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. 20, 2009
Filed:
Jan. 22, 2004
Tapani Ryhänen, Helsinki, FI;
Kari Hjelt, Espoo, FI;
Tapani Ryhänen, Helsinki, FI;
Kari Hjelt, Espoo, FI;
Nokia Corporation, Espoo, FI;
Abstract
A capacitive fingerprint sensor is fabricated on a plastic substrate () with an embedded integrated circuit chip (). The invention describes a way to create two or three dimensional forms for electrode structures () that can be used to optimize the performance of the sensor. When the three dimensional structure is designed to follow the shape of a finger, a very small pressure is required when sliding the finger along the sensor surface. This way the use of the sensor is ergonomic and the measurement is made very reliable. The inventive fabrication method describes the way, how to connect and embed an integrated circuit containing measurement electronics with a batch processed larger scale electrode configuration that is used for capturing the capacitive image of the fingerprint.