Authentec, Inc.

Roger Lee Schenk

Dale R Setlak

Michael Goldenberg

Patrick J Landy

Yang Rao

Albert M Straub

Phil Spletter

A finger sensing device may include an array of finger sensing pixels to receive a user's finger adjacent thereto. Each finger sensing pixel may include a finger sensing electrode. The finger sensing device may include a finger drive electrode configured to couple a drive signal through the user's finger to the array of finger sensing pixels. The finger sensing device may also include differential pixel measurement circuitry coupled to the array of finger sensing pixels and configured to generate a plurality of interpixel difference measurements for adjacent pairs of the finger sensing pixels.

Finger sensing device including differential measurement circuitry and related methods

A method of making finger sensor packages may include advancing a flexible circuit tape along a predetermined path of travel. The flexible circuit tape may include a flexible layer and conductive traces thereon defining individual flexible circuits. The method may include, as the flexible circuit tape is advanced along the path of travel, securing a respective finger sensing integrated circuit (IC) and surrounding sensor package frame to each flexible circuit, applying at least one fluid fill material adjacent each finger sensor IC while using the corresponding sensor package frame as a dam to thereby define finger sensor packages, and stamping out the finger sensor packages from the flexible circuit tape to form at least one flush common edge of each sensor package frame and individual flexible circuit.

Method of making a finger sensor package

Growing community of inventors

Indialantic, FL, United States of America

Roger Lee Schenk