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US 2017/0286744 A1Published application
Fingerprint Sensor Having Electrostatic Discharge Protection
AssigneeElan Microelectronics Corporation
InventorsTsung-Yin Chiang, Chun-Chi Wang, Chung-An Tang
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Abstract
A fingerprint sensor having electrostatic discharge (ESD) protection includes a first ESD protection electrode and a second ESD protection electrode. The first ESD protection electrode is connected to an ESD protection circuit for providing an ESD path, where the first ESD protection electrode and a fingerprint sensor electrode array are formed in a same layer of the fingerprint sensor. The second ESD electrode is connected to the first ESD electrode via multiple conductive via.
Claims9
A fingerprint sensor having electrostatic discharge (ESD) protection, comprising:
- a fingerprint sensor electrode array comprising multiple sensor electrodes, wherein a grid area is formed between the multiple sensor electrodes;
- a first ESD protection electrode, wherein the first ESD protection electrode is formed in the grid area;
- a protection layer, covering the fingerprint sensor electrode array and the first ESD protection electrode, wherein the fingerprint sensor electrode array and the first ESD protection electrode are formed in a same layer;
- a second ESD protection electrode formed below the grid area;
- a first dielectric layer, formed between the first ESD protection electrode and the second ESD protection electrode, covering the second ESD protection electrode, and comprising multiple first conductive via, wherein the multiple first conductive vias connect the first ESD protection electrode and the second ESD protection electrode;
- and
- an ESD protection circuit, connected to the first ESD protection electrode.
4 more elements
Dependencies are inferred from the claim text.