TW201926126A - Card having fingerprint recognition function - Google Patents

Abstract

A card having fingerprint recognition function is disclosed. The disclosure includes: a substrate, a first electrode area, an upper flexible board, and a second electrode area. The first electrode area is located on the surface of the RF fingerprint recognition chip, and connected to the substrate through the bottom of the RF fingerprint recognition chip. The upper flexible board is located on the substrate and having an open port which is located on the first electrode area to make the first electrode exposure in the air. The second electrode is formed surrounding the open port of the upper flexible board, and isolated with the first electrode. The first electrode and the second electrode are connected to the RF fingerprint recognition chip for a finger touching to generate a fingerprint data.

Description

Fingerprint identification card

The present invention relates to a card, and more particularly to a fingerprint identification card.

At present, almost every person has access control cards, ATM cards, cash cards (such as leisure cards, card), and most of these cards use chip cards or RFID technology systems. These two types of systems are currently the mainstream of such card-type personal identity authentication technologies. However, these two types of technologies have their technical disadvantages, that is, as long as they have a card, anyone can use it, that is, without the function of true personal identification. This also increases the likelihood of various crimes.

Therefore, how to use biometric technology has become the focus of this type of application. At present, the biometric technology applied to cards is most likely to be fingerprint identification technology. The fingerprint identification technology is to scan the fingerprint image of the finger, and then compare the fingerprint image with the fingerprint image of the database, and then determine whether the scanned fingerprint is a party in the database. At present, there are three kinds of fingerprint identification technologies: optical, capacitive, and radio frequency. The optical fingerprint scanner uses light to capture fingerprint images. The scanner itself must have a light source (usually an LED light) to evenly hit the fingerprint contact surface. The ridges and grooves on the finger will react differently to the light. Therefore, fingerprint images can be drawn. However, general optical fingerprint identification products are large in size and costly. Therefore, it cannot be applied to card-type fingerprint recognition, and is currently applied to the access control system.

Capacitive fingerprint scanners use the principle of human body electrostatics to identify fingerprint images. They are used as sensors by the capacitive plates implanted in the semiconductor wafer. When the finger is placed on it, the original charge distribution is changed, due to the ridge pattern of the fingers. The amount of charge absorbed by the groove is different, so the fingerprint image can be obtained accordingly.

The RF fingerprint scanner sends RF signals to the finger through two electrodes, and intercepts the RF reflection signal from the dermis layer to draw a fingerprint image. Since the radio frequency wave enters the dermis layer of the skin, the reflection distance and time are different due to the peaks and valleys formed by the ridges and grooves of the fingerprint, so that the image data of the fingerprint shape can be obtained.

At present, the fingerprint identification technology that is more likely to be applied to cards is capacitive and radio frequency. At present, only the capacitive type is applied to the card type fingerprint identification on the market, and the radio frequency type has not yet obtained a technological breakthrough. Therefore, how to develop an architecture that enables RF fingerprinting technology to be applied to cards has become a development direction that fingerprint identification technology developers are hoping for.

In order to achieve the above object, the present invention provides a fingerprint identification card structure, so that the radio frequency fingerprint identification technology can be applied to a fingerprint identification card; the present invention uses a soft upper cover plate and one of the electrodes of the radio frequency fingerprint identification technology. Formed on the soft upper cover, the fingerprint identification card can use the RF fingerprint identification technology, and achieve the technical effect of being thin, flexible and highly accurate. .

The invention provides a fingerprint identification card, which is used for radio frequency fingerprint identification, and comprises: a substrate; a first electrode region is located on the surface of the radio frequency fingerprint identification chip, and is transmitted through the radio frequency The bottom of the fingerprint identification wafer is connected to the substrate; a soft upper cover is disposed on the substrate, the flexible upper cover has an opening, and the opening is disposed in the first electrode region to completely expose the first electrode region; a second electrode region is formed around the opening of the flexible upper cover to surround the first electrode region, and the second electrode region is isolated from the first electrode region; wherein the first electrode region transmits a radio frequency fingerprint The bottom of the identification wafer is connected to the second electrode area, thereby contacting a finger to generate a fingerprint data.

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

1‧‧‧ finger

2‧‧‧ fingerprint

Section 3‧‧‧

100‧‧‧Substrate

200‧‧‧First electrode zone

300‧‧‧Soft upper cover

400‧‧‧second electrode zone

401, 402, 403‧‧‧second electrode area

500‧‧‧ openings

Figure 1 is a perspective exploded view of the fingerprint identification card of the present invention.

Figure 2 is a top view of the fingerprint identification card of the present invention.

Fig. 3A is a partially enlarged cross-sectional view along the line A-A of the second embodiment of the fingerprint identification card of the present invention.

Fig. 3B is a partially enlarged cross-sectional view along the line A-A of the second embodiment of the fingerprint identification card of the present invention.

Fig. 3C is a partially enlarged cross-sectional view along the line A-A of Fig. 2 in another embodiment of the fingerprint identification card of the present invention.

According to an embodiment of the present invention, the present invention provides a fingerprint identification card structure, and the RFID fingerprint identification technology can be applied to a fingerprint identification card; the present invention utilizes a soft upper cover plate and adopts a radio frequency fingerprint identification technology. One of the electrodes is formed on the soft upper cover, so that the fingerprint identification card can use the radio frequency fingerprint identification technology, and achieves the technical effect of being thin, flexible, and highly accurate.

