CPC Main Group
C30B 13/00 Single-crystal growth by zone-melting; Refining by zone-melting (C30B17/00 takes precedence; by changing the cross-section of the treated solid C30B15/00; under a protective fluid C30B27/00; for the growth of homogeneous polycrystalline material with defined structure C30B28/00)
Filing statistics
CPC C30B 13/00 belongs to the parent subclass C30B, which recorded 47,784 patent applications worldwide between 2013 and 2023. Annual filings grew from 3,425 in 2013 to 5,586 in 2023 (+63%), peaking at 5,757 applications in 2022. The most active applicants in class C30 are CHINESE ACADEMY OF SCIENCES (1,052 applications), SUMCO CORPORATION (881 applications) and APPLIED MATERIALS (871 applications).
Source: EPO PATSTAT, worldwide filings
11 direct subcodes
Child Classifications
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- C30B 13/02 Zone-melting with a solvent, e.g. travelling solvent process
- C30B 13/04 Homogenisation by zone-levelling
- C30B 13/06 the molten zone not extending over the whole cross-section
- C30B 13/08 adding crystallising materials or reactants forming it in situ to the molten zone
- C30B 13/14 Crucibles or vessels
- C30B 13/16 Heating of the molten zone
- C30B 13/26 Stirring of the molten zone
- C30B 13/28 Controlling or regulating
- C30B 13/32 Mechanisms for moving either the charge or the heater
- C30B 13/34 characterised by the seed, e.g. by its crystallographic orientation
Top Applicants
Top 10 applicants by patent filingsfor class C30, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 1,052
- SUMCO CORPORATION JP 881
- APPLIED MATERIALS US 871
- SUMITOMO ELECTRIC INDUSTRIES JP 682
- SHIN ETSU HANDOTAI COMPANY JP 649
- SHIN-ETSU CHEMICAL COMPANY JP 506
- SUMCO CORPORATION 500
- SILTRONIC DE 491
- GLOBALWAFERS COMPANY TW 458
- NGK INSULATORS JP 379