Fingerprint identification chip packaging structure

Abstract

The utility model discloses a fingerprint identification chip packaging structure, which relates to the technical field of packaging and comprises a substrate, a packaging body is arranged at the top end of the substrate, a bonding layer is arranged in the packaging body and located at the top end of the substrate, and a fingerprint identification chip is arranged at the top end of the bonding layer. A plurality of pins are arranged on the two sides of the fingerprint identification chip, one end of each pin penetrates through the side wall of the packaging body and extends to the outside of the packaging body, a sealing assembly is arranged between the packaging body and the pins, and metal wires are arranged between the pins and the fingerprint identification chip; an optical assembly is arranged at the top of the packaging body and above the fingerprint identification chip; the top of the packaging body is provided with a groove, and the bottom end of the groove is provided with a through hole. According to the utility model, physical protection is provided for the fingerprint identification chip, moisture, dust and other pollutants are effectively prevented from invading, the problems of thermal expansion and contraction can be better solved compared with plastic package materials, and internal stress caused by long-term temperature change can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, and in particular to a fingerprint recognition chip packaging structure. Background Art

[0002] Fingerprint recognition chips are used to process fingerprint data to achieve biometric recognition. The collected fingerprint image is converted into digital information and matched with the stored fingerprint template to verify the individual's identity. This chip is widely used in smart phones, access control systems, security locks and other fields, and is an indispensable part of modern security verification systems.

[0003] The fingerprint recognition chip packaging structure is the physical structure that packages the fingerprint recognition chip and its related components together. The packaging structure design not only protects the chip from physical and environmental damage, but also integrates the necessary optical and electronic components to ensure accurate collection and processing of fingerprint data.

[0004] The fingerprint recognition chip packaging structure in the prior art, the patent document with application number 201420526888.8 discloses a fingerprint recognition sensor packaging structure, which includes an inner pin and an outer pin, the inner pin is located above the outer pin, and the periphery of the inner pin and the outer pin is filled with a first plastic packaging material, adopting an integrated packaging, and the structure is simple. However, the above structure still has the following shortcomings: the structure adopts a plastic packaging material to protect the pin and the internal structure, and the plastic packaging material usually becomes very hard after curing. At the same time, the thermal expansion coefficient of the plastic packaging material and the pin material may be different, and long-term temperature changes may generate stress between the packaging material and the pin, affecting reliability.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] In view of the problems in the related technology, the utility model proposes a fingerprint recognition chip packaging structure to overcome the above technical problems existing in the existing related technology.

[0007] To this end, the specific technical solutions adopted by the utility model are as follows:

[0008] A fingerprint recognition chip packaging structure comprises a substrate, a packaging body is arranged on the top of the substrate, an adhesive layer is arranged inside the packaging body and located at the top of the substrate, and a fingerprint recognition chip is arranged on the top of the adhesive layer; a plurality of pins are arranged on both sides of the fingerprint recognition chip, one end of the pins passes through the side wall of the packaging body and extends to the outside of the packaging body, a sealing component is arranged between the packaging body and the pins, and a metal wire is arranged between the pins and the fingerprint recognition chip; an optical component is arranged on the top of the packaging body and located above the fingerprint recognition chip; a groove is arranged on the top of the packaging body, and a through hole is arranged at the bottom of the groove.

[0009] Furthermore, in order to prevent moisture, dust and other environmental factors from invading the interior of the packaging structure, the sealing assembly includes a first sealing strip arranged between the two sides of the pin and the bottom end of the package body, and a second sealing strip is arranged on the inner wall of the package body and at the top of the pin; a card slot is arranged at the top of the inner wall of the package body, and a card block is arranged in the card slot, and one side of the card block extends to the outside of the card slot and is connected to the top of the second sealing strip.

[0010] Furthermore, in order to focus the optical image and improve the clarity and accuracy of fingerprint recognition, the optical component includes a lens arranged in the groove, a light-transmitting plate is arranged on the top of the lens; and a connecting layer is arranged between the lens and the light-transmitting plate.

[0011] The beneficial effects of the utility model are:

[0012] (1) The utility model provides physical protection for the fingerprint recognition chip, prevents damage to the chip caused by external impact and environmental factors, enhances the sealing of the package, and effectively prevents the intrusion of moisture, dust and other contaminants. At the same time, compared with plastic packaging materials, the sealing component can better cope with the problem of thermal expansion and contraction, which helps to reduce the internal stress caused by long-term temperature changes.

[0013] (2) By setting up a sealing component, moisture, dust and other environmental factors are prevented from invading the interior of the packaging structure, and the stress between thermal expansion and contraction caused by temperature changes can be reduced. At the same time, the design of the card slot and the card block increases the structural stability of the sealing component.

