IPC Subgroup
H01J 27/02 Ion sources; Ion guns
Introduced: January 1980
Last revised: January 2006
Full Title
Ion beam tubes > Ion sources; Ion guns
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
Filing statistics
IPC H01J 27/02 belongs to the parent subclass H01J, which recorded 110,789 patent applications worldwide between 2013 and 2023. Annual filings grew from 9,068 in 2013 to 10,705 in 2023 (+18%), peaking at 11,872 applications in 2021. The most active applicants in class H01 are TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY (43,574 applications), SAMSUNG ELECTRONICS COMPANY (42,206 applications) and LG CHEM (21,383 applications).
Source: EPO PATSTAT, worldwide filings
6 direct subcodes
Child Classifications
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- H01J 27/04 using reflex discharge, e.g. Penning ion sources
- H01J 27/08 using arc discharge
- H01J 27/16 using high-frequency excitation, e.g. microwave excitation
- H01J 27/2 using particle bombardment, e.g. ionisers
- H01J 27/24 using photo-ionisation, e.g. using laser beam
- H01J 27/26 using surface ionisation, e.g. field effect ion sources, thermionic ion sources
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