Hitachi Ulsi Systems Co., Ltd.
596Patents
109Active
596Granted
49Portfolio score
Filing activity: Apr 27, 1998 → Apr 20, 2013 · 96 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6542411B2 | Nonvolatile memory and semiconductor device with controlled voltage booster circuit | Physics | 231 | Expired |
| US6291273A | Plastic molded type semiconductor device and fabrication process thereof | Electricity | 193 | Expired |
| US6168996A | Method of fabricating semiconductor device | Electricity | 164 | Expired |
| US6555918B2 | Stacked semiconductor device including improved lead frame arrangement | Emerging Cross-Sectional Technologies | 157 | Expired |
| US6479322B2 | Semiconductor device with two stacked chips in one resin body and method of producing | Electricity | 148 | Expired |
| US6669487B1 | IC card | Electricity | 148 | Expired |
| US6426560B1 | Semiconductor device and memory module | Electricity | 143 | Expired |
| US6963136B2 | Semiconductor integrated circuit device | Electricity | 121 | Expired |
| US6734687B1 | Apparatus for detecting defect in device and method of detecting defect | Physics | 113 | Expired |
| US6709880B2 | Semiconductor device and a manufacturing method of the same | Electricity | 111 | Expired |
| US6809399B2 | Semiconductor integrated circuit device and process for manufacturing the same | Emerging Cross-Sectional Technologies | 106 | Expired |
| US6735726B2 | Method of deciding error rate and semiconductor integrated circuit device | Physics | 105 | Expired |
| US6091660A | Semiconductor integrated circuit device | Physics | 97 | Expired |
| US6928512B2 | Semiconductor device with non-volatile memory and random access memory | Electricity | 94 | Expired |
| US6388653B1 | Liquid crystal display device with influences of offset voltages reduced | Physics | 78 | Expired |
| US6372554B1 | Semiconductor integrated circuit device and method for production of the same | Electricity | 77 | Expired |
| US6314044A | Semiconductor integrated circuit device | Physics | 72 | Expired |
| US6503794B1 | Semiconductor integrated circuit device and method for manufacturing the same | Emerging Cross-Sectional Technologies | 66 | Expired |
| US6252299A | Stacked semiconductor device including improved lead frame arrangement | Emerging Cross-Sectional Technologies | 65 | Expired |
| US6519184B2 | Non-volatile memory device with plurality of threshold voltage distributions | Physics | 59 | Expired |
| US6972918B2 | Magnetic disk memory system | Physics | 57 | Expired |
| US6731537B2 | Non-volatile memory device and data storing method | Physics | 57 | Expired |
| US6795362B2 | Power controlling method for semiconductor storage device and semiconductor storage device employing same | Physics | 57 | Expired |
| US6609236B2 | Semiconductor IC device having a memory and a logic circuit implemented with a single chip | Electricity | 57 | Expired |
| US6879041B2 | Semiconductor device with joint structure having lead-free solder layer over nickel layer | Electricity | 56 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.