TWM521777U - Fingerprint recognition device - Google Patents

Description

Fingerprint identification device

A fingerprint identification device, in particular, a fingerprint recognition device directly integrated on a touch panel, a color filter (CF), a thin film transistor (TFT), a liquid crystal module (Liquid Crystal Module) , LCM), on any one of them, to improve the fingerprint identification accuracy of the fingerprint identification device.

With the rapid development of multimedia technology, more and more smart portable electronic devices such as mobile phones, personal digital assistants (PDAs), digital cameras, personal notebook computers or tablets or wearable devices have become people. A must-have tool in life. However, these portable electronic devices are highly personal. Therefore, once these portable electronic devices are stolen or lost, the information stored therein, such as phone books, photos, materials, etc., may be used by others, causing unnecessary losses.

Therefore, such products need to be matched with certain identity authentication and permission management to ensure the privacy of users. The main method of identity authentication currently used is password protection, and the user needs to input the correct password to the portable electronic device before entering the control page of the portable electronic device. However, password protection is less secure because passwords are more likely to be compromised or compromised. And if the user forgets the password, it is also very troublesome. Therefore, there is adoption Fingerprint identification identity authentication portable electronic device asked the market. Since each person's fingerprints are different, the unique characteristics of the fingerprints make the security of identity authentication using fingerprint recognition much improved. Moreover, the method of using identity authentication using fingerprint identification is relatively convenient, so that the user can save the cumbersome memory and password entry.

The current fingerprint identification system is widely used in handheld devices or mobile devices. The most common fingerprint identification devices are independently designed, for example, on a fixed side of a notebook computer keyboard or a fixed position on the back side or the bottom side of a hand-held mobile device. It cannot be effectively integrated on the touch screen of the handheld mobile device to reduce the volume of the handheld mobile device, and the conventional fingerprint identification chip package module mainly includes a substrate, a wafer and a mold body. The wafer is disposed on the substrate and electrically connected to the substrate, and the mold body covers the surface of the substrate and the wafer.

In the prior art, the sensing circuit and the metal trace or the chip must be disposed on a substrate made of a single wafer, integrated into a fingerprint identification device, and then combined with a touch panel or other device. The overall thickness of the fingerprint identification device provided by the prior art is also relatively thick, and it is easy to integrate the thinner device due to the thickness affecting the accuracy of the fingerprint identification and the thickness consideration.

Furthermore, when the finger touches the sensing region of the wafer, the wafer package is covered with a multilayer film, so that the overall thickness of the chip package module is high, and the chip package module has low sensitivity.

In addition, the conventional slip fingerprint identification system has directionality, and the recognition time is too long and must be set independently, which is very poor in structural integration or ease of use.

Therefore, in order to effectively solve the above problems, the main purpose of the present invention is to provide a fingerprint recognition device directly integrated on a touch panel, a color filter (CF), a film. A fingerprint recognition device integrated into any one of a TFT (Thin-Film Transistor, TFT) and a Liquid Crystal Module (LCM).

In order to achieve the above object, the present invention provides a fingerprint identification device formed on a base; the base has an upper side and a lower side, and the fingerprint identification device is selectively disposed on either of the upper and lower sides.

The fingerprint identification device has a photoresist layer, a first cladding layer, a first fingerprint identifying electrode layer, a first protective layer, a second fingerprint identifying electrode layer, a second protective layer, and a first protective layer. a wire layer, a flexible substrate; the photoresist layer is selected to be disposed on any one of the base and the lower side; the first cladding layer is disposed on a side of the photoresist opposite to the base; the first fingerprint The identification electrode layer is disposed on a side of the first cladding layer opposite to the photoresist layer, and has a plurality of first fingerprint recognition electrodes; the first protection layer covers a portion of the first fingerprint identification electrode layer; the second fingerprint The identification electrode layer is disposed on a side of the first fingerprint identification electrode layer opposite to the protection layer, and the second fingerprint recognition electrode layer has a plurality of second fingerprint recognition electrodes; the second protection layer covers a portion of the second fingerprint identification electrode layer The wire layer has a plurality of metal wires, and the metal wires are electrically connected to the first and second fingerprint identifying electrode layers; the flexible substrate is electrically connected to the first and second fingerprint identifying electrode layers and the wire layer.

