CN114340149A

CN114340149A - Smart card fingerprint module and carrier band packaging form thereof

Info

Publication number: CN114340149A
Application number: CN202111436010.6A
Authority: CN
Inventors: 李丹
Original assignee: Beijing CEC Huada Electronic Design Co Ltd
Current assignee: Beijing CEC Huada Electronic Design Co Ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-04-12

Abstract

The invention discloses a smart card fingerprint module and a carrier tape packaging form thereof, which are mainly characterized in that a printed circuit board is used as a strip, 8 contacts conforming to ISO/IEC7816 are placed on the contact surface of the strip, a connecting circuit of components is designed on the packaging cover of the strip, a safety chip, a fingerprint processing chip, a power supply chip, a resistor and a capacitor are welded on the packaging cover, pins connected with an external device are designed into bonding pads and are placed around the packaging cover. The circuit components are tightly placed in the middle position and sealed and reinforced by the encapsulating glue to form a single module. The bonding pad that draws forth all around of envelope face includes: the intelligent card comprises a bonding pad connected with a fingerprint sensor chip, a bonding pad connected with an intelligent card antenna, a module state prompt signal bonding pad and a bonding pad used for module testing and code downloading. The modules are arranged in a standard intelligent card strip mode, and alignment tooth holes are formed in two sides of each module and assembled into a disc type tape winding type carrier tape, so that the intelligent card is convenient to process.

Description

Smart card fingerprint module and carrier band packaging form thereof

Technical Field

The invention relates to the field of smart card carrier tapes and smart card applications.

Background

The physical structure of the standard smart card is single chip equipment based on a security chip, namely pins of the security chip are packaged on a strip to form modules, the modules are arranged in a longitudinal mode according to two groups, and the two sides of the modules are provided with tooth holes for positioning to form a carrier band. The carrier band is suitable for a card base assembled after punching a module in batches of standard smart cards. The standard smart card is divided into three modes of contact type, non-contact type and double interfaces. The contact type intelligent card connects 8 pins (respectively power supply, reset, clock, data, ground and C4, C6, C8) which are in accordance with the ISO/IEC7816 protocol on the security chip to the strip; the contactless smart card connects two antenna pins of the security chip which conform to the ISO/IEC14443 protocol to the antenna; the double-interface smart card leads out the two types of pins, wherein the total number of the pins is 10.

With the function of the smart card being rich, the smart card is no longer a single chip device, for example, the smart card further combines the functions of display, fingerprint, etc., and accordingly, the display driving chip, the fingerprint processing chip, etc. are added, and the design of the structure is particularly needed to be considered from the aspect of processing cost. Besides, the multi-chip communication also adds a plurality of communication interfaces such as SPI, I2C, UART and the like, and is connected with the display and fingerprint function modules. Therefore, a corresponding communication interface needs to be expanded on the smart card carrier tape.

Disclosure of Invention

The invention provides a smart card fingerprint module and a carrier tape packaging form thereof, wherein a double-sided printed circuit board is used as a strip, a security chip, a fingerprint processing chip, a power supply processing chip, a resistor, a capacitor and 8 contacts which accord with ISO/IEC7816 are combined and packaged into a single module, and a bonding pad connected with an external circuit is led out of the module. The modules are arranged in two groups in the longitudinal direction, and the two sides of the modules are provided with the tooth holes for positioning to form the carrier band.

The contact surface of the strip is designed to be in an 8-pad structure in accordance with ISO/IEC7816 specifications for contact communication. And 8 contacts are connected to the cover sheet through vias of the printed circuit board.

The method comprises the following steps that a printed circuit is designed according to the electrical connection relation of components of a fingerprint module, namely a safety chip, a fingerprint processing chip, a power supply chip, a resistor and a capacitor, the components are welded on the printed circuit, the safety chip is connected with the fingerprint processing chip, the fingerprint processing chip collects and processes fingerprint images, processed fingerprint data are transmitted to the safety chip to be stored, and the safety chip realizes the storage of the fingerprint data and the fingerprint comparison; the envelope cover of strip still sets up the pad that fingerprint processing chip and the outside fingerprint of module gather the chip and link to each other, and these pads setting and envelope cover are all around. The power management chip takes the output of the safety chip as the input, the output power supply supplies power for the fingerprint processing chip, and meanwhile, the pad supplies energy for the fingerprint acquisition chip outside the module.

