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IPC entry: H01J 37/20 2-dot subgroup [Version 2025.01 (current), Language EN - English]

Symbol Select IPC entry Title
A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONS; TRANSPORTING
C
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CHEMISTRY; METALLURGY
D
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TEXTILES; PAPER
E
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FIXED CONSTRUCTIONS
F
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MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
G
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PHYSICS
H
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ELECTRICITY
H01
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ELECTRIC ELEMENTS
H01B
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CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F 1/00; waveguides H01P)
H01C
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RESISTORS
H01F
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MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES [2]
H01G
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CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE  (selection of specified materials as dielectric H01B 3/00;  capacitors having potential barriers H10D 1/62, H10K 10/10)
H01H
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ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B 7/10;  electrolytic self-interrupters H01G 9/18;  emergency protective circuit arrangements H02H;  switching by electronic means without contact-making H03K 17/00)
H01J
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ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; arc lamps with consumable electrodes H05B; particle accelerators H05H)
H01J 1/00
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Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps (details of electron-optical arrangements or of ion traps H01J 3/00) [1, 2006.01]
H01J 3/00
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Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps [1, 2006.01]
H01J 5/00
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Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps [1, 2006.01]
H01J 7/00
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Details not provided for in groups H01J 1/00-H01J 5/00 and common to two or more basic types of discharge tubes or lamps [1, 2006.01]
H01J 9/00
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Apparatus or processes specially adapted for the manufacture of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps [1, 7, 2006.01]
H01J 11/00
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Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP] (circuits or methods for driving PDPs G09G 3/28); Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel [1, 2006.01, 2012.01]
H01J 13/00
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Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes [1, 2006.01]
H01J 15/00
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Gas-filled discharge tubes with gaseous cathodes, e.g. plasma cathodes [1, 2006.01]
H01J 17/00
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Gas-filled discharge tubes with solid cathodes (H01J 25/00, H01J 27/00, H01J 31/00-H01J 41/00 take precedence; gas filled spark gaps H01T; Marx converters H02M 7/26) [1, 2006.01]
H01J 19/00
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Details of vacuum tubes of the types covered by group H01J 21/00 [1, 2006.01]
H01J 21/00
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Vacuum tubes (H01J 25/00, H01J 31/00-H01J 40/00, H01J 43/00, H01J 47/00, H01J 49/00 take precedence; details of vacuum tubes H01J 19/00) [1, 2006.01]
H01J 23/00
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Details of transit-time tubes of the types covered by group H01J 25/00 [1, 2006.01]
H01J 25/00
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Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons (details of transit-time tubes H01J 23/00; particle accelerators H05H) [1, 2006.01]
H01J 27/00
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Ion beam tubes (H01J 25/00, H01J 33/00, H01J 37/00 take precedence; particle accelerators H05H) [1, 2006.01]
H01J 29/00
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Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J 31/00 [1, 2006.01]
H01J 31/00
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Cathode-ray tubes; Electron-beam tubes (H01J 25/00, H01J 33/00, H01J 35/00, H01J 37/00 take precedence;  details of cathode-ray tubes or of electron-beam tubes H01J 29/00) [1, 2006.01]
H01J 33/00
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Discharge tubes with provision for emergence of electrons or ions from the vessel (particle accelerators H05H); Lenard tubes [1, 2006.01]
H01J 35/00
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X-ray tubes [1, 2006.01]
H01J 37/00
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Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof (H01J 33/00, H01J 40/00, H01J 41/00, H01J 47/00, H01J 49/00 take precedence) [1, 2, 5, 2006.01]
H01J 37/02
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.Details [1, 2006.01]
H01J 37/04
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. .Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement [1, 2006.01]
H01J 37/05
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. . .Electron- or ion-optical arrangements for separating electrons or ions according to their energy (particle separator tubes H01J 49/00) [3, 2006.01]
H01J 37/06
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. . .Electron sources; Electron guns [1, 2006.01]
H01J 37/063
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. . . .Geometrical arrangement of electrodes for beam-forming [3, 2006.01]
H01J 37/065
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. . . .Construction of guns or parts thereof (H01J 37/067-H01J 37/077 take precedence) [3, 2006.01]
H01J 37/067
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. . . .Replacing parts of guns; Mutual adjustment of electrodes (H01J 37/073-H01J 37/077 take precedence; vacuum locks H01J 37/18) [3, 2006.01]
H01J 37/07
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. . . .Eliminating deleterious effects due to thermal effects or electric or magnetic fields  (H01J 37/073-H01J 37/077 take precedence) [3, 2006.01]
H01J 37/073
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. . . .Electron guns using field emission, photo emission, or secondary emission electron sources [3, 2006.01]
H01J 37/075
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. . . .Electron guns using thermionic emission from cathodes heated by particle bombardment or by irradiation, e.g. by laser [3, 2006.01]
H01J 37/077
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. . . .Electron guns using discharge in gases or vapours as electron sources [3, 2006.01]
H01J 37/08
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. . .Ion sources; Ion guns [1, 2006.01]
H01J 37/09
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. . .Diaphragms; Shields associated with electron- or ion-optical arrangements; Compensation of disturbing fields [3, 2006.01]
H01J 37/10
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. . .Lenses [1, 2006.01]
H01J 37/12
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. . . .electrostatic [1, 2006.01]
H01J 37/14
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. . . .magnetic [1, 2006.01]
H01J 37/141
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. . . . .Electromagnetic lenses [3, 2006.01]
H01J 37/143
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. . . . .Permanent magnetic lenses [3, 2006.01]
H01J 37/145
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. . . .Combinations of electrostatic and magnetic lenses [3, 2006.01]
H01J 37/147
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. . .Arrangements for directing or deflecting the discharge along a desired path (lenses H01J 37/10) [2, 2006.01]
H01J 37/15