Through the creation department, the fingerprint identification device is directly integrated and manufactured on a touch panel, a color filter (CF), a thin film transistor (TFT), a liquid crystal module (Liquid Crystal Module, LCM). Or any of the glasses can not only increase the flexibility of the overall design of the display device, but also increase the accuracy of the fingerprint identification device due to the reduction in thickness.

1‧‧‧Fingerprint identification device

11‧‧‧Photoresist layer

12‧‧‧First coating

13‧‧‧First fingerprint identification electrode layer

13a‧‧‧ spacing

13b‧‧‧ lateral width

131‧‧‧First fingerprint identification electrode

14‧‧‧First protective layer

15‧‧‧Second fingerprint identification electrode layer

15a‧‧‧ spacing

151‧‧‧Second fingerprint recognition electrode

16‧‧‧Second protective layer

17‧‧‧Wire layer

171‧‧‧Metal wire

18‧‧‧Soft substrate

2‧‧‧ base

21‧‧‧ upper side

22‧‧‧ Lower side

23‧‧‧ glass substrate

231‧‧‧ first surface

2311‧‧‧ touch area

2312‧‧‧ Non-touch area

232‧‧‧ second surface

24‧‧‧Touch electrode layer

25‧‧‧First insulation

26‧‧‧Second insulation

27‧‧‧First touch electrode layer

28‧‧‧Second touch electrode layer

29‧‧‧metal trace layer

3‧‧‧shading layer

1 is a perspective exploded view of a first embodiment of the fingerprint identification device of the present invention; FIG. 1A is a partial enlarged view of the first embodiment of the fingerprint identification device of the present invention; 1 is a partial enlarged view of a first embodiment of the fingerprint identification device of the present invention; and FIG. 2 is a first embodiment of the fingerprint identification device of the present invention. 3 is a sectional view of a second embodiment of the fingerprint identification device of the present invention; FIG. 4 is a schematic diagram of the first and second fingerprint recognition electrodes of the fingerprint identification device of the present invention; Another schematic diagram of the first and second fingerprint recognition electrodes of the fingerprint identification device of the present invention.

The above object of the present invention, as well as its structural and functional features, will be described in accordance with the preferred embodiments of the drawings.

Please refer to FIG. 1, 1A, 1B, 1C, and 2, which are perspective exploded, partially enlarged, and combined cross-sectional views of the first embodiment of the fingerprint identification device of the present invention. As shown in the figure, the present fingerprint identification device 1 is The system is formed on a base 2, which is a color filter (CF), a thin film transistor (TFT), a liquid crystal module (LCM), and a touch. Any of the panels.

The base portion 2 has an upper side 21 and a lower side 22, and the base portion 2 of the embodiment is a touch panel as an illustrative embodiment, but is not limited thereto, and the fingerprint identification device 1 is selectively disposed on the upper and lower sides. 21, 22, the touch panel (base 2) comprises: a glass substrate 23, a touch electrode layer 24, a first insulating layer 25, a second insulating layer 26, a shielding layer 3; The glass substrate 23 has a first surface 231 and a second surface 232 and defines a touch area 2311 and a non-touch area 2312 on the first surface 231. The non-touch area 2312 is adjacent to the touch. In the control area 2311, the shielding layer 3 selects the non-touch area 2312 disposed on the first and second surfaces 231 and 232. The touch electrode layer 24 is disposed on the touch surface 2311 of the second surface 232 of the glass substrate 23; the touch electrode layer 24 has a plurality of first touch electrodes 241 and a plurality of second touch electrodes 242. And the plurality of metal traces 243, the first and second touch electrodes 241, 242 are selectively electrically connected to the metal traces 243; the first insulating layer 25 covers the first and second touch electrodes 241, The second insulating layer 26 covers the touch electrode layer 24 and the first insulating layer 25 .

