A brief discussion on the methods of improving the performance of pin and bus connectors

First, control the existing and upcoming contact coating surface film.

Establish and maintain stable Row needle and row bus Impedance is Row needle and row bus Part of the demand for electrical performance. To achieve this, it is necessary to provide the inherent stability of the metal contact interface. To establish such a contact interface, the surface film must be avoided or split when contacting. These two different choices make clear the difference between precious or rare metals and ordinary metals.

Two, to a certain extent, the essence of precious metal deposits (gold, palladium and other alloys) is free surface film.

The metal contact at the interface produced by the coating is relatively simple, because only the movement of the companion on the contact surface is required. Usually this is easy to implement. In order to maintain the stability of contact interface impedance, the design of needle bar should pay attention to maintaining the precious metal of contact surface and preventing the influence of external factors such as pollutants, diffusion of base metal, contact wear and so on.

3、 Common metal coatings, especially tin and tin alloys, naturally cover the oxide film.

The function of tin contact coating is easy to be damaged when the oxide is matched, and the metal contact is easy to be established. The design requirement of the needle busbar is to ensure that the oxide film breaks when the needle busbar is matched, and the contact interface will not be oxidized during the validity period of the electric connection actuator. Reoxidation corrosion is the main performance degradation mechanism of tin contact coating in wear corrosion.Row needle and row bus The silver contact coating is preferably used as an ordinary metal coating. Because this coating is easy to be corroded by sulfide and chloride. Nickel coating is usually used as common metal in the formation of gas valve.

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