Electrical connection terminal and electronic device

Abstract

The utility model provides an electric connection terminal which is provided with a connection part, the connection part is provided with an open hole, an aluminum plug is inserted into the open hole, the aluminum plug is a cutting body formed by cutting an aluminum wire, the cutting body is provided with a cutting surface, and the cutting surface is exposed through a hole opening of the open hole to be used for being connected with a lead. An electronic device having such an electrical connection terminal is also disclosed. The present disclosure provides an electrical connection with high quality and high reliability.

Description

Technical Field

[0001] This disclosure relates to an electrical connection terminal and an electronic device including such an electrical connection terminal. Background Technology

[0002] In microelectromechanical systems (MEMS), aluminum wire bonding is used to connect electronic modules to external electrical terminals. These external electrical terminals are typically plated with a nickel-phosphorus alloy as the electrical contacts. However, these contacts have strict requirements regarding phosphorus content, and precise control of phosphorus content during manufacturing is difficult, potentially leading to poor quality and low reliability of the electrical connections. Furthermore, nickel-phosphorus alloy contacts also exhibit poor connection quality and reliability when bonded to aluminum wires. Additionally, nickel-phosphorus alloy contacts are expensive to manufacture. Utility Model Content

[0003] One object of this disclosure is to provide an electrical connection terminal with high connection quality and reliability. Another object of this disclosure is to provide an electronic device having such an electrical connection terminal.

[0004] According to one aspect of this disclosure, an electrical connection terminal is provided, the electrical connection terminal having a connection portion. The connection portion has an opening. An aluminum plug is inserted into the opening. The aluminum plug is a cut body formed by cutting aluminum wire, the cut body having a cut surface. The cut surface is exposed through the opening for connection with a lead wire.

[0005] In one configuration, the cutting body is inserted into the opening by stamping.

[0006] In one configuration, the cutting surface is flush with the surface of the connecting portion.

[0007] In one configuration, the opening of the aperture has an expansion portion, the diameter of which gradually increases in the direction from the inside of the aperture toward the outside of the aperture, and the shape of the cutting body at the opening of the aperture matches the shape of the expansion portion.

[0008] In one configuration, the opening is a through hole, the orifice of the through hole includes a first orifice and a second orifice located on the opposite side relative to the first orifice, and the cutting surface includes a first cutting surface exposed through the first orifice and a second cutting surface exposed through the second orifice.

[0009] In one configuration, the diameter of the opening is 1.0 mm to 1.7 mm.

[0010] According to another aspect of this disclosure, an electronic device is provided, the electronic device including an electronic module assembly and at least one electrical connection terminal as described above. The terminals of the electronic module assembly are bonded to aluminum plugs of the corresponding electrical connection terminals via aluminum wire bonding.

[0011] In one configuration, the aluminum wire is bonded to the aluminum plug by ultrasonic welding.

[0012] In one configuration, the electronic device is a pressure sensor, which includes a housing molded together with the electrical connection terminals.

[0013] Using the electrical connection terminals of this disclosure, a high-quality and reliable electrical connection can be obtained between the electrical connection terminals and the electronic module components of an electronic device. Furthermore, because the electrical connection terminals of this disclosure use a cut body with a cut surface as an aluminum plug and make the cut surface the part for connection with the lead wire, the cleanliness of the bonding surface can be ensured, thereby improving the quality and reliability of the connection. Attached Figure Description

[0014] The various objectives, features, and advantages of this disclosure will become more apparent from the following description of preferred embodiments of the disclosure, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the present disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts.

[0015] Figure 1 This is a schematic diagram of the electrical connection terminals according to this disclosure.

[0016] Figure 2 This is a partial cross-sectional view schematically showing the through hole of the connection portion of the electrical connection terminal according to the present disclosure.

[0017] Figure 3 This is a schematic partial cross-sectional view of a through hole in the connection portion of an electrical connection terminal according to the present disclosure, wherein the orifice of the through hole has an expansion portion.

