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PCE
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DIFF Subgroup
H01J 37/06

Electron sources; Electron guns

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

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 > Details > Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement > Electron sources; Electron guns

CPC:

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) > Details > Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement or ion-optical arrangement > Electron sources; Electron guns

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 1980.

Child Classifications

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  • H01J 37/061 CPC only CPC only
  • H01J 37/063 Geometrical arrangement of electrodes for beam-forming since 1980 IPC+CPC Available in IPC and CPC
  • H01J 37/065 Construction of guns or parts thereof (H01J37/067 - H01J37/077 take precedence) since 1980 IPC+CPC Available in IPC and CPC
  • H01J 37/067 Replacing parts of guns; Mutual adjustment of electrodes (H01J37/073 - H01J37/077 take precedence; vacuum locks H01J37/18) since 1980 IPC+CPC Available in IPC and CPC
  • H01J 37/07 Eliminating deleterious effects due to thermal effects or electric or magnetic fields (H01J37/073 - H01J37/077 take precedence) since 1980 IPC+CPC Available in IPC and CPC
  • H01J 37/073 Electron guns using field emission, photo emission, or secondary emission electron sources since 1980 IPC+CPC Available in IPC and CPC
  • H01J 37/075 Electron guns using thermionic emission from cathodes heated by particle bombardment or by irradiation, e.g. by laser since 1980 IPC+CPC Available in IPC and CPC
  • H01J 37/077 Electron guns using discharge in gases or vapours as electron sources since 1980 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

  1. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
  2. SAMSUNG ELECTRONICS COMPANY KR 42,206
  3. LG CHEM KR 21,383
  4. APPLIED MATERIALS US 20,441
  5. LG ENERGY SOLUTION KR 20,279
  6. SAMSUNG DISPLAY KR 19,725
  7. CHINESE ACADEMY OF SCIENCES 19,400
  8. TOYOTA MOTOR CORPORATION 18,819
  9. SGCC(STATE GRID CORPORATION OF CHINA) 18,082
  10. TOKYO ELECTRON JP 17,634

Top Applicants (CPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 37,897
  2. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 36,116
  3. APPLIED MATERIALS US 21,640
  4. LG ENERGY SOLUTION KR 20,770
  5. LG CHEM KR 19,835
  6. TOKYO ELECTRON JP 18,519
  7. ROBERT BOSCH DE 14,595
  8. INTEL CORPORATION US 13,580
  9. MURATA MANUFACTURING COMPANY JP 12,151
  10. SAMSUNG SDI COMPANY KR 12,080