CN210576587U - A kind of electroplating layer for terminal surface, terminal and electronic interface - Google Patents

Abstract

The utility model relates to an electroplate technical field, indicate a plating layer and terminal, electronic interface for terminal surface especially, the plating layer is including electroplating in proper order in the corrosion-resistant combined layer and the wear-resisting combined layer on terminal surface, and the wear-resisting combined layer is including the palladium plating layer, first gold plating layer and the rhodium ruthenium plating layer of electroplating in proper order, and palladium plating layer surface area is less than corrosion-resistant combined layer surface area, and the surface of terminal is electroplated the aforesaid the plating layer, electronic interface then has the aforesaid including electroplating the terminal of plating layer. The utility model provides a palladium plating layer, rhodium ruthenium layer play wear-resisting effect, and first gold plating layer plays the transitional action, and palladium plating layer adopts the local electroplating mode to electroplate, and the electroplating area of palladium plating layer is less than corrosion-resistant combined layer surface area, has practiced thrift the cost greatly.

Description

A kind of electroplating layer for terminal surface, terminal and electronic interface

technical field

The utility model relates to the technical field of electroplating, in particular to an electroplating layer used on the surface of a terminal, a terminal and an electronic interface.

Background technique

With the popularization of electronic products, the application of electronic products is becoming more and more extensive. During the use of electronic products, electronic interfaces are often plugged and unplugged. For electronic interfaces with high plugging and unplugging frequencies, their wear and tear is relatively large, and the places of wear are easy to wear. It is oxidized and corroded, and poor electrical contact often occurs. In order to improve wear resistance and corrosion resistance, many terminals of electronic interfaces are currently electroplated with electroplating. In order to enhance the bonding between the electroplating layer and the base material, a transition layer is arranged between the electroplating layer and the base material, which can increase the adhesion. However, the existing transition layers are mostly made of gold, silver, gold alloy and other materials, resulting in high cost; and in order to achieve the effects of plug resistance, wear resistance, and corrosion resistance, thick precious metals (such as rhodium, rhodium, rhodium, etc.) have to be electroplated. Rhodium, ruthenium, palladium, etc.) are very expensive.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides an electroplating layer for the surface of the terminal, the terminal, and the electronic interface, and the cost is low.

In order to achieve the above purpose, the technical solution adopted by the present invention is to provide an electroplating layer for the surface of the terminal, which includes a corrosion-resistant composite layer and a wear-resistant composite layer that are sequentially electroplated on the terminal surface, and the wear-resistant composite layer includes sequentially electroplating. The palladium coating, the first gold coating, and the rhodium-ruthenium coating have a surface area smaller than that of the corrosion-resistant composite layer.

As a preferred solution, the surface area of the palladium plating layer is greater than half of the surface area of the corrosion-resistant composite layer.

As a preferred solution, the thickness of the palladium plating layer is 0.25-5 microns.

As a preferred solution, the thickness of the first gold plating layer is 0.025-0.75 microns.

As a preferred solution, the thickness of the rhodium-ruthenium coating is 0.015-3 microns.

As a preferred solution, it also includes a copper plating layer disposed between the corrosion-resistant composite layer and the terminal, and the thickness of the copper plating layer is 0.3-5 microns.

As a preferred solution, the corrosion-resistant composite layer includes a first nickel-tungsten coating, a second gold coating, a second nickel-tungsten coating and a third gold coating which are electroplated in sequence, and the surface area of the second gold coating is smaller than that of the first nickel-tungsten coating coating surface area.

As a preferred solution, the thickness of the first nickel-tungsten coating is 0.5-5 microns, the thickness of the second gold coating is 0.025-0.5 microns, the thickness of the second nickel-tungsten coating is 0.25-8 microns, The thickness of the third gold plating layer is 0.005-0.8 microns.

The utility model also provides a terminal, the surface of which is electroplated with the above-mentioned electroplating layer.

The utility model also provides an electronic interface, which includes the above-mentioned terminal.