[0018] Figure 4 This is a schematic view showing a cut body formed by cutting aluminum wire.

[0019] Figure 5 This is a schematic diagram showing the cutting body being inserted into the through hole.

[0020] Figure 6 This is a schematic diagram showing the cutting body being inserted into the through hole and the cutting surface being flush with the surface of the connection portion of the electrical connection terminal.

[0021] Figure 7 This is a schematic diagram of an electronic device having electrical connection terminals according to the present disclosure. Detailed Implementation

[0022] The present disclosure will now be described with reference to the accompanying drawings, which illustrate embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure more complete and to fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.

[0023] It should be understood that the same reference numerals denote the same elements in all the accompanying drawings. For clarity, the dimensions of certain features may be modified in the drawings.

[0024] Unless otherwise stated, the terminology used herein (including technical and scientific terms) should have the meaning that would be normally understood by one of ordinary skill in the art to which this disclosure pertains. Unless otherwise stated, the terms “comprising,” “including,” “having,” and similar terms as used in the specification and claims should be interpreted in an open-ended sense, that is, “comprising,” “including,” and “having” should be interpreted as synonymous with the terms “at least comprising,” “at least containing,” and “at least having.”

[0025] Unless otherwise stated, the directional terms “upper,” “lower,” “top,” “bottom,” etc., used in this disclosure refer to the relative orientation of the pressure sensor assembly in the state shown in the accompanying drawings.

[0026] The ordinal words “first”, “second”, etc., used in this disclosure are merely for distinguishing terms and do not impose any restrictions on the order, importance, or compositional differences of the features being modified.

[0027] It should be understood that the terminology used in this specification is for describing specific embodiments only and is not intended to limit this disclosure. For the sake of brevity and / or clarity, well-known functions or structures may not be described in detail.

[0028] Figure 1 A schematic diagram of an example of an electrical connection terminal 100 according to this disclosure is shown. Figure 1Three electrical connection terminals are shown, but the number of electrical connection terminals is not limited to this; one, two, or more than three electrical connection terminals can be provided as needed. The material of the electrical connection terminal 100 can be any suitable conductive material such as copper, copper alloy, aluminum, or tin alloy. The electrical connection terminal 100 may have a connection portion 101. The connection portion 101 may be located at one end of the electrical connection terminal 100. The connection portion 101 can be configured for connection to an electronic module assembly (e.g., EMA) of an electronic device. The electrical connection terminal may also have a connection end 102 located at the other end of the electrical connection terminal 100. The connection end 102 can be used for connection to an external device.

[0029] The connection portion 101 may be a solder pad. The connection portion 101 may have an opening 103, such as... Figures 1 to 3 As shown. The opening 103 can be formed by stamping. Figure 2 and Figure 3 As shown, the opening 103 can be a through hole. Of course, the opening 103 can also be a non-through hole. The opening 103 has an opening. When the opening 103 is a through hole, such as... Figure 2 As shown, the through hole includes a first opening 1031 and a second opening 1032 located on the opposite side of the first opening 1031. That is, the first opening 1031 is located on one surface side of the connecting portion 101, and the second opening 1032 is located on the other surface side of the connecting portion 101.

