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IPC Subgroup
G11C 11/407

for memory cells of the field-effect type

Introduced: January 1990

Last revised: January 2006

Full Title

Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor > using electric elements > using semiconductor devices > using transistors > forming cells needing refreshing or charge regeneration, i.e. dynamic cells > Auxiliary circuits, e.g. for addressing, decoding, driving, writing, sensing or timing > for memory cells of the field-effect type

Classification Context

Section:
PHYSICS
Class:
INFORMATION STORAGE
Subclass:
STATIC STORES

6 direct subcodes

Child Classifications

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  • G11C 11/4072 Circuits for initialization, powering up or down, clearing memory or presetting
  • G11C 11/4074 Power supply or voltage generation circuits, e.g. bias voltage generators, substrate voltage generators, back-up power, power control circuits
  • G11C 11/4076 Timing circuits
  • G11C 11/4078 Safety or protection circuits, e.g. for preventing inadvertent or unauthorised reading or writing; Status cells; Test cells
  • G11C 11/408 Address circuits

Top Applicants

Top 10 applicants by patent filingsfor class G11, 2013–2023, worldwide · Source: EPO PATSTAT

  1. MICRON TECHNOLOGY US 10,574
  2. SK HYNIX KR 9,138
  3. SAMSUNG ELECTRONICS COMPANY KR 9,004
  4. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 3,739
  5. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 3,443
  6. INTEL CORPORATION US 2,952
  7. SANDISK TECHNOLOGIES US 2,905
  8. WESTERN DIGITAL TECHNOLOGIES US 2,630
  9. TOSHIBA CORPORATION JP 2,593
  10. SEAGATE TECHNOLOGY US 2,472