Vertical conductive adhesive

Abstract

The utility model discloses a vertical conductive adhesive, which comprises a metal elastic piece, an elastic insulator and an insulating plate, the metal elastic piece is connected with the insulating plate in an inserting manner; the elastic insulator is arranged between the metal elastic piece and the insulating plate, the metal elastic piece is coated with the elastic insulator, and the two ends of the metal elastic piece extend out of the surface of the elastic insulator; the insulating plate is used for supporting and positioning the metal elastic piece and the elastic insulator; the metal elastic piece comprises a plurality of single elastic pieces which are separated and insulated from one another. And the two ends of the single elastic sheet protrude out of the surface of the elastic insulator by 5-50 microns. The cross section of the single elastic sheet is in any one of an arch shape, a continuous bending shape and a continuous bending shape. The upper end and the lower end of each single elastic piece are straight plate sections or connecting blocks.

Description

Technical Field

[0001] This application relates to the field of electronic component and device technology, specifically a vertical conductive adhesive. Background Technology

[0002] With the development of high-density and high-integration electronic components such as chips and circuit boards, the electrical signal pins of components are becoming smaller and smaller. Traditional spring pins or spring contacts are encountering bottlenecks or high cost pressures in the fields of testing and signal connection. Traditional conductive components in this field cannot well meet the requirements of ensuring high-density arrangement of electrical signal pins of corresponding high-density components and ensuring structural stability under the premise of small size. Utility Model Content

[0003] This invention addresses the above-mentioned problems by proposing a vertical conductive adhesive, aiming to solve the technical issues in the background art.

[0004] To achieve the above objectives, this utility model provides a vertical conductive adhesive, comprising a metal elastic element, an elastic insulator, and an insulating plate; the metal elastic element is plugged into and connected to the insulating plate; the elastic insulator is disposed between the metal elastic element and the insulating plate, and the elastic insulator covers the metal elastic element, with both ends of the metal elastic element extending beyond the surface of the elastic insulator; the insulating plate is used to support and position the metal elastic element and the elastic insulator; the metal elastic element includes multiple individually insulating spring pieces separated from each other.

[0005] Furthermore, the two ends of the single-piece spring protrude 5-50 μm from the surface of the elastic insulator.

[0006] Furthermore, the cross-section of the single-piece spring sheet can be any one of the following: arc-shaped, continuously curved, or continuously bent.

[0007] Furthermore, the upper and lower ends of the single-piece spring sheet are straight plate sections or connecting blocks.

[0008] Furthermore, the elastic insulator material is any one of silicone, elastic PU, or elastic epoxy resin.

[0009] Furthermore, the base material of the metal elastic element is any one of copper, gold, silver, high carbon steel, or beryllium copper.

[0010] Furthermore, the surface of the metal elastic element is electroplated with any one of gold, silver, or platinum.

[0011] Compared with existing technologies, the vertical conductive adhesive provided by this invention fills the gap between two adjacent individual spring pieces with insulating elastic adhesive, thus isolating and positioning the individual spring pieces to prevent electrical connections. Simultaneously, the individual spring pieces also receive elastic support, strengthening their structural strength and enhancing their elasticity. This prevents repeated compression and decompression during use, thus avoiding metal fatigue and extending the service life of the vertical conductive adhesive. Even with small gaps between adjacent spring pieces, the vertical conductive adhesive maintains good stability despite its small overall size, ensuring a high-density arrangement of the spring pieces and accurate distribution of electrical signal pins for electronic components. When the vertical conductive adhesive contacts conductive points on both sides, the individual spring pieces extending from the upper and lower ends of the insulating elastic adhesive form a vertical conductive path. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the cross-sectional structure of a single elastic piece of a vertical conductive adhesive according to this application.

[0013] Figure 2 This is a schematic cross-sectional view of another embodiment of a vertical conductive adhesive single-piece spring sheet according to this application.

[0014] Figure 3 This is a schematic cross-sectional view of another embodiment of a vertical conductive adhesive single-piece spring sheet according to this application.

[0015] Figure 4 This is a schematic cross-sectional view of another embodiment of a vertical conductive adhesive single-piece spring sheet according to this application.

[0016] Figure 5 This is a schematic diagram of the connection structure between the slot plate and the insulating plate of a vertical conductive adhesive according to this application.

[0017] Figure 6 This is a schematic diagram of the metal elastic substrate structure of a vertical conductive adhesive according to this application.

[0018] Figure 7 This is a schematic diagram of the structure of a vertical conductive adhesive according to this application.

[0019] The reference numerals in the figure are as follows: 1. Slot plate; 110. Slot; 2. Insulating plate; 210. Positioning hole; 3. Metal elastic component base; 310. Single spring piece; 320. Slot; 4. Insulating elastic adhesive. Detailed Implementation

[0020] Please refer to Figure 1 - Figure 7 The method for manufacturing this vertical conductive adhesive includes the following steps:

[0021] S100: Fabricate a metal elastic component substrate by using a subtractive processing technique to fabricate an elastic metal sheet into a metal elastic component substrate with multiple individual elastic pieces 310. The metal elastic component substrate is a structure connecting the upper and lower ends of the elastic metal sheet, and there is a separation gap between two adjacent individual elastic pieces created by the subtractive processing technique.