[0014] (3) By setting up the optical components, it helps to focus the optical image and improve the clarity and accuracy of fingerprint recognition. The light-transmitting plate transmits light evenly, ensuring that the light distribution in the fingerprint recognition area is even, thereby improving the recognition performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a fingerprint recognition chip packaging structure according to an embodiment of the utility model;

[0017] Figure 2 is a cross-sectional view of a fingerprint recognition chip packaging structure according to an embodiment of the utility model;

[0018] Figure 3 yes Figure 2A partial enlarged view of the middle A;

[0019] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle;

[0020] Figure 5 It is a structural schematic diagram of a package body in a fingerprint recognition chip packaging structure according to an embodiment of the utility model.

[0021] In the figure:

[0022] 1. Substrate; 2. Package; 3. Adhesive layer; 4. Fingerprint recognition chip; 5. Pins; 6. Sealing component; 601. First sealing strip; 602. Second sealing strip; 603. Card slot; 604. Card block; 7. Metal wire; 8. Optical component; 801. Lens; 802. Transparent plate; 803. Connection layer; 9. Groove; 10. Through hole. DETAILED DESCRIPTION

[0023] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] According to an embodiment of the utility model, a fingerprint recognition chip packaging structure is provided.

[0025] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-5 As shown, the fingerprint recognition chip packaging structure according to the embodiment of the utility model includes a substrate 1, a packaging body 2 is arranged on the top of the substrate 1, an adhesive layer 3 is arranged inside the packaging body 2 and located at the top of the substrate 1, a fingerprint recognition chip 4 is arranged on the top of the adhesive layer 3, and in addition, the bottom of the packaging body 2 is bonded to the substrate 1; a plurality of pins 5 are arranged on both sides of the fingerprint recognition chip 4, one end of the pin 5 passes through the side wall of the packaging body 2 and extends to the outside of the packaging body 2, a sealing component 6 is arranged between the packaging body 2 and the pin 5, and a metal wire 7 is arranged between the pin 5 and the fingerprint recognition chip 4; an optical component 8 is arranged on the top of the packaging body 2 and located above the fingerprint recognition chip 4; a groove 9 is arranged on the top of the packaging body 2, and a through hole 10 is arranged at the bottom of the groove 9.

[0026] With the help of the above scheme, the utility model provides physical protection for the fingerprint recognition chip 4, prevents external impacts and environmental factors from damaging the chip, enhances the sealing of the package, and effectively prevents the intrusion of moisture, dust and other contaminants. At the same time, compared with plastic packaging materials, the sealing component 6 can better cope with the problems of thermal expansion and contraction, and helps to reduce internal stress caused by long-term temperature changes.

[0027] In one embodiment, for the above-mentioned sealing component 6, the sealing component 6 includes a first sealing strip 601 arranged between the two sides of the pin 5 and the bottom end of the package body 2, and a second sealing strip 602 is arranged on the inner wall of the package body 2 and at the top of the pin 5, wherein the first sealing strip 601 and the second sealing strip 602 are made of rubber, silicone and other materials, and the rubber material has good elasticity and can absorb the stress caused by different thermal expansion coefficients; a card slot 603 is arranged on the top of the inner wall of the package body 2, and a card block 604 is arranged in the card slot 603, one side of the card block 604 extends to the outside of the card slot 603 and is connected to the top of the second sealing strip 602, so as to prevent moisture, dust and other environmental factors from invading the interior of the packaging structure, and can reduce the stress between thermal expansion and contraction caused by temperature changes. At the same time, the design of the card slot 603 and the card block 604 increases the structural stability of the sealing component 6.

[0028] The working principle of the sealing assembly 6 is as follows: the first sealing strip 601 provides a preliminary seal at the pin 5 to prevent contaminants from entering through the gap between the pin 5 and the package body 2. The second sealing strip 602 is arranged on the inner side wall of the package body 2, located at the top of the pin 5, and provides additional sealing protection for the pin 5 to ensure that the connection between the top of the pin 5 and the package body 2 is effectively isolated. The card slot 603 is arranged at the top of the inner side wall of the package body 2, and is used to fix the card block 604 and the second sealing strip 602 to ensure the structural stability of the sealing assembly 6.

[0029] In one embodiment, for the above-mentioned optical component 8, the optical component 8 includes a lens 801 arranged in the groove 9, and a light-transmitting plate 802 is arranged on the top of the lens 801; a connecting layer 803 is arranged between the lens 801 and the light-transmitting plate 802, and the connecting layer 803 provides necessary bonding strength without interfering with light transmission, such as optical-grade adhesive, hot-melt adhesive film, etc., so as to help focus the optical image and improve the clarity and accuracy of fingerprint recognition. The light-transmitting plate 802 transmits light evenly, ensures that the light distribution in the fingerprint recognition area is even, and improves the recognition performance.