The fingerprint identification device 1 has a photoresist layer 11, a first cladding layer 12, a first fingerprint identification electrode layer 13, a first protection layer 14, and a second fingerprint identification electrode layer 15, a second protective layer 16, a wire layer 17, a flexible substrate 18; the base 2 has an upper side 21 and a lower side 22, the base 2 is a color filter (CF), a thin film transistor (Thin-Film Transistor, TFT), Liquid Crystal Module (LCM), this embodiment uses a touch panel as an illustration, but is not limited.

The photoresist layer 11 is selected from the base portion 2 and the lower side 21, 22, and the embodiment is provided on the upper side 21 (ie, the first surface 231 of the glass substrate 23) as an illustration but is not The first cladding layer 12 is disposed on one side of the photoresist layer 11 opposite to the base portion 2.

The first fingerprint electrode layer 13 is disposed on one side of the first cladding layer 12 opposite to the photoresist layer 11 and has a plurality of first fingerprint recognition electrodes 131. The first protection layer 14 covers the first fingerprint identification. A portion of the electrode layer 13 is partially exposed to the outside of the first protective layer 14 .

The second fingerprint identifying electrode layer 15 is disposed on one side of the first protective layer 14 opposite to the first fingerprint identifying electrode layer 13 , and the second fingerprint identifying electrode layer 15 has a plurality of second fingerprint identifying electrodes 151 ; The protective layer 16 covers a portion of the second fingerprint identifying electrode layer 15 such that the second fingerprint identifying electrode layer 15 is partially exposed outside the second protective layer 16.

The wire layer 17 has a plurality of metal wires 171, and the metal wires 171 are selected before The first and second fingerprint identification electrode layers 13 and 15 are electrically connected.

The flexible substrate 18 is electrically connected to the first and second fingerprint identifying electrode layers 13 and 15 and the wiring layer 17. The flexible substrate 18 and the first and second fingerprint identifying electrode layers 13 and 15 are not the first The portion covered by the two protective layers 14, 16 and the portion of the conductive layer 17 not covered are electrically connected.

The first and second fingerprint identifying electrode layers 13 and 15 are insulated by the first protective layer 14 , and the first fingerprint identifying electrodes 131 are connected by a bridge. The second fingerprint identifying electrodes 151 are connected. The connection is made by means of bridges.

This creation is mainly to improve the traditional fingerprint identification device can only be independently fabricated on the silicon wafer and then integrated with the touch panel or other devices to complete the fingerprint identification function.

Please refer to FIG. 3 , which is a sectional view of a combination of the second embodiment of the fingerprint identification device of the present invention. As shown in the figure, some structural features of the embodiment are the same as those of the first embodiment, and therefore will not be herein. The first embodiment differs from the first embodiment in that the touch panel (base 2) of the embodiment includes a glass substrate 23, a first touch electrode layer 27, and a first An insulating layer 25, a second touch electrode layer 28, a second insulating layer 26, a metal wiring layer 29, and a shielding layer 3; the glass substrate 23 has a first surface 231 and a second surface 232. A touch area 2311 and a non-touch area 2312 are defined on the first surface 231. The non-touch area 2312 is adjacent to the touch area 2311. The shielding layer 3 is selectively disposed on the first and second surfaces 231. The second touch electrode layer 27 is disposed on the second surface 232 of the glass substrate 23, the first touch electrode layer 27 has a plurality of first touch electrodes 271; The first insulating layer 25 covers the first touch electrode layer 27; the second touch electrode layer 28 is disposed on the first An insulating layer 25 is opposite to one side of the first touch electrode layer 27, the second touch electrode layer 28 has a plurality of second touch electrodes 281; and the second insulating layer 26 covers the second touch electrode layer 28 The metal trace layer 29 is selectively electrically connected to the first and second touch electrode layers 27 and 28 .

In the first and second embodiments of the present invention, the first cladding layer 12 is a ruthenium dioxide film, and the adhesion of the entire layer is improved by the ruthenium dioxide film; and the first and second fingerprints are recognized. The electrodes 131 and 151 may be in any one of a circular shape, a square shape, a triangular shape and a trapezoidal shape. The photoresist layer 11 is white or black or transparent. The photoresist layer 11 is a high temperature resistant ink. It can withstand at least 260 degrees to 300 degrees; the first and second protective layers are either a protective film (OVER COAT) or a cerium oxide (SiO 2 ) film.

