Invention Grant
- Patent Title: Fingerprint sensing device with interposer structure
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Application No.: US15168591Application Date: 2016-05-31
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Publication No.: US09672407B2Publication Date: 2017-06-06
- Inventor: Karl Lundahl
- Applicant: Fingerprint Cards AB
- Applicant Address: SE Göteborg
- Assignee: FINGERPRINT CARDS AB
- Current Assignee: FINGERPRINT CARDS AB
- Current Assignee Address: SE Göteborg
- Agency: Remarck Law Group PLC
- Main IPC: G06K9/00
- IPC: G06K9/00 ; G03F7/16

Abstract:
The invention relates to a fingerprint sensing device comprising: a sensing chip comprising an array of sensing elements being configured to be connected to readout circuitry for detecting a capacitive coupling between each of the sensing elements and a finger placed on a sensing surface of the sensing device. A surface of the sensing elements define a sensing plane. The sensing device further comprises a plurality of interposer structures arranged on the sensing chip extending above sensing plane, wherein the plurality of interposer structures have the same height above the sensing plane. A protective plate is attached to the sensing chip by means of an adhesive, and the protective plate rests on the interposer structures such that a distance between the protective plate and the sensing plane is defined by the height of the interposer structures.
Public/Granted literature
- US20160358008A1 FINGERPRINT SENSING DEVICE WITH INTERPOSER STRUCTURE Public/Granted day:2016-12-08
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