Pyroelectric sensor with improved abrasion-resistance coating
US11073426B2 · kind B2 · utility
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Key dates
| Filing date | Oct 18, 2019 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Jan 24, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1329
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermal pattern sensor including a plurality of pixels arranged on a substrate. Each pixel has a pyroelectric capacitance formed by at least one pyroelectric material portion arranged between a lower electrode and an upper electrode. The sensor has an abrasion-resistance coating, located on the side opposite the substrate and including pillars embedded in an abrasion-resistance layer, the pillars having a thermal conductivity strictly higher than that of the abrasion-resistance layer. A high thickness of the anti-abrasion protection coating can be achieved with a high rate of thermal transfer through the latter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.