Takamasa Usui
75Patents
14h-index
78Co-inventors
87Inventor score
Filing activity: Nov 6, 1996 → Oct 13, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6071810A | Method of filling contact holes and wiring grooves of a semiconductor device | Electricity | 71 | Expired |
| US6559548B1 | Wiring structure of semiconductor device | Electricity | 60 | Expired |
| US7304384B2 | Semiconductor device with a barrier film which contains manganese | Electricity | 59 | Expired |
| US10297578B2 | Memory device | Electricity | 34 | Active |
| US6673704B2 | Semiconductor device and method of manufacturing the same | Electricity | 25 | Expired |
| US7303271B2 | Ink jet printer | Performing Operations; Transporting | 22 | Expired |
| US7410248B2 | Air bubble removal in an ink jet printer | Performing Operations; Transporting | 21 | Active |
| US6407453B1 | Semiconductor device and method of manufacturing the same | Electricity | 20 | Expired |
| US7049701B2 | Semiconductor device using insulating film of low dielectric constant as interlayer insulating film | Electricity | 17 | Expired |
| US7091733B2 | Reliability evaluation test apparatus, reliability evaluation test system, contactor, and reliability evaluation test method | Physics | 17 | Expired |
| US6864583B2 | Wiring structure of semiconductor device | Electricity | 16 | Expired |
| US5943601A | Process for fabricating a metallization structure | Electricity | 16 | Expired |
| US7217979B2 | Semiconductor apparatus including a radiator for diffusing the heat generated therein | Electricity | 15 | Expired |
| US8044519B2 | Semiconductor device and method of fabricating the same | Electricity | 14 | Active |
| US6609792B2 | Data transmission element for use in an ink-jet printer | Performing Operations; Transporting | 13 | Expired |
| US6091080A | Evaluation method for wirings of semiconductor device | Electricity | 12 | Expired |
| US7485915B2 | Semiconductor device and method having capacitor and capacitor insulating film that includes preset metal element | Emerging Cross-Sectional Technologies | 12 | Expired |
| US7810899B2 | Inkjet printer and printing head capping method | Performing Operations; Transporting | 11 | Active |
| US7661805B2 | Ink-jet printer | Performing Operations; Transporting | 10 | Active |
| US7495288B2 | Semiconductor apparatus including a radiator for diffusing the heat generated therein | Electricity | 10 | Active |
| US7399070B2 | Ink jet printer | Performing Operations; Transporting | 9 | Expired |
| US7943517B2 | Semiconductor device with a barrier film | Electricity | 9 | Active |
| US7888253B2 | Method of fabricating semiconductor device | Electricity | 8 | Active |
| US6110647A | Method of manufacturing semiconductor device | Physics | 8 | Expired |
| US10741527B2 | Memory device | Electricity | 8 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.