The beneficial effects of the present utility model are:

The utility model is sequentially plated with a corrosion-resistant composite layer and a wear-resistant composite layer on the surface of the terminal. The above-mentioned composite coating structure has good wear resistance and corrosion resistance, and the adhesion between the electroplating layer and the base material is excellent. Better; the wear-resistant composite layer is mainly composed of palladium coating, first gold coating and rhodium-ruthenium coating. The hardness of palladium coating is relatively high, which can improve the hardness of the terminal, prevent it from bending and extending, and resist plugging and unplugging. Secondly, it has certain anti-corrosion properties. The rhodium-ruthenium coating can improve the electrical contact performance of the terminal, and its contact resistance is small; at the same time, it also has high hardness and good corrosion resistance, plug resistance and hand sweat resistance electrolysis; and the first gold coating as a As the transition layer, gold has good ductility, which can buffer or reduce the internal stress of the above two coatings and prevent cracks in the coating. So that the electroplating coating has better performance;

The most important thing is that the palladium plating layer is disposed on the surface of the previous plating layer (ie, the corrosion-resistant composite layer) by local electroplating. The plating area of the palladium plating layer is smaller than that of the corrosion-resistant composite layer, which effectively saves costs.

Description of drawings

Figure 1 is a schematic cross-sectional view of the present invention.

Description of reference numerals: 1-copper coating; 2-palladium coating; 3-first gold coating; 4-rhodium-ruthenium coating; 51-first nickel-tungsten coating; 52-second gold coating; 53-second nickel-tungsten coating ; 54 - The third gold coating.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, with a specific orientation. Therefore, it should not be construed as a limitation on the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection. Detachable connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Please refer to FIG. 1 , the present invention relates to an electroplating layer for the surface of a terminal, including a corrosion-resistant composite layer and a wear-resistant composite layer plated on the terminal surface in sequence, and the wear-resistant composite layer includes a palladium plating layer plated in sequence. 2. For the first gold plating layer 3 and the rhodium-ruthenium plating layer 4, the surface area of the palladium plating layer 2 is smaller than the surface area of the corrosion-resistant composite layer.

The utility model is sequentially plated with a corrosion-resistant composite layer and a wear-resistant composite layer on the surface of the terminal. The above-mentioned composite coating structure has good wear resistance and corrosion resistance, and the adhesion between the electroplating layer and the base material is excellent. Better; wherein the wear-resistant composite layer is mainly composed of palladium plating layer 2, first gold plating layer 3 and rhodium-ruthenium plating layer 4. The hardness of palladium plating layer 2 is relatively large, which can improve the hardness of the terminal, prevent it from bending and extending, and is resistant to plugging and unplugging. It has certain anti-corrosion and anti-oxidation properties; the rhodium-ruthenium plating layer 4 can improve the electrical contact performance of the terminal, and its contact resistance is small; at the same time, it also has high hardness and good corrosion resistance, plug resistance and hand sweat resistance electrolysis; and The first gold plating layer 3 is used as a transition layer, and gold has good ductility, which can buffer or reduce the internal stress of the above two kinds of plating layers and prevent cracks in the plating layers. So that the electroplating coating has better performance;

The most important thing is that the palladium plating layer is uniformly arranged on the surface of the previous plating layer (ie, the corrosion-resistant composite layer) by local electroplating, and the plating area of the palladium plating layer 2 is smaller than that of the corrosion-resistant composite layer, which effectively saves costs. Specifically, the surface area of the palladium plating layer 2 is greater than half of the surface area of the corrosion-resistant composite layer.

At present, in order to improve the electrical conductivity of electronic products, the substrate of the terminal is generally made of copper; a copper plating layer 1 is arranged between the corrosion-resistant composite layer and the terminal, and the copper plating layer 1 can be well combined with the substrate. Secondly, the surface of the substrate can be The defects (such as fine pits, etc.) are compensated, and the flatness is high, which is conducive to subsequent electroplating. In addition, the thickness of the copper plating layer 1 is 0.3-5 μm, the thickness of the palladium plating layer 2 is 0.25-5 μm, the thickness of the first gold plating layer 3 is 0.025-0.75 μm, and the thickness of the rhodium-ruthenium plating layer 4 is 0.015 to 3 microns.

