H01J 37/30 Electron-beam or ion-beam tubes for localised treatment of objects
Introduced: September 1968
Full Title
Full titles differ between systems:
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
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 (H01J33/00, H01J40/00, H01J41/00, H01J47/00, H01J49/00 take precedence) > Electron-beam or ion-beam tubes for localised treatment of objects
Of 8 combined children, 7 exist in both systems.
1 codes are CPC-only extensions.
3 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1974.
Child Classifications
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- H01J 37/301 Arrangements enabling beams to pass between regions of different pressure since 1980 IPC+CPC Available in IPC and CPC
- H01J 37/302 Controlling tubes by external information, e.g. program control (H01J37/304 takes precedence) since 1980 +1 CPC IPC+CPC Available in IPC and CPC
- H01J 37/304 Controlling tubes by information coming from the objects , e.g. correction signals since 1980 +1 CPC IPC+CPC Available in IPC and CPC
- H01J 37/305 for casting, melting, evaporating, or etching since 1974 +1 CPC IPC+CPC Available in IPC and CPC
- H01J 37/317 for changing properties of the objects or for applying thin layers thereon, e.g. for ion implantation (H01J37/36 takes precedence) since 1980 +3 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
Class H01,2013–2023, worldwide · Source: EPO PATSTAT
- SAMSUNG ELECTRONICS COMPANY KR 37,897
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 36,116
- APPLIED MATERIALS US 21,640
- LG ENERGY SOLUTION KR 20,770
- LG CHEM KR 19,835
- TOKYO ELECTRON JP 18,519
- ROBERT BOSCH DE 14,595
- INTEL CORPORATION US 13,580
- MURATA MANUFACTURING COMPANY JP 12,151
- SAMSUNG SDI COMPANY KR 12,080