Method for identifying a semiconductor die using an IC with programmable links
US5301143A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1992 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Dec 31, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for identifying a semiconductor die includes a programmable integrated circuit formed on the semiconductor die. The programmable circuit includes FET transistors connected to output nodes and to programmable links such as fuses, anti-fuses or laser programmable links which are connected to ground. A gate element of each transistor is connected to an address line which controls current flow through the transistors to the output nodes. During manufacture, the programmable links can be selectively activated to create an identification code which can be read at the output nodes of the integrated circuit upon input of a predetermined address code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.