[0030] The working principle of the optical component 8 is as follows: light from the environment shines on the user's finger, and the fingerprint ridges and valleys on the surface of the finger reflect the light in different ways. The ridges reflect more light, while the valleys are relatively dark. The light-transmitting plate 802 allows the light reflected from the finger to pass through, and the light passing through the light-transmitting plate 802 forms a fingerprint image that is collected by the lens 801 below. The lens 801 is responsible for focusing these lights and projecting them onto the photosensitive element of the fingerprint recognition chip 4.

[0031] The photosensitive element on the fingerprint recognition chip 4 captures the image focused by the lens and converts it into an electrical signal. The electrical signal is then processed and analyzed to extract the characteristic points of the fingerprint. These characteristic points are used to match the fingerprint data stored in the database to complete the recognition process.

[0032] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0033] In actual application, the sensor inside the fingerprint recognition chip 4 captures the image formed by the finger. The image reflects the unique texture of the fingerprint, including ridges and valleys. The sensor converts the captured physical image into electronic signals, which are then sent to the signal processor inside the fingerprint recognition chip 4. The processor digitizes the electronic signal, including enhancing image quality, filtering out noise, and extracting key features (such as ridge end points and bifurcation points). The features are converted into a digitized fingerprint template and stored in a storage device. When it is necessary to verify the identity of the user, the collected new fingerprint template is compared with the pre-stored template. If the match is successful, the system confirms the user's identity and allows access or execution of the operation; if it does not match, access is denied.

[0034] The pin 5 ensures the electrical connection between the fingerprint recognition chip 4 and the external device, supplies power, transmits data, and receives external commands. The sealing component 6 protects the internal structure from the external environment and ensures long-term stable operation.

[0035] In summary, the utility model provides physical protection for the fingerprint recognition chip 4, prevents external impact and environmental factors from damaging the chip, enhances the sealing of the package, and effectively prevents the intrusion of moisture, dust and other contaminants. At the same time, compared with the plastic packaging material, the sealing component 6 can better cope with the problem of thermal expansion and contraction, and helps to reduce the internal stress caused by long-term temperature changes. By setting the sealing component 6, moisture, dust and other environmental factors are prevented from intruding into the interior of the packaging structure, and the stress between thermal expansion and contraction caused by temperature changes can be reduced. At the same time, the design of the card slot 603 and the card block 604 increases the structural stability of the sealing component 6. By setting the optical component 8, it is helpful to focus the optical image and improve the clarity and accuracy of fingerprint recognition. The light-transmitting plate 802 evenly transmits light, ensuring that the light distribution in the fingerprint recognition area is uniform, thereby improving the recognition performance.

[0036] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fingerprint recognition chip packaging structure, comprising a substrate (1), characterized in that: A packaging body (2) is arranged at the top of the substrate (1), an adhesive layer (3) is arranged inside the packaging body (2) and located at the top of the substrate (1), and a fingerprint recognition chip (4) is arranged at the top of the adhesive layer (3); A plurality of pins (5) are provided on both sides of the fingerprint recognition chip (4); one end of the pin (5) penetrates the side wall of the package (2) and extends to the outside of the package (2); a sealing component (6) is provided between the package (2) and the pin (5); and a metal wire (7) is provided between the pin (5) and the fingerprint recognition chip (4); An optical component (8) is arranged on the top of the packaging body (2) and above the fingerprint recognition chip (4).

2. The fingerprint recognition chip packaging structure according to claim 1, characterized in that: The top of the packaging body (2) is provided with a groove (9), and the bottom end of the groove (9) is provided with a through hole (10).

3. A fingerprint recognition chip packaging structure according to claim 1 or 2, characterized in that: The sealing component (6) comprises a first sealing strip (601) arranged between the two sides of the pin (5) and the bottom end of the package body (2), and a second sealing strip (602) is arranged on the inner side wall of the package body (2) and located at the top end of the pin (5).

4. The fingerprint recognition chip packaging structure according to claim 3, characterized in that: A card slot (603) is provided at the top of the inner side wall of the packaging body (2), a card block (604) is provided in the card slot (603), and one side of the card block (604) extends to the outside of the card slot (603) and is connected to the top end of the second sealing strip (602).

5. The fingerprint recognition chip packaging structure according to claim 2, characterized in that: The optical component (8) comprises a lens (801) arranged in the groove (9), and a light-transmitting plate (802) is arranged on the top of the lens (801).

6. The fingerprint recognition chip packaging structure according to claim 5, characterized in that: A connection layer (803) is provided between the lens (801) and the light-transmitting plate (802).

Images