The packaging cover also comprises a welding disc which is used for non-contact communication and is connected with an external antenna; a pad for communicating with the fingerprint sensor chip; a signal pad indicating a module status; and the bonding pads are used for testing the fingerprint processing chip and downloading programs.

The components and parts on the fingerprint module package cover include security chip, fingerprint processing chip, power chip, resistance, electric capacity. The layout is concentrated on the middle part as much as possible, and after welding is completed, encapsulating glue is filled, so that the stability of the device is ensured.

The invention fully considers the processing requirements of the traditional smart card, arranges the fingerprint modules into the same positions as the standard smart card modules to form strips, and arranges the toothed holes at the two sides of the strips for module positioning during production and processing, so that the product can be processed more efficiently and produced in a large scale.

Drawings

Fig. 1 is a schematic diagram of a fingerprint module carrier tape.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Fig. 1 shows a schematic diagram of a fingerprint module, which includes a contact surface (100) and an envelope surface (200), and two fingerprint modules are placed side by side and arranged in a plurality of rows, and are arranged in line with the strip of the existing smart card module to conform to the existing smart card processing flow, and the strip has positioning perforations (102) on both sides for facilitating module alignment processing during processing.

The module uses a printed circuit board as a strip, the contact surface (100) of which is designed to conform to 8 contacts (101) of the ISO/IEC7816 protocol, including three contacts of power, reset, clock, ground, data and C4, C6, C8. Designing a printed circuit on the packaging cover according to the size specification and the connection relation of the fingerprint module component, wherein a pin connected with the ISO/IEC7816 contact is connected with the contact surface through a through hole; pins connected with components outside the fingerprint module are arranged as bonding pads on the periphery of the packaging surface.

A plurality of components and parts (201) are placed on the wrapping cover (200) of the module, including a security chip, a fingerprint processing chip, a power supply chip, a resistor and a capacitor, the connection relation of the components and parts is realized by a printing circuit, the components and parts (201) are placed at the position close to the center of the back face (200) as far as possible, and are sealed by wrapping glue, and the physical firmness of the components and parts is improved. Peripherally placing pads (202) connected to devices outside the module, including 2 pads for contactless communication, connected to an external antenna; 8 pads for communicating with the fingerprint sensor chip; 1 signal pad representing the module status; 3 pads for fingerprint processing chip testing and program downloading.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A smart card fingerprint module is characterized by comprising a strip and components on the strip, wherein the strip adopts a double-sided printed circuit board structure, one side of the double-sided printed circuit board is a contact surface, and 8 contacts conforming to an ISO7816 protocol are arranged on the contact surface; the other side of the double-sided printed circuit board is an encapsulating surface, a circuit and a bonding pad for connecting the components on the strip are arranged in the middle of the encapsulating surface according to the logical relation of the components, the components on the strip comprise a safety chip, a fingerprint processing chip, a power supply chip, a resistor and a capacitor, the components on the strip are arranged in the center of the strip and are sealed and fixed by encapsulating glue, and the bonding pad connected with the components except the intelligent card fingerprint module is led out from the periphery of the encapsulating surface.

2. The smart card fingerprint module of claim 1, wherein the components on the strip comprise a security chip, a fingerprint processing chip and a power chip, wherein a contact interface of the security chip is connected with a contact conforming to the ISO/IEC7816 specification on the contact surface; the security chip is connected with the fingerprint processing chip, the fingerprint processing chip collects and processes fingerprint images, processed fingerprint data are transmitted to the security chip to be stored, and the security chip realizes the storage of the fingerprint data and the fingerprint comparison; the power chip is connected with the safety chip, the output of the safety chip is used as the input of the power chip, the output power of the power chip supplies power for the fingerprint processing chip, and meanwhile, energy is provided for the fingerprint acquisition chip outside the fingerprint module of the smart card through the bonding pad.

3. The smart card fingerprint module of claim 1, wherein the periphery of the cover surface is provided with 8 pads for communication with the fingerprint sensor chip, 2 pads for non-contact communication and antenna connection, 1 signal pad for indicating the state of the smart card fingerprint module, and 3 pads for testing and program downloading of the fingerprint processing chip.

4. The smart card fingerprint module of claim 1, wherein the total thickness of the sealing glue sealing, fixing and sealing is not more than 0.6mm

5. A carrier tape, characterized in that, the smart card fingerprint modules as claimed in claims 1 to 4 are arranged in a standard smart card carrier tape manner, a disk type tape structure is adopted, every two modules are longitudinally arranged in a group, the number of the groups is not limited, and the edge of the carrier tape is provided with a perforation for processing and positioning.