Integrated circuit device
US11658133B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2017 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | Jan 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L23/576
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
An integrated circuit device is disclosed, the device comprising a protective layer and a protected circuit on a substrate, the protective layer being configured to protect the protected circuit by absorbing laser radiation targeted at the protected circuit through the substrate. The device may be configured such that removal of the protective layer causes physical damage that disables the protected circuit. The device may comprise intermediate circuitry protruding into the substrate between the protective layer and the protected circuit, wherein the physical damage that disables the protected circuit is physical damage to the intermediate circuitry. The device may comprise detection circuitry configured to detect a change in an electrical property of the device indicative of removal of the protective layer, and, in response to detecting the change in the electrical property, cause the protected circuit to be disabled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.