[0022] S200: Fabricate a slot plate 1, wherein the slot plate is provided with a slot 110 corresponding to the metal elastic element substrate;

[0023] S300: Fabricate an insulating board, wherein the insulating board is connected to the bottom surface of the slot plate;

[0024] S400: Fill with liquid insulating elastic adhesive, inject the liquid insulating elastic adhesive into the slot, and fill the gap and the space between the inner surface of the metal elastic component substrate and the insulating plate;

[0025] S500: After the liquid insulating elastic adhesive solidifies, the two ends of the metal elastic component substrate that are connected at the top and bottom are processed to separate each of the individual elastic pieces, and the connection is released to obtain the metal elastic component.

[0026] S600: After the metal elastic element is manufactured, the slot plate is removed.

[0027] It is worth noting that the execution order of steps S100, S200, and S300 is not restricted. Before performing step S400 to fill the liquid insulating elastic adhesive, the metal elastic component substrate is first inserted into the slot. The slot is a slot 320 structure with corresponding multi-piece metal springs. The multi-piece metal springs are also known as metal elastic component substrates with multiple individual springs.

[0028] In step S500, since the metal elastic component substrate is positioned by the slot, and the solidified liquid insulating elastic adhesive 4 fills the substrate, with the insulating plate serving as the bottom support, the metal elastic component substrate is processed to separate each individual elastic piece. This process, which involves processing the two ends of the metal elastic component substrate that are connected vertically, produces the metal elastic component. Compared to directly fabricating the elastic metal sheet into multiple unconnected individual elastic pieces and then arranging them with the insulating elastic adhesive and insulating plate, this method has lower processing difficulty, higher yield, and higher processing efficiency. Thanks to the support of the insulating elastic adhesive, the metal elastic component substrate is prevented from being suspended without support and shifting when separating each individual elastic piece.

[0029] Thanks to the method of creating only the dividing gaps, rather than completely dividing the liquid into individual, unconnected elastic pieces, the individual elastic pieces will not move due to flow, shrinkage, or polymerization before or after the liquid insulating elastic adhesive solidifies. This ensures precise arrangement.

[0030] After step S600, the upper and lower ends of each individual spring piece in the original blocking metal elastic component are exposed, respectively connecting to the corresponding electrical contacts or pins of two devices requiring conductivity. Since the gaps between two adjacent individual spring pieces are filled with insulating elastic adhesive, the individual spring pieces are separated and insulated from each other, preventing electrical connections. Simultaneously, the individual spring pieces also gain elastic support, strengthening their structural strength and enhancing their elasticity. This prevents repeated compression and decompression during use, thus avoiding metal fatigue and extending the service life of the vertical conductive adhesive.

[0031] The vertical conductive adhesive produced by this processing method exhibits excellent stability even with a small overall size, ensuring a high-density arrangement of individual spring contacts and accurate distribution of electrical signal pins for corresponding electronic components. When the vertical conductive adhesive comes into contact with conductive points on both sides, a vertical conductive path can be formed by the individual spring contacts extending from the upper and lower ends of the insulating elastic adhesive.

[0032] After the liquid insulating elastic adhesive solidifies, it becomes an elastic insulator or insulating elastic adhesive.

[0033] Furthermore, it also includes a first detection and processing step: after the metal elastic element is produced, if the insulating elastic adhesive is not exposed at the upper and lower ends of the single elastic piece, the insulating elastic adhesive is repaired so that the insulating elastic adhesive is exposed at the upper and lower ends of the single elastic piece.

[0034] In some cases, in order to ensure the smooth progress of step S500, or to facilitate the insertion of the metal elastic component into the slot, the slot design of the slot plate does not cover the upper and lower ends of the individual spring piece. Therefore, the insulating elastic adhesive will still cover the upper and lower ends of the individual spring piece, and the insulating elastic adhesive needs to be repaired in a certain way through the first detection and processing step.

[0035] Furthermore, it also includes a second detection and processing step: after the metal elastic element is produced, the surface electroplating layer of the single elastic piece is detected, and if the surface electroplating layer is damaged, the damaged area is re-electroplated.

[0036] During step S500, there is a certain probability that the surface electroplating layer of the individual spring sheet will be damaged, affecting its conductivity or corrosion resistance. Therefore, the second detection and processing step is used to repair and improve the quality of the vertical conductive adhesive manufactured by this method.

[0037] Furthermore, the subtractive processing technology is a chemical etching process or a laser cutting process.

[0038] Compared to machining, these two processes can produce smaller gaps, enabling high-density arrangement of individual spring contacts and smaller overall size of the vertical conductive adhesive, thus facilitating the electrical connection and signal transmission of highly integrated components.

[0039] Furthermore, before fabricating the metal elastic substrate, the process includes an electroplating step of gold or platinum onto the surface of the elastic metal sheet.

