Fingerprint sensing assemblies and methods of making
First Claim
Patent Images
1. A fingerprint sensing module, comprising:
- a sensor substrate having a circuit side;
an image sensor including conductive traces on the circuit side of the sensor substrate, the conductive traces comprising;
at least one image pickup plate, andat least one image drive plate in spaced relation to the at least one image pickup plate to define at least one sensor gap between the at least one image drive plate and the at least one image pickup plate, wherein ridge peaks and ridge valleys of a fingerprint over the at least one sensor gap produce a change in capacitance between the at least one image drive plate and the at least one image pickup plate;
a sensor circuit including at least one integrated circuit mounted on the circuit side of the sensor substrate and electrically connected to the image sensor; and
a rigid substrate, wherein the sensor substrate is affixed to a first surface of the rigid substrate, wherein the sensor substrate has a larger area than the rigid substrate.
4 Assignments
0 Petitions
Accused Products
Abstract
A fingerprint sensing module includes a sensor substrate having a sensing side and a circuit side, an image sensor including conductive traces on the circuit side of the sensor substrate, and a sensor circuit including at least one integrated circuit mounted on the circuit side of the sensor substrate and electrically connected to the image sensor. The sensor substrate may be a flexible substrate. The module may include a velocity sensor on the sensor substrate or on a separate substrate. The module may further include a rigid substrate, and the sensor substrate may be affixed to the rigid substrate.
16 Citations
15 Claims
-
1. A fingerprint sensing module, comprising:
-
a sensor substrate having a circuit side; an image sensor including conductive traces on the circuit side of the sensor substrate, the conductive traces comprising; at least one image pickup plate, and at least one image drive plate in spaced relation to the at least one image pickup plate to define at least one sensor gap between the at least one image drive plate and the at least one image pickup plate, wherein ridge peaks and ridge valleys of a fingerprint over the at least one sensor gap produce a change in capacitance between the at least one image drive plate and the at least one image pickup plate; a sensor circuit including at least one integrated circuit mounted on the circuit side of the sensor substrate and electrically connected to the image sensor; and a rigid substrate, wherein the sensor substrate is affixed to a first surface of the rigid substrate, wherein the sensor substrate has a larger area than the rigid substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A fingerprint sensing module, comprising:
-
a flexible substrate; an image sensor including conductive traces on the flexible substrate, the conductive traces comprising; at least one image pickup plate, and at least one image drive plate in spaced relation to the at least one image pickup plate to define at least one sensor gap between the at least one image drive plate and the at least one image pickup plate, wherein ridge peaks and ridge valleys of a fingerprint over the at least one sensor gap produce a change in capacitance between the at least one image drive plate and the at least one image pickup plate; a base, wherein the flexible substrate is wrapped around the base; and a sensor circuit including at least one integrated circuit mounted on the flexible substrate and electrically connected to the image sensor. - View Dependent Claims (14)
-
-
15. A method for making a fingerprint sensing module, the method comprising:
-
providing a sensor substrate having a circuit side, wherein the sensor substrate comprises a flexible film; forming an image sensor including conductive traces on the circuit side of the sensor substrate, the conductive traces comprising; at least one image pickup plate, and at least one image drive plate in spaced relation to the at least one image pickup plate to define at least one sensor gap between the at least one image drive plate and the at least one image pickup plate, wherein ridge peaks and ridge valleys of the fingerprint over the at least one sensor gap produce a change in capacitance between the at least one image drive plate and the at least one image pickup plate; and mounting a sensor circuit including at least one integrated circuit on the circuit side of the sensor substrate, wherein the at least one integrated circuit is affixed to the sensor substrate by a chip-on-film process.
-
Specification