Finger sensor including capacitive lens and associated methods
US8803258B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Mar 29, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/48227
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A finger sensing device may include a mounting substrate, an integrated circuit (IC) die carried by the mounting substrate and having an array of electric field-based finger sensing elements, and first electrical connections coupling the mounting substrate and the IC die. In addition, the finger sensing device may include a protective plate attached over the array of electric field-based finger sensing elements and having a dielectric constant greater than 5 in all directions and a thickness greater than 40 microns to define a capacitive lens for the array of electric field-based finger sensing elements. The finger sensing device may also include an encapsulating material adjacent the mounting substrate and the IC die and around at least the first electrical connections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.