Please refer to FIG. 4 , which is a schematic diagram of the first and second fingerprint recognition electrodes of the fingerprint identification device of the present invention. As shown in the figure, the first fingerprint recognition electrodes 131 are connected to each other, and the second fingerprint recognition electrodes 151 are connected to each other. And the first and second fingerprint identifying electrodes 131, 151 have an area of 20 um ² to 50 um ² ; the first fingerprint identifying electrodes 131 extend longitudinally (see the base 2 of FIG. 1 ), the first The spacing 13a between the fingerprint recognition electrodes 131 is 10 um to 40 um, and the optimum spacing between the first fingerprint recognition electrodes 131 is 38 um; the second fingerprint recognition electrodes 151 are laterally (refer to the base 2 of FIG. 1). The distance between the second fingerprint recognition electrodes 151 is 10um~40um, and the spacing between the second fingerprint recognition electrodes 151 is 38um; and the first and second fingerprint recognition electrodes 131 and 151 are It is a transparent electrode.

Please refer to FIG. 5 , which is another schematic diagram of the first and second fingerprint recognition electrodes of the fingerprint identification device of the present invention. As shown in the figure, the lateral width of the first fingerprint recognition electrodes 12 is 10 um to 30 um. The longitudinal width of the second fingerprint recognition electrode is 10 um to 30 um, and the first fingerprint recognition electrode 13 and the second fingerprint recognition electrode 15 are disposed corresponding to each other at a width of 15 b to a width of 10 um.

The fingerprint identification device 1 of the present invention is mainly used to directly integrate the components of the touch panel or other display device to be thinned, thereby thinning the overall thickness of the fingerprint identification device and eliminating the use of the germanium substrate as a base material. In turn, the capacitance sensing amount is improved to improve the accuracy of the overall fingerprint identification.

The fingerprint identification device 1 of the present invention is mainly disposed on the surface of the touch panel (base 2) where the fingerprint identification device 1 is to be disposed, or a layer of photoresist layer is deposited by sputtering or sputtering or coating. Depositing or depositing a thin film of ruthenium dioxide to form the first cladding layer 12 for increasing adhesion rate, and then depositing a film which can be used as a material for fingerprint identification sensing electrodes on the first cladding layer 12 And aligning the first fingerprint recognition electrodes 131 on the first cladding layer 12 and forming a plurality of metal wires 171 electrically connected to the first fingerprint recognition electrodes 131. And then depositing a first protective layer 14 protective film (OVER COAT) covering the formed first fingerprint identifying electrodes 131 for insulation, and depositing a layer on the first protective layer 14 Fingerprinting the film of the material used for the sensing electrode on the first protective layer 14 and then completely arranging the second fingerprint identifying electrodes 151 on the first protective layer 14 by means of yellow etching, and forming a portion a plurality of metal wires 171 electrically connected to the second fingerprint electrode 151, and finally a second protective layer 16 protective film (OVER COAT) covering the formed second fingerprint electrodes 151 and the metal The wire 171 is used as a package insulation, and since the first and second touch electrodes 131 and 151 are not covered by the first and second protective layers 14 and 16, the portions can be electrically connected to the flexible substrate. connection.

Through the fingerprint identification device 1 of the present invention, the fingerprint identification device 1 can be placed at any place where it is desired to be installed, and it is not necessary to further reduce the manufacturing cost by using the silicon wafer as a substrate, and the fingerprint identification device 1 can be thinned. And reducing the spacing between the sensing electrodes, thereby improving the accuracy of the fingerprint identification.

