Method for manufacturing fingerprint recognition sensor, fingerprint recognition sensor and electronic device
A fingerprint recognition and electronic device technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of increased cost, complex fingerprint recognition components, etc., to achieve improved reliability, good fingerprint detection effect, and low cost. Effect
Inactive Publication Date: 2018-07-31
NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH +3
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This leads to the complexity of the entire fingerprint recognition component and increases the cost
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[0054] According to an example embodiment, the sensing electrode 101 and the driving electrode 103 may include a conductive grid 105, such as Figure 5 shown. At this time, the groove 115 has a structure corresponding to the conductive grid 105 . The use of conductive grids reduces the cost, but still achieves good results in fingerprint recognition.
[0055] As mentioned earlier, fingerprint detection is related to the change of the capacitance between the sense electrode and the drive electrode. More specifically, the rate of change of the capacitance between the sensing electrode and the driving electrode ΔC%=ΔC / C, where C is the capacitance between the sensing electrode and a single driving electrode, and ΔC is the fingerprint ridge between the sensing electrode and the single driving electrode. The change in capacitance when detecting the gap between electrodes, ΔC% is the capacitance change rate.
[0056] The inventors found that by adjusting the capacitance change ra...
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The invention relates to a method for manufacturing a fingerprint recognition sensor, the fingerprint recognition sensor and an electronic device. The method for manufacturing the fingerprint recognition sensor comprises the following steps that a substrate is prepared; an impressing layer is formed on the substrate; a plurality of grooves are formed in the impressing layer; the grooves are filled with conducting materials, so that a fingerprint detection component is formed. According to the grooves formed in the impressing layer, the depths of the grooves are adjusted, so that when a fingerprint ridge is located in a detection gap between a first induction electrode and one of a plurality of first driving electrodes, the rate of change in capacitance between the first induction electrode and one of the first driving electrodes ranges from 30% to 80%, and when the fingerprint ridge is located in a detection gap between a second induction electrode and one of a plurality of second driving electrodes, the rate of change in capacitance between the second induction electrode and one of the second driving electrodes ranges from 30% to 80%.
Description
technical field [0001] The present disclosure relates to a fingerprint recognition sensor, and in particular, to a method for manufacturing a fingerprint recognition sensor, a fingerprint recognition sensor and an electronic device. Background technique [0002] Certain biometric features of the human body (such as fingerprints / palmprints) are unique to the human body, and their complexity can provide a sufficient number of features for identification. [0003] Fingerprint / palmprint and other identification technologies are currently the most mature and cheap biometric identification technologies. Fingerprint identification technology has been widely used. Not only can we see fingerprint recognition technology in access control and attendance systems, but there are more fingerprint recognition applications in the market: such as laptops, mobile phones, cars, and bank payments can all apply fingerprint recognition technology. Especially with the continuous development of sm...
Claims
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IPC IPC(8): G06K9/00
Inventor 谭强丁国栋蒋亚兵
Owner NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH