Inventor · Yokohama, JP

Hiroomi Nakajima

22Patents
7h-index
21Co-inventors
69Inventor score

Filing activity: Jan 30, 1989 → Feb 27, 2018

Most-cited inventions

PatentTitleAreaCited byStatus
US4931409A Method of manufacturing semiconductor device having trench isolation Electricity 50 Expired
US5204276A Method of manufacturing semiconductor device Emerging Cross-Sectional Technologies 28 Expired
US7629651B2 Semiconductor memory device and manufacturing method therefor Electricity 23 Active
US5510647A Semiconductor device and method of manufacturing the same Electricity 11 Expired
US7301195B2 Semiconductor memory device for storing data as state of majority carriers accumulated in channel body and method of manufacturing the same Physics 10 Expired
US9076502B2 Non-volatile memory device Electricity 9 Active
US6331727A Semiconductor device and method of fabricating the same Electricity 8 Expired
US5096842A Method of fabricating bipolar transistor using self-aligned polysilicon technology Emerging Cross-Sectional Technologies 6 Expired
US7902584B2 Semiconductor memory device and manufacturing method thereof Electricity 5 Active
US9035371B2 Nonvolatile semiconductor memory device Electricity 5 Active
US6541348B1 Semiconductor device and manufacturing method thereof Electricity 4 Expired
US8373288B2 Alignment mark, method of manufacturing semiconductor device, and mask set Electricity 4 Active
US7696558B2 Semiconductor memory device for storing data as state of majority carriers accumulated in channel body and method of manufacturing the same Physics 3 Active
US5637909A Semiconductor device and method of manufacturing the same Electricity 3 Expired
US5244822A Method of fabricating bipolar transistor using self-aligned polysilicon technology Emerging Cross-Sectional Technologies 2 Expired
US9646988B2 Semiconductor memory device and method for manufacturing same Electricity 2 Active
US8227784B2 Semiconductor memory device including resistance-change memory Physics 2 Active
US10784217B2 Memory device Electricity 0 Active
US8288751B2 Semiconductor memory device and manufacturing method of the same Electricity 0 Active
US8530879B2 Semiconductor memory device Electricity 0 Active
US8680505B2 Semiconductor memory device Electricity 0 Active
US7714388B2 Semiconductor memory device and manufacturing method thereof Electricity 0 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.