1‧‧‧Fingerprint identification device

11‧‧‧Photoresist layer

12‧‧‧First coating

13‧‧‧First fingerprint identification electrode layer

131‧‧‧First fingerprint identification electrode

14‧‧‧First protective layer

15‧‧‧Second fingerprint identification electrode layer

151‧‧‧Second fingerprint recognition electrode

16‧‧‧Second protective layer

17‧‧‧Wire layer

171‧‧‧Metal wire

18‧‧‧Soft substrate

2‧‧‧ base

21‧‧‧ upper side

22‧‧‧ Lower side

23‧‧‧ glass substrate

231‧‧‧ first surface

2311‧‧‧ touch area

2312‧‧‧ Non-touch area

232‧‧‧ second surface

24‧‧‧Touch electrode layer

25‧‧‧First insulation

26‧‧‧Second insulation

3‧‧‧shading layer

Claims (12)

A fingerprint identification device is formed on a base portion: a base portion having an upper side and a lower side; a fingerprint identification device having: a photoresist layer selected to be disposed above and below the base portion; a first cladding layer disposed on a side opposite to the base of the photoresist layer; a first fingerprint recognition electrode layer disposed on a side of the first cladding layer opposite to the photoresist layer and having a plurality of first a first fingerprint layer covering a portion of the first fingerprint identifying electrode layer; a second fingerprint identifying electrode layer disposed on a side of the protective layer opposite to the first fingerprint identifying electrode layer, the second fingerprint The identification electrode layer has a plurality of second fingerprint identification electrodes; a second protection layer covering the second fingerprint identification electrode layer portion; a wire layer having a plurality of metal wires, and the metal wire systems are selected from the first and second The fingerprint identification electrode layer is electrically connected; a flexible substrate electrically connecting the first and second fingerprint identification electrode layers and the wire layer. The fingerprint identification device of claim 1, wherein the base is a touch panel, comprising: a glass substrate having a first surface and a second surface, and the first surface Defining a touch area and a non-touch area, wherein the non-touch area is adjacent to the touch area; and a masking layer is selected from any one of the first and second surfaces of the non-touch area; The electrode layer is disposed on the second surface of the glass substrate, the touch electrode layer has a plurality of first touch electrodes and a plurality of second touch electrodes and a plurality of metal traces, and the first and second touch electrode systems are selected The metal traces are electrically connected; a first insulating layer covers the first and second touch electrode junctions; a second insulating layer covers the touch electrode layer and the first insulating layer. The fingerprint identification device of claim 1, wherein the base is a touch panel, comprising: a glass substrate having a first surface and a second surface, and the first surface Defining a touch area and a non-touch area, the non-touch area is adjacent to the touch area; and a shielding layer is selected from any one of the first and second surfaces of the non-touch area; The touch electrode layer is disposed on the second surface of the glass substrate, the touch electrode layer has a plurality of first touch electrodes; a first insulating layer covering the first touch electrode layer; and a second touch electrode layer The second insulating layer has a plurality of second touch electrodes; and a second insulating layer covers the second touch electrode layer; A metal wiring layer is electrically connected to the first and second touch electrode layers. The fingerprint identification device of claim 1, wherein the first coating layer is a ceria film. The fingerprint identification device of claim 1, wherein the first and second fingerprint identification electrodes are in any one of a circular shape, a square shape, a triangle shape, and a trapezoidal shape, and the first and second fingerprints are identified. The area of the electrode is 20um ² ~ 50um ² . The fingerprint identification device of claim 1, wherein a spacing between the first fingerprint recognition electrodes is 10 um to 40 um, and an optimum spacing between the first fingerprint recognition electrodes is 38 um; the second The distance between the fingerprint recognition electrodes is 10 um to 40 um, and the optimal spacing between the second fingerprint recognition electrodes is 38 um. The fingerprint identification device of claim 1, wherein the first and second fingerprint recognition electrodes are transparent electrodes. The fingerprint identification device of claim 1, wherein the base is a color filter (CF), a thin film transistor (TFT), a liquid crystal module (Liquid Crystal Module). , LCM) Any. The fingerprint identification device of claim 1, wherein the first fingerprint recognition electrodes have a lateral width of 10 um to 30 um, and the second fingerprint recognition electrodes have a longitudinal width of 10 um to 30 um. The fingerprint identification device of claim 9, wherein the first fingerprint identification electrode and the second fingerprint recognition electrode are disposed at a lateral width of 10 um. The fingerprint identification device of claim 1, wherein the photoresist layer is white or black or transparent, and the photoresist layer is a high temperature resistant ink and can withstand at least 260 to 300 degrees. high temperature. The fingerprint identification device of claim 1, wherein the first and second protective layers are any one of an OVER COAT or a SiO ₂ film.