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IPC Subgroup
C30B 30/04

using magnetic fields

Introduced: January 1990

Last revised: January 2006

Full Title

Production of single crystals or homogeneous polycrystalline material with defined structure characterised by the action of electric or magnetic fields, wave energy or other specific physical conditions > using magnetic fields

Classification Context

Section:
CHEMISTRY; METALLURGY
Class:
CRYSTAL GROWTH
Subclass:
SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR

Filing statistics

IPC C30B 30/04 belongs to the parent subclass C30B, which recorded 59,070 patent applications worldwide between 2013 and 2023. Annual filings grew from 4,540 in 2013 to 7,633 in 2023 (+68%). The most active applicants in class C30 are CHINESE ACADEMY OF SCIENCES (1,516 applications), SUMCO CORPORATION (786 applications) and SUMCO CORPORATION (703 applications).

Source: EPO PATSTAT, worldwide filings

Top Applicants

Top 10 applicants by patent filingsfor 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