The corrosion-resistant composite layer includes a first nickel-tungsten coating 51 , a second gold coating 52 , a second nickel-tungsten coating 53 and a third gold coating 54 . The surface area of the second gold coating 52 is smaller than that of the first nickel-tungsten coating 51 . By using double-layer nickel-tungsten coating, the thickness of the wear-resistant layer can be effectively reduced, and the cost can be reduced. At the same time, the nickel-tungsten coating has better wear resistance and corrosion resistance, especially acid resistance; and the second gold coating plays a transitional role. 52 and the third gold plating layer 54, on the one hand, prevent cracks in the plating layer, so that the electroplating layer has better performance; cost, and the surface area of the second gold plating layer 52 is larger than half of the surface area of the first nickel-tungsten plating layer 51 . Preferably, the thickness of the first nickel-tungsten plating layer 51 is 0.5-5 microns, the thickness of the second gold plating layer 52 is 0.025-0.5 microns, and the thickness of the second nickel-tungsten plating layer 53 is 0.25-8 microns, The thickness of the third gold plating layer 54 is 0.005-0.8 microns.

The palladium plating layer 2 and the second gold plating layer 52 are electroplated by local electroplating. Due to the local electroplating, there will be an unplated area on the surface of the upper layer of the plating layer. After local electroplating, the next plating layer will be plated. The unplated area is automatically filled, and the local electroplating coating can also be uniformly electroplated by other local electroplating methods such as dots, linear stripes, twill, etc., which will not be repeated here.

The above embodiments are only to describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. On the premise of not departing from the design spirit of the present invention, ordinary engineers and technicians in the art make the technical solutions of the present invention. Various deformations and improvements should fall within the protection scope determined by the claims of the present utility model.

Claims (10)

1. The utility model provides an electroplating layer for terminal surface, is including electroplating in terminal surface's corrosion-resistant combined layer and wear-resisting combined layer in proper order, its characterized in that: the wear-resistant combined layer comprises a palladium plating layer, a first gold plating layer and a rhodium ruthenium plating layer which are electroplated in sequence, and the surface area of the palladium plating layer is smaller than that of the corrosion-resistant combined layer.

2. A plating layer for a terminal surface according to claim 1, wherein: the surface area of the palladium plating layer is larger than the area of one half of the surface of the corrosion-resistant combination layer.

3. A plating layer for a terminal surface according to claim 1, wherein: the thickness of the palladium plating layer is 0.25-5 microns.

4. A plating layer for a terminal surface according to claim 1, wherein: the thickness of the first gold plating layer is 0.025-0.75 microns.

5. A plating layer for a terminal surface according to claim 1, wherein: the thickness of the rhodium ruthenium coating is 0.015-3 microns.

6. A plating layer for a terminal surface according to claim 1, wherein: the anti-corrosion composite structure further comprises a copper plating layer arranged between the anti-corrosion composite layer and the terminal, and the thickness of the copper plating layer is 0.3-5 microns.

7. A plating layer for a terminal surface according to claim 1, wherein: the corrosion-resistant combined layer comprises a first nickel-tungsten coating, a second gold coating, a second nickel-tungsten coating and a third gold coating which are electroplated in sequence, and the surface area of the second gold coating is smaller than that of the first nickel-tungsten coating.

8. A plating layer for a terminal surface according to claim 7, wherein: the thickness of the first nickel-tungsten coating is 0.5-5 microns, the thickness of the second gold coating is 0.025-0.5 microns, the thickness of the second nickel-tungsten coating is 0.25-8 microns, and the thickness of the third gold coating is 0.005-0.8 microns.

9. A terminal, characterized by: a surface thereof plated with the plating layer as set forth in any one of claims 1 to 8.

10. An electronic interface, characterized by: comprising the terminal of claim 9.

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