[0030] like Figure 1 and Figure 6 As shown, an aluminum plug 104 is inserted into the opening 103. Figure 4 As schematically shown, the aluminum plug 104 can be cut from aluminum wire 105 ( Figure 4The dashed line schematically illustrates the cut body 106 (cut by cutting). The cut body 106 has a cutting surface. The cutting surface is the part of the aluminum wire 105 that is cut. In one example, the cut body 106 has one cutting surface, that is, one of the upper or lower surfaces of the cut aluminum wire cut body is the cutting surface. In another example, both the upper and lower surfaces of the cut aluminum wire cut body can be cutting surfaces, that is, the cut body 106 has a first cutting surface 1061 and a second cutting surface 1062. When the cut body 106 is inserted into the opening 103, the cutting surfaces (e.g., the first cutting surface 1061 and the second cutting surface 1062) are exposed through the openings of the opening 103 (e.g., the first opening 1031 and the second opening 1032). Thus, in the manufactured electrical connection terminal 100, the cutting surface of the aluminum plug 104 inserted into the opening 103 of the connection portion 101 can be used for connection with a lead such as an aluminum wire, for example, a bonding connection. Therefore, without the need for nickel-phosphorus alloy plating processes or precise control of element content in the alloy, electrical connection terminals suitable for bonding with aluminum wires (e.g., aluminum wires with a wire width of 10 mils) can be manufactured through a simple process and at a lower cost. Since aluminum-aluminum bonding is achieved using an aluminum plug and aluminum wire, electrical connection terminals with high connection quality and reliability can be obtained. Furthermore, this disclosure innovatively uses a cut-surface material as the aluminum plug and the cut surface as the bonding surface with the aluminum wire. Because the cut surface is a fresh and clean surface newly formed after cutting, the bonding surface of the electrical connection terminal according to this disclosure will be a fresh and clean surface without contamination. Since the connection quality and reliability of the electrical connection terminal are highly sensitive to the cleanliness of the bonding surface, using a cut surface as the bonding surface greatly improves the connection quality and reliability of the electrical connection terminal. In addition, using a cut-surface material cut from aluminum wire as the aluminum plug also greatly improves material utilization.

[0031] In one configuration, the cut-out cut piece 106 is inserted into the opening 103 by stamping, such as... Figure 5 As shown. In one construction, such as Figure 6 As shown, the cutting surfaces (e.g., the first cutting surface 1061 and the second cutting surface 1062) are flush with the surface of the connecting portion 101. That is, the first cutting surface 1061 is flush with the upper surface of the connecting portion 101, and the second cutting surface 1062 is flush with the lower surface of the connecting portion 101. This can be achieved by further stamping both ends of the cut body 106. The flush, flat surfaces better meet the requirements for wire bonding.

[0032] In one configuration, the opening 103 has an expansion portion at its opening, the diameter of which gradually increases in the direction from the inside of the opening toward the outside. For example, when the opening 103 is a through hole, such as... Figure 3 and Figure 6 As shown, the through hole has a first expansion portion 1033 and a second expansion portion 1034 at the first opening 1031 and the second opening 1032, respectively. The diameters of the first expansion portion 1033 and the second expansion portion 1034 are in the direction from the inside of the through hole to the outside of the through hole (i.e., respectively at... Figure 3 and Figure 6 The shape of the aluminum plug 104 at the opening of the aperture 103 matches the shape of the expansion portion. For example, as Figure 6 As shown, the shape of the aluminum plug 104 at the first opening 1031 and the second opening 1032 of the opening 103 matches the shape of the first expansion portion 1033 and the second expansion portion 1034, respectively. Furthermore, as described above, the cutting surface can be flush with the surface of the connecting portion 101. This can be achieved by further stamping both ends of the cutting body 106. The corresponding shapes of the expansion portions and the aluminum plug increase the stability of the aluminum plug in the opening 103 and reduce the risk of the aluminum plug moving or falling out of the opening.

[0033] In one configuration, the diameter of the opening 103 can be from 1.0 mm to 1.7 mm. Optionally, the diameter of the opening can be, for example, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, or 1.7 mm. The diameter of the opening 103 can also be other suitable values. The diameter of the aluminum wire 105 can be slightly smaller than the diameter of the opening 103. In one configuration, the diameter of the aluminum wire 105 can be from 0.8 mm to 1.5 mm. Optionally, the diameter of the aluminum wire 105 can be, for example, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm. The diameter of the aluminum wire 105 can also be other suitable values. When a cut body 106, cut from an aluminum wire 105 having the above diameter, is stamped into the opening 103 and further stamped so that its cut surface is flush with the surface of the connecting portion 101, the cut body 106 will fill the opening 103 and form an aluminum plug 104 due to the ductility of aluminum. With the aforementioned dimensions, the electrical connection terminal 100 according to this disclosure can be adapted to bond with, for example, aluminum wire with a linewidth of 10 mils, thereby being suitable for use as an electrical connection terminal for electrical connection to electronic devices, such as, but not limited to, microelectromechanical systems (MEMS) devices.

