Invention Grant
- Patent Title: Fingerprint sensing device and method for manufacturing a fingerprint sensing device
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Application No.: US15464680Application Date: 2017-03-21
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Publication No.: US09977945B2Publication Date: 2018-05-22
- Inventor: Karl Lundahl , Robert Hägglund , Emil Hjalmarson , Rolf Sundblad , Christer Jansson
- Applicant: Fingerprint Cards AB
- Applicant Address: SE Göteborg
- Assignee: Fingerprint Cards AB
- Current Assignee: Fingerprint Cards AB
- Current Assignee Address: SE Göteborg
- Agency: RMCK Law Group PLC
- Priority: SE1650769 20160601
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G06F3/041

Abstract:
There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, said capacitive fingerprint sensing device comprising: a protective top layer to be touched by said finger; a first metal layer comprising a two-dimensional array of sensing structures arranged underneath said top layer; a second metal layer, arranged underneath said first metal layer, comprising a plurality of conductive structures a dielectric layer arranged between the first and second metal layers to electrically insulate the first metal layer from the second metal layer, the dielectric layer comprising a low-k material; and readout circuitry arranged underneath said second metal layer and coupled to each of the electrically conductive sensing structures by means of via connections to receive a sensing signal indicative of a distance between said finger and said sensing structure. There is also provided a method for manufacturing such a device.
Public/Granted literature
- US20170351895A1 FINGERPRINT SENSING DEVICE AND METHOD FOR MANUFACTURING A FINGERPRINT SENSING DEVICE Public/Granted day:2017-12-07
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