CPC Subgroup Additional Only
B81C 2201/0171 Doping materials
Full Title
Manufacture or treatment of microstructural devices or systems > in or on a substrate > Controlling physical properties of the material > Doping materials
1 direct subcode
Child Classifications
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- B81C 2201/0173 Thermo-migration of impurities from a solid, e.g. from a doped deposited layer
Top Applicants
Top 10 applicants by patent filingsfor class B81, 2013–2023, worldwide · Source: EPO PATSTAT
- ROBERT BOSCH DE 1,976
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 788
- INFINEON TECHNOLOGIES DE 759
- CEA (COMMISSARIAT A L'ENERGIE ATOMIQUE) FR 555
- STMICROELECTRONICS IT 526
- INVENSENSE US 430
- MURATA MANUFACTURING COMPANY JP 418
- SEIKO EPSON CORPORATION 338
- CHINESE ACADEMY OF SCIENCES 338
- FRAUNHOFER DE 297