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. . . .External mechanical adjustment of electron- or ion-optical components (H01J 37/067, H01J 37/20 take precedence) [3, 2006.01]
H01J 37/153
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. . .Electron-optical or ion-optical arrangements for the correction of image defects, e.g. stigmators [2, 2006.01]
H01J 37/16
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. .Vessels; Containers [1, 2006.01]
H01J 37/18
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. .Vacuum locks [1, 2006.01]
H01J 37/20
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. .Means for supporting or positioning the object or the material; Means for adjusting diaphragms or lenses associated with the support [1, 2006.01]
H01J 37/21
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. .Means for adjusting the focus [2, 2006.01]
H01J 37/22
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. .Optical or photographic arrangements associated with the tube [1, 2006.01]
H01J 37/24
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. .Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for [1, 2006.01]
H01J 37/244
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. .Detectors; Associated components or circuits therefor [3, 2006.01]
H01J 37/248
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. .Components associated with high voltage supply [3, 2006.01]
H01J 37/252
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.Tubes for spot-analysing by electron or ion beams; Microanalysers [3, 2006.01]
H01J 37/256
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. .using scanning beams [3, 2006.01]
H01J 37/26
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.Electron or ion microscopes; Electron- or ion-diffraction tubes [1, 2, 2006.01]
H01J 37/27
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. .Shadow microscopy [3, 2006.01]
H01J 37/28
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. .with scanning beams [1, 2006.01]
H01J 37/285
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. .Emission microscopes, e.g. field-emission microscopes [2, 2006.01]
H01J 37/29
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. .Reflection microscopes [2, 2006.01]
H01J 37/295
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. .Electron- or ion-diffraction tubes [2, 2006.01]
H01J 37/30
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.Electron-beam or ion-beam tubes for localised treatment of objects [1, 2006.01]
H01J 37/301
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. .Arrangements enabling beams to pass between regions of different pressure [3, 2006.01]
H01J 37/302
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. .Controlling tubes by external information, e.g. programme control (H01J 37/304 takes precedence) [3, 2006.01]
H01J 37/304
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. .Controlling tubes by information coming from the objects, e.g. correction signals [3, 2006.01]
H01J 37/305
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. .for casting, melting, evaporating, or etching [2, 2006.01]
H01J 37/31
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. .for cutting or drilling [2, 2006.01]
H01J 37/315
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. .for welding [2, 2006.01]
H01J 37/317
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. .for changing properties of the objects or for applying thin layers thereon, e.g. ion implantation (H01J 37/36 takes precedence) [3, 2006.01]
H01J 37/32
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.Gas-filled discharge tubes (heating by discharge H05B) [1, 2006.01]
H01J 37/34
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. .operating with cathodic sputtering (H01J 37/36 takes precedence) [1, 3, 2006.01]
H01J 37/36
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. .for cleaning surfaces while plating with ions of materials introduced into the discharge, e.g. introduced by evaporation [3, 2006.01]
H01J 40/00
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Photoelectric discharge tubes not involving the ionisation of a gas (H01J 49/00 takes precedence) [3, 2006.01]
H01J 41/00
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Discharge tubes and means integral therewith for measuring gas pressure; Discharge tubes for evacuation by diffusion of ions [1, 2006.01]
H01J 43/00
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Secondary-emission tubes; Electron-multiplier tubes (dynamic electron-multiplier tubes H01J 25/76) [1, 2006.01]
H01J 45/00
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Discharge tubes functioning as thermionic generators [1, 2006.01]
H01J 47/00
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Tubes for determining the presence, intensity, density or energy of radiation or particles (photoelectric discharge tubes not involving the ionisation of a gas H01J 40/00) [3, 2006.01]
H01J 49/00
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Particle spectrometers or separator tubes [3, 2006.01]
H01J 61/00
Discharge lamps
H01J 61/00
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Gas-discharge or vapour-discharge lamps (arc lamps with consumable electrodes H05B; electroluminescent lamps H05B) [1, 2006.01]
H01J 63/00
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Cathode-ray or electron-stream lamps [1, 2006.01]
H01J 65/00
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Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel [1, 2006.01]
H01J 99/00
H01J 99/00
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Subject matter not provided for in other groups of this subclass [2006.01]
H01K
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ELECTRIC INCANDESCENT LAMPS (details, apparatus or processes for manufacture applicable to both discharge devices and incandescent lamps H01J;  light sources using a combination of incandescent and other types of light generation H01J 61/96, H05B 35/00)
H01L
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SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 (use of semiconductor devices for measuring G01;  resistors in general H01C;  magnets, inductors or transformers H01F;  capacitors in general H01G;  electrolytic devices H01G 9/00;  batteries or accumulators H01M;  waveguides, resonators or lines of the waveguide type H01P;  line connectors or current collectors H01R;  stimulated-emission devices H01S;  electromechanical resonators H03H;  loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers H04R;  electric light sources in general H05B;  printed circuits, hybrid circuits, casings or constructional details of electrical apparatus, manufacture of assemblages of electrical components H05K;  use of semiconductor devices in circuits having a particular application, see the subclass for the application) [2]
H01M
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PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY [2]
H01P
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WAVEGUIDES; RESONATORS, LINES OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B)
H01Q
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ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B 6/72)
H01R
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ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
H01S
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DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
H01T
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SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES (overvoltage protection circuits H02H)
H02
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GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H03
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ELECTRONIC CIRCUITRY
H04
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ELECTRIC COMMUNICATION TECHNIQUE
H05
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ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H10
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SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR [2023.01]
H99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]

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