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PCE
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DIFF Subgroup
G11B 7/135

Means for guiding the beam from the source to the record carrier or from the record carrier to the detector

Introduced: January 1985

Full Title

Full titles differ between systems:

IPC:

Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor > Heads, e.g. forming of the optical beam spot or modulation of the optical beam > Means for guiding the beam from the source to the record carrier or from the record carrier to the detector

CPC:

Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation , reproducing using an optical beam at lower power ; Record carriers therefor (G11B11/00, G11B13/00 take precedence) > Heads, e.g. forming of the optical beam spot or modulation of the optical beam (disposition or mounting of head elements within housing or with provision for moving of light source, optical beam or detector, irrelevant to the transducing method G11B7/08 ) > Means for guiding the beam from the source to the record carrier or from the record carrier to the detector

IPC and CPC are identically structured here. All 13 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2012.

Child Classifications

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  • G11B 7/1353 Diffractive elements, e.g. holograms or gratings since 2012 IPC+CPC Available in IPC and CPC
  • G11B 7/1356 Double or multiple prisms, i.e. having two or more prisms in cooperation since 2012 IPC+CPC Available in IPC and CPC
  • G11B 7/1359 Single prisms since 2012 IPC+CPC Available in IPC and CPC
  • G11B 7/1362 Mirrors since 2012 IPC+CPC Available in IPC and CPC
  • G11B 7/1381 Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops (G11B7/1353 - G11B7/1369 take precedence) since 2012 IPC+CPC Available in IPC and CPC
  • G11B 7/1384 Fibre optics since 2012 IPC+CPC Available in IPC and CPC
  • G11B 7/1387 using the near-field effect since 2012 IPC+CPC Available in IPC and CPC
  • G11B 7/139 Numerical aperture control means since 2012 IPC+CPC Available in IPC and CPC
  • G11B 7/1395 Beam splitters or combiners (G11B7/1353, G11B7/1356 take precedence ) since 2012 IPC+CPC Available in IPC and CPC
  • G11B 7/1398 Means for shaping the cross-section of the beam, e.g. into circular or elliptical cross-section since 2012 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

Class G11,2013–2023, worldwide · Source: EPO PATSTAT

  1. MICRON TECHNOLOGY US 12,397
  2. SAMSUNG ELECTRONICS COMPANY KR 12,238
  3. SK HYNIX KR 11,371
  4. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 4,601
  5. INTEL CORPORATION US 3,874
  6. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 3,866
  7. SANDISK TECHNOLOGIES US 3,151
  8. SK HYNIX 3,143
  9. SAMSUNG ELECTRONICS COMPANY 3,073
  10. WESTERN DIGITAL TECHNOLOGIES US 2,961