DIFF Subgroup
C30B 31/06 by contacting with diffusion material in the gaseous state
Introduced: January 1980
Full Title
Diffusion or doping processes for single crystals or homogeneous polycrystalline material with defined structure; Apparatus therefor > by contacting with diffusion material in the gaseous state
IPC and CPC are identically structured here. All 6 subcodes exist in both systems.
IPC defines codes here since 1980.
Child Classifications
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- C30B 31/08 the diffusion materials being a compound of the elements to be diffused since 1980 IPC+CPC Available in IPC and CPC
- C30B 31/10 Reaction chambers; Selection of materials therefor since 1980 +2 CPC IPC+CPC Available in IPC and CPC
- C30B 31/16 Feed and outlet means for the gases; Modifying the flow of the gases since 1980 +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class C30,2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 1,516
- SUMCO CORPORATION JP 786
- SUMCO CORPORATION 703
- SUMITOMO ELECTRIC INDUSTRIES JP 604
- SHIN ETSU HANDOTAI COMPANY JP 556
- GLOBALWAFERS COMPANY TW 492
- APPLIED MATERIALS US 463
- SHIN ETSU HANDOTAI COMPANY 450
- SUMITOMO ELECTRIC INDUSTRIES 436
- SILTRONIC DE 429
Top Applicants (CPC)
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