Please refer to FIG. 1 first, which is a perspective exploded view of the fingerprint identification card of the present invention. The fingerprint identification card of the present invention is applied to radio frequency fingerprint identification, and comprises: a substrate 100, a first electrode region 200, a soft upper cover 300 and a second electrode region 400. The first electrode region 200 is located on the surface of the radio frequency fingerprint recognition chip. The bottom of the wafer is connected to the substrate 100 through the bottom of the radio frequency fingerprint identification. The flexible upper cover 300 is disposed on the substrate 100. The flexible upper cover 300 has an opening 500 and an opening 500. The position of the first electrode region 200 is completely exposed in the first electrode region 200; the second electrode region 400 is formed around the opening 500 of the flexible upper cover 300 to surround the first electrode region 400, and the second electrode region 400 is first The electrode regions 200 are isolated from each other; wherein the first electrode region 200 is located on the surface of the radio frequency fingerprint recognition wafer, and is connected to the substrate 100 and connected to the second electrode region 400 through the bottom of the RF fingerprint identification wafer, thereby contacting the finger to generate fingerprint data.

Next, please refer to FIG. 2, a top view of the fingerprint identification card of the present invention. Due to the opening 500 of the flexible upper cover 300, the fingerprint identification card of the present invention can see the first electrode region 200 on the lower substrate 100 as seen from above, and can be seen that the first electrode region 200 is soft and The second electrode regions 400 on the cover 300 are isolated from each other. Since the first electrode region 200 is located on the surface of the radio frequency fingerprint recognition chip, the bottom of the wafer is connected to the substrate 100 through the RF fingerprint identification, and the two are connected to the second electrode region 400. Therefore, the two are in an isolated state.

Next, several embodiments will be explained to illustrate the first electrode region of the present invention. The relative relationship between 200 and the second electrode region 400, and the dissimilar state of the second electrode region 400 is explained.

Next, please refer to FIG. 3A, which is an enlarged view of a section 3 of the section of the fingerprint identification card of the present invention, and FIG. 2 is a second electrode region 401 formed on the flexible upper cover 300. The side of the opening 500 surrounds the opening 500. Since the finger 1 directly contacts the second electrode region 401 and the first electrode region 200, the fingerprint 2 on the finger 1 allows the radio frequency wave to enter the finger 1, and is formed by the peaks and valleys formed by the ridges and grooves of the fingerprint. The reflection distance and time are different, and the image data of the fingerprint shape is obtained by calculation of the radio frequency fingerprint recognition wafer.

Please refer to FIG. 3B , which is a further enlarged view of a section 3 of the fingerprint identification card of the present invention. FIG. 2 is a cross-sectional view of the second electrode region 402 formed on the flexible upper cover 300. The side of the opening 500 and the upper side of the flexible upper cover 300 are adjacent to the opening 500 to surround the opening 500.

Please refer to FIG. 3C , which is a partial enlarged view of a section 3 of the fingerprint identification card of the present invention. FIG. 2 is a cross-sectional view of the second electrode region 403 formed on the flexible upper cover 300. The opening 500 is surrounded by the opening 500.

In the embodiments of FIGS. 3A, 3B, and 3C, the finger 1 can directly contact the second electrode regions 401, 402, and 403 and the first electrode region 200, thereby allowing the RFID fingerprint chip to obtain fingerprint data, and then Perform fingerprint identification.

The soft upper cover 300 may be a polyethylene terephthalate (PET) upper cover, a polyethylene terephthalate (PEN) upper cover, and a polyamidamine (PI) upper cover.

Moreover, the above various embodiments all have an embodiment in which the opening 500 is rectangular. In other embodiments, the shape of the opening 500 may be square, rectangular, circular or elliptical. Correspondingly, the shapes of the first electrode region 200 and the second electrode region 400 may also be square, rectangular, circular or elliptical.

Although the technical content of the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any modifications and refinements made by those skilled in the art without departing from the spirit of the present invention are encompassed by the present invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

Claims (8)

A fingerprint identification card is used for radio frequency fingerprint identification, comprising: a substrate; a first electrode area is located on the surface of the radio frequency fingerprint identification chip, and is connected to the substrate through the bottom of the radio frequency fingerprint identification; a soft upper cover, configured The flexible upper cover has an opening disposed in the first electrode region to completely expose the first electrode region, and a second electrode region formed around the opening of the flexible upper cover And surrounding the first electrode region, the second electrode region and the first electrode region are isolated from each other; wherein the first electrode region is connected to the second electrode region through the bottom of the radio frequency fingerprint identification chip, thereby contacting a finger to generate A fingerprint data. The fingerprint identification card according to claim 1, wherein the soft upper cover is selected from the group consisting of a polyethylene terephthalate (PET) upper cover and a polyethylene terephthalate (PEN) upper cover. Polyimide (PI) upper cover. The fingerprint identification card of claim 1, wherein the opening is square, rectangular, circular or elliptical. The fingerprint identification card of claim 1, wherein the first electrode region is square, rectangular, circular or elliptical. The fingerprint identification card of claim 1, wherein the second electrode region is square, rectangular, circular or elliptical. The fingerprint identification card of claim 1, wherein the second electrode region is formed on a side of the opening of the flexible upper cover to surround the opening. The fingerprint identification card of claim 1, wherein the second electrode region is formed above the flexible upper cover near the opening to surround the opening. The fingerprint identification card of claim 1, wherein the second electrode region is formed on a side of the opening of the flexible upper cover and above the flexible upper cover to surround the opening.