[0040] By electroplating a gold or platinum layer onto the surface of the elastic metal sheet, the substrate of the elastic metal sheet can be made of a metal material with good elasticity, and it is not necessary to use gold or platinum for the entire elastic metal sheet, thus saving costs. This also improves the conductivity and corrosion resistance of the individual elastic sheet.

[0041] Furthermore, in the step of manufacturing the insulating board, the insulating board material is provided with receiving openings for accommodating the slot plate.

[0042] By accommodating the opening, the slot plate and the insulating plate can be precisely aligned, and the slot plate can be prevented from shifting.

[0043] In some embodiments, the insulating board material itself is provided with positioning holes 210. Through the positioning holes, the insulating board 2 is positioned and fixed on the corresponding processing platform, and other components that are connected or indirectly connected to the insulating board are also positioned, thereby improving processing accuracy.

[0044] Furthermore, after the liquid insulating elastic adhesive solidifies, the slot plate and insulating plate at the upper and lower ends of the single elastic piece are removed by grinding, and the connection position of the multi-piece metal elastic element substrate is removed. In this way, the single elastic pieces are insulated from each other and connected vertically. After the metal elastic element is obtained, the insulating silicone at the upper and lower ends of the single elastic piece is removed by laser scanning, so that the upper and lower ends of the single elastic piece protrude from the surface of the insulating silicone.

[0045] Because the processed vertical conductive colloid is small in size, conventional machining methods with large amplitude and feed rate cannot be used to grind and remove the slot plate and insulating plate at the upper and lower ends of the single-piece spring sheet. A grinding process allows for the precise and appropriate removal of certain parts of the slot plate and insulating plate.

[0046] The insulating silicone in the upper and lower ends of the single-piece spring sheet is removed by laser scanning. This method has high processing precision and high efficiency, and is a fine processing method.

[0047] This application provides a vertical conductive adhesive, which is prepared by the aforementioned method for preparing vertical conductive adhesive.

[0048] Please refer to Figure 1 - Figure 7The cross-section of the elastic metal sheet is any one of an arc shape, a continuously curved shape, or a continuously bent shape; the upper and lower ends of the elastic metal sheet are straight sections or connecting blocks; the liquid insulating elastic adhesive is any one of silicone, elastic PU, or elastic epoxy resin; the base material of the elastic metal sheet is any one of copper, gold, silver, high carbon steel, or beryllium copper; the plating material of the elastic metal sheet is any one of gold, silver, or platinum.

[0049] The upper and lower ends of the single elastic piece in the metal elastic element protrude 5-50 μm from the surface of the insulating elastic adhesive.

[0050] Bow-shaped, continuously curved, and continuously bent shapes are all good structures for supporting elastic deformation and recovery. Other structures that provide good support for elastic deformation and recovery can also be used for the cross-section of the elastic metal sheet.

[0051] When the upper and lower ends of the elastic metal sheet are straight sections, they can abut against the contacts on the component. When the upper and lower ends of the elastic metal sheet are connecting blocks, they can abut against the pins on the component.

[0052] By using gold or silver as the coating material on the surface of the elastic metal sheet substrate, the conductivity can be increased. Alternatively, other alloy materials can be used to increase both wear resistance and conductivity.

[0053] In summary, this invention provides a universal vertical conductive adhesive solution for testing or signal connection, which has the advantages of high versatility, low cost and high density, and can meet the needs of high-frequency signal transmission.

[0054] To facilitate intuitive observation of the finished structure of the vertical conductive adhesive product. Figure 7 The distance between the individual spring contacts shown in the image is a magnified microscopic view and is for illustrative purposes only. In actual products using vertical conductive adhesive, the distance between the individual spring contacts is much smaller.

Claims

1. A vertically conductive adhesive, characterized in that, It includes a metal elastic element, an elastic insulator, and an insulating plate; the metal elastic element is plugged into and connected to the insulating plate; the elastic insulator is disposed between the metal elastic element and the insulating plate, and the elastic insulator covers the metal elastic element, with both ends of the metal elastic element extending beyond the surface of the elastic insulator; the insulating plate is used to support and position the metal elastic element and the elastic insulator; the metal elastic element includes multiple individually insulating spring pieces separated from each other.

2. The vertical conductive adhesive according to claim 1, characterized in that, The two ends of the single-piece spring protrude 5-50 μm from the surface of the elastic insulator.

3. The vertical conductive adhesive according to claim 1, characterized in that, The cross-section of the single-piece spring sheet can be any one of the following: bow-shaped, continuously curved, or continuously bent.

4. The vertical conductive adhesive according to claim 1, characterized in that, The upper and lower ends of the single-piece spring sheet are straight plate sections or connecting blocks.

5. The vertical conductive adhesive according to claim 1, characterized in that, The elastic insulator is made of any one of silicone, elastic PU, or elastic epoxy resin.

6. The vertical conductive adhesive according to claim 1, characterized in that, The base material of the metal elastic element is any one of copper, gold, silver, high carbon steel, or beryllium copper.

7. The vertical conductive adhesive according to claim 1, characterized in that, The surface of the metal elastic element is electroplated with any one of gold, silver, or platinum.

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