The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 2007
Filed:
Aug. 12, 2003
Bruce C. S. Chou, Hsin Chu, TW;
Bruce C. S. Chou, Hsin Chu, TW;
LighTuning Tech, Inc., Hsinchu, TW;
Abstract
A capacitive micro pressure sensing member and a fingerprint sensor using the same. The sensing member includes a substrate, a first suspended structure, a first protrusion structure, and a second suspended structure. The first suspended structure is located above the substrate and includes a suspended thin plate and at least one compliant suspension arm connected to the suspended thin plate, which is movable so that a distance from the suspended thin plate to the substrate is changed. The first protrusion structure is arranged at a center portion of a top surface of the suspended thin plate. The second suspended structure is arranged on a top surface of the first protrusion structure with a center portion of the second suspended structure contacting the first protrusion structure. The second suspended structure covers the first suspended structure to form a sealed chamber together with the substrate.