IPC Subgroup
H01J 37/3 Electron-beam or ion-beam tubes for localised treatment of objects
Introduced: September 1968
Last revised: January 2006
Full Title
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 > Electron-beam or ion-beam tubes for localised treatment of objects
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
7 direct subcodes
Child Classifications
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- H01J 37/301 Arrangements enabling beams to pass between regions of different pressure
- H01J 37/302 Controlling tubes by external information, e.g. program control
- H01J 37/304 Controlling tubes by information coming from the objects, e.g. correction signals
- H01J 37/305 for casting, melting, evaporating, or etching
- H01J 37/31 for cutting or drilling
- H01J 37/315 for welding
- H01J 37/317 for changing properties of the objects or for applying thin layers thereon, e.g. ion implantation
Top Applicants
Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
- SAMSUNG ELECTRONICS COMPANY KR 42,206
- LG CHEM KR 21,383
- APPLIED MATERIALS US 20,441
- LG ENERGY SOLUTION KR 20,279
- SAMSUNG DISPLAY KR 19,725
- CHINESE ACADEMY OF SCIENCES 19,400
- TOYOTA MOTOR CORPORATION 18,819
- SGCC(STATE GRID CORPORATION OF CHINA) 18,082
- TOKYO ELECTRON JP 17,634