Inventor · Tokyo, JP

Daisuke Okada

69Patents
7h-index
88Co-inventors
75Inventor score

Filing activity: Oct 15, 1984 → Jun 23, 2021

Most-cited inventions

PatentTitleAreaCited byStatus
US4746963A Isolation regions formed by locos followed with groove etch and refill Emerging Cross-Sectional Technologies 26 Expired
US7015090B2 Method of manufacturing a semiconductor device having trenches for isolation and capacitor formation trenches Electricity 19 Expired
US4907063A Semiconductor body, and device formed therefrom, having grooves with silicon nitride on the groove surfaces Emerging Cross-Sectional Technologies 18 Expired
US7245531B2 Semiconductor device Electricity 18 Expired
US7259422B1 Nonvolatile semiconductor memory device and its fabrication method Electricity 13 Active
US5200348A Method of manufacturing semiconductor device with constant width deep groove isolation Emerging Cross-Sectional Technologies 9 Expired
US7709874B2 Semiconductor device having a split gate structure with a recessed top face electrode Electricity 8 Active
US7085157B2 Nonvolatile memory device and semiconductor device Physics 7 Expired
US4700464A Method of forming trench isolation in an integrated circuit Emerging Cross-Sectional Technologies 6 Expired
US9257446B2 Semiconductor device and method of manufacturing same Electricity 6 Active
US4853343A Method for fabricating a semiconductor integrated circuit device having thick oxide films and groove etch and refill Emerging Cross-Sectional Technologies 6 Expired
US8869946B2 Emergency stop device for elevators Performing Operations; Transporting 6 Active
US7001808B2 Semiconductor integrated circuit device having a dummy conductive film and method of manufacturing the same Electricity 6 Expired
US8390053B2 Nonvolatile semiconductor device including a field effect transistor having a charge storage layer of predetermined length Electricity 5 Active
US7212444B2 Semiconductor nonvolatile memory device Physics 5 Expired
US7095074B2 Semiconductor device with reduced memory leakage current Electricity 5 Expired
US7529126B2 Nonvolatile memory device and semiconductor device Physics 5 Active
US8363248B2 Image forming apparatus Physics 3 Active
US7502257B2 Semiconductor device Electricity 3 Active
US9245900B2 Semiconductor device and manufacturing method of semiconductor device Electricity 3 Active
US9825049B2 Semiconductor device and manufacturing method of semiconductor device Electricity 2 Active
US9508554B2 Method of manufacturing semiconductor device Electricity 2 Active
US8582161B2 Image forming apparatus, and computer program product for image forming provided with managing log of a time designated print job Physics 2 Active
US10985515B2 Surface mount connector and surface mount connector set Electricity 2 Active
US9515082B2 Semiconductor device and method of manufacturing the same Electricity 2 Active

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