[0034] In another aspect, this disclosure also provides an electronic device including the electrical connection terminals described in this disclosure. The electronic device may be a microelectromechanical system (MEMS) device. As an example, the electronic device may be as follows: Figure 7 The pressure sensor shown is an example. However, those skilled in the art will understand that the electronic device is not limited to this and can be any electronic device.

[0035] like Figure 7 As shown, the electronic device 200, serving as a pressure sensor, may include a housing 204, an electronic module assembly 201, and at least one electrical connection terminal 100 according to this disclosure. In one configuration, the electrical connection terminal 100 may be molded together with the housing as a housing terminal. The electronic module assembly has at least one terminal 202. Figure 7 In the example shown, the number of electrical connection terminals 100 and the terminals of the electronic module assembly is three, but this disclosure is not limited thereto; the number can be any suitable value, such as one, two, or more than three. The terminals 202 of the electronic module assembly can be bonded to the aluminum plugs 104 of the corresponding electrical connection terminals 100 via aluminum wires 203. In one configuration, the aluminum wires 203 can be bonded to the aluminum plugs and / or to the terminals 202 of the electronic module assembly via ultrasonic welding or any other suitable method. With the above structure, for the reasons stated above, a high-quality and highly reliable electrical connection can be obtained between the electronic module assembly and the electrical connection terminals.

[0036] Although this disclosure has been described with reference to exemplary embodiments, those skilled in the art will understand that various modifications and variations can be made to the exemplary embodiments of this disclosure without departing from the spirit and scope thereof. Therefore, all modifications and variations are included within the scope of protection of this disclosure as defined by the appended claims. The scope of protection of this disclosure is defined by the appended claims, and equivalents of those claims are also included.

Claims

1. An electrical connection terminal, the electrical connection terminal having a connection portion, characterized in that, The connecting portion has an opening into which an aluminum plug is inserted. The aluminum plug is a cut body made of aluminum wire, and the cut body has a cut surface that is exposed through the opening for connection with a lead wire.

2. The electrical connection terminal according to claim 1, characterized in that, The cutting element is inserted into the opening by stamping.

3. The electrical connection terminal according to claim 2, characterized in that, The cut surface is flush with the surface of the connecting portion.

4. The electrical connection terminal according to claim 3, characterized in that, The opening of the hole has an expansion portion, the diameter of which gradually increases from the inside of the opening toward the outside of the opening, and the shape of the cutting body at the opening of the hole matches the shape of the expansion portion.

5. The electrical connection terminal according to any one of claims 1 to 4, characterized in that, The opening is a through hole, and the opening of the through hole includes a first opening and a second opening located on the opposite side of the first opening. The cutting surface includes a first cutting surface exposed through the first opening and a second cutting surface exposed through the second opening.

6. The electrical connection terminal according to any one of claims 1 to 4, characterized in that, The diameter of the opening is 1.0 mm to 1.7 mm.

7. An electronic device, characterized in that, The electronic device includes an electronic module assembly and at least one electrical connection terminal according to any one of claims 1-6, wherein the terminals of the electronic module assembly are bonded to the aluminum plugs of the respective electrical connection terminals by aluminum wire bonding.

8. The electronic device according to claim 7, characterized in that, The aluminum wire is bonded to the aluminum plug by ultrasonic welding.

9. The electronic device according to claim 7 or 8, characterized in that, The electronic device is a pressure sensor, which includes a housing molded together with the electrical connection terminal.

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