RAY GENERATION USING SECONDARY EMISSION ELECTRON SOURCE

#95
20080129178
2008-06-05

Gated nanorod field emitter structures and associated methods of fabrication

#96
20080116782
2008-05-22

LIGHT EMISSION DEVICE AND DISPLAY DEVICE

#97
20080030117
2008-02-07

Field emission microelectronic device

#98
20080029145
2008-02-07

Diamond-like carbon thermoelectric conversion devices and methods for the use and manufacture thereof

#99
20080023642
2008-01-31

Electron gun assembly

#100
20070235717
2007-10-11

Photovoltaic device and lamp and display using the photovoltaic device

#101
20070228286
2007-10-04

Polarized pulsed front-end beam source for electron microscope

#102
20070224429
2007-09-27

Dielectric and display device having a dielectric and dielectric manufacturing method

#103
20070222393
2007-09-27

ELECTRON EMITTING DEVICE

#104
20070194689
2007-08-23

Electron emission device and electron emission display using the same

#105
20070188091
2007-08-16

Mesh structure and field-emission electron source apparatus using the same

#106
20070188090
2007-08-16

Field-emission electron source apparatus

#107
20070181833
2007-08-09

Secondary emission electron gun using external primaries

#108
20070176206
2007-08-02

Method of manufacturing field emission device

#109
20070141736
2007-06-21

Field emission device with self-aligned gate electrode structure, and method of manufacturing same

#110
20070126312
2007-06-07

DLC field emission with nano-diamond impregnated metals

#111
20070123134
2007-05-31

Method for preventing electron emission from defects in a field emission device

#112
20070096624
2007-05-03

Electron emission device

#113
20070096617
2007-05-03

Composition for forming insulating layer or electron emission source, and electron emission device including insulating layer or electron emission source formed using the composition

#114
20070080647
2007-04-12

Hybrid multibeam electronic emission device with controlled divergence

#115
20070063629
2007-03-22

Field emitters and devices

#116
20070029935
2007-02-08

Electron emission device

#117
20070029922
2007-02-08

Electron emission device having electrodes with line portions and subsidiary electrode

#118
20070029911
2007-02-08

Gated nanorod field emitter structures and associated methods of fabrication

#119
20070024545
2007-02-01

Electron emission type backlight unit and flat panel display device having the same

#120
20070024178
2007-02-01

Field emission device having insulated column lines and method of manufacture

#121
20070018565
2007-01-25

Electron emission device, electron emission type backlight unit and flat display apparatus having the same

#122
20070018553
2007-01-25

Electron emission device, electron emission type backlight unit and flat display apparatus having the same

#123
20060290259
2006-12-28

Field emission device and field emission display device using the same

#124
20060274889
2006-12-07

Method and apparatus for controlling electron beam current

#125
20060267478
2006-11-30

Field emission device (FED)

#126
20060267476
2006-11-30

Electron emission device

#127
20060261725
2006-11-23

Electron emission device, electron emission display, and manufacturing method of the electron emission device

#128
20060246813
2006-11-02

Electron emission device, method for manufacturing the device, and electron emission display using the same

#129
20060238108
2006-10-26

Electron emission device with multilayered insulating layers

#130
20060232190
2006-10-19

Electron emission device and method for manufacturing the same

#131
20060220527
2006-10-05

Electron emission device, electron emission display device using the same and method of manufacturing the same

#132
20060220523
2006-10-05

Electron emission device and electron emission display device

#133
20060214561
2006-09-28

Electron emitting device, electron source, image display apparatus and image receiving display apparatus

#134
20060208621
2006-09-21

Field emitter cathode backplate structures for display panels

#135
20060194156
2006-08-31

Method for forming patterned insulating elements and methods for making electron source and image display device

#136
20060186787
2006-08-24

Cathode substrate for electron emission device and electron emission device with the same

#137
20060184843
2006-08-17

Data recording using carbon nanotube electron sources

#138
20060175952
2006-08-10

Field emission display device and method of manufacturing the same

#139
20060163995
2006-07-27

Gun with a cold cathode

#140
20060097200
2006-05-11

Electron beam apparatus and a device manufacturing method by using said electron beam apparatus

#141
20060066217
2006-03-30

Cathode structure for field emission device

#142
20060061285
2006-03-23

High power, long focus electron source for beam processing

#143
20060055321
2006-03-16

Hetero-junction electron emitter with Group III nitride and activated alkali halide

#144
20060043875
2006-03-02

Electron emission device and method of manufacturing the same

#145
20060033417
2006-02-16

Secondary emission electron gun using external primaries

#146
20060028111
2006-02-09

Field emission device and field emission display using the same having a concave-shaped cathode to enhance electron focusing

#147
20060022598
2006-02-02

Field emission cathode gating for RF electron guns and planar focusing cathodes

#148
20060022575
2006-02-02

Electron emission device having openings with improved aspect ratio and method of manufacturing

#149
20060006807
2006-01-12

Field emission cathode gating for RF electron guns and planar focusing cathodes

#150
20060001359
2006-01-05

Electron emission device and method for manufacturing the same

#151
20060001350
2006-01-05

Field emission electron gun and electron beam apparatus using the same

#152
20050264156
2005-12-01

Electron emission device including conductive layers for preventing accumulation of static charge

#153
20050248257
2005-11-10

Electron emission device and electron emission display using the same

#154
20050242704
2005-11-03

Electron emission device

#155
20050236962
2005-10-27

Negative hole structure having a protruded portion and electron emission device including the same

#156
20050230750
2005-10-20

Cathode substrate and its manufacturing method

#157
20050218789
2005-10-06

Electron emission device with a grid electrode and electron emission display having the same

#158
20050218787
2005-10-06

Electron emission device and electron emission display including the same

#159
20050212398
2005-09-29

Thread-type electron emission element

#160
20050194887
2005-09-08

Field emission device and field emission display including dual cathode electrodes

#161
20050189869
2005-09-01

Electron emission device having curved surface electron emission region

#162
20050184647
2005-08-25

Electron emission device

#163
20050184646
2005-08-25

Electron emission device and method of manufacturing the same

#164
20050111625
2005-05-26

RF accelerator for imaging applications

#165
20050092929
2005-05-05

Integrated sub-nanometer-scale electron beam systems

#166
20050067938
2005-03-31

Carbon nano-tube field emission display having strip shaped gate

#167
20050035701
2005-02-17

Field emission display having carbon nanotube emitter and method of manufacturing the same

#168
20050019707
2005-01-27

Method for forming patterned insulating elements and methods for making electron source and image display device

#169
20050018467
2005-01-27

Electronic switching device

#170
20050017648
2005-01-27

Display device

#171
16777276
2020-12-08

Method of operating a charged particle gun, charged particle gun, and charged particle beam device