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PCE
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DIFF Subgroup
C30B 15/22

Stabilisation or shape controlling of the molten zone near the pulled crystal; Controlling the section of the crystal

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Single-crystal growth by pulling from a melt, e.g. Czochralski method > Controlling or regulating > Stabilisation or shape controlling of the molten zone near the pulled crystal; Controlling the section of the crystal

CPC:

Single-crystal growth by pulling from a melt, e.g. Czochralski method (under a protective fluid C30B27/00) > Controlling or regulating (controlling or regulating in general G05) > Stabilisation or shape controlling of the molten zone near the pulled crystal; Controlling the section of the crystal

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1980.

Child Classifications

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  • C30B 15/24 using mechanical means, e.g. shaping guides (shaping dies for edge-defined film-fed crystal growth C30B15/34) since 1980 IPC+CPC Available in IPC and CPC
  • C30B 15/26 using television detectors; using photo or X-ray detectors since 1980 IPC+CPC Available in IPC and CPC
  • C30B 15/28 using weight changes of the crystal or the melt, e.g. flotation methods since 1980 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class C30,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 1,516
  2. SUMCO CORPORATION JP 786
  3. SUMCO CORPORATION 703
  4. SUMITOMO ELECTRIC INDUSTRIES JP 604
  5. SHIN ETSU HANDOTAI COMPANY JP 556
  6. GLOBALWAFERS COMPANY TW 492
  7. APPLIED MATERIALS US 463
  8. SHIN ETSU HANDOTAI COMPANY 450
  9. SUMITOMO ELECTRIC INDUSTRIES 436
  10. SILTRONIC DE 429

Top Applicants (CPC)

Class C30,2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINESE ACADEMY OF SCIENCES 1,052
  2. SUMCO CORPORATION JP 881
  3. APPLIED MATERIALS US 871
  4. SUMITOMO ELECTRIC INDUSTRIES JP 682
  5. SHIN ETSU HANDOTAI COMPANY JP 649
  6. SHIN-ETSU CHEMICAL COMPANY JP 506
  7. SUMCO CORPORATION 500
  8. SILTRONIC DE 491
  9. GLOBALWAFERS COMPANY TW 458
  10. NGK INSULATORS JP 379