201221-1 Connectors, Interconnects

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Backplane connectors are electronic devices that provide high-speed connectivity between the backplane and pluggable cards installed in the system. Backplane connectors are usually used in enterprise computing, server-level communications, and/or networking applications. There are two main types of backplane connectors, namely printed circuit board-mounted (PCB) and surface-mounted (SMT) backplanes.The main purpose of using a backplane connector is to provide a uniformly buffered, highly reliable connection between cards in a system, without sacrificing performance. Backplane connectors have a wide range of applications, from PCs to servers, network routