Semiconductor device
US6588672B1 · kind B1 · utility
25Cited by
3References
32Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2000 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Jan 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A semiconductor device is provided which effectively prevents forgery or alteration of IC cards or the like handling important information. Electrodes each having an unshaped irregular surface are provided, respectively, on the IC chip side and the substrate side. The electrodes are connected to each other, with the IC chip facing downward. Connection resistance is employed as a Key code by subjecting the capacitance between the electrodes to A/D conversion. This serves to prevent the duplication of IC cards or the like by employing the connection resistance having a random value as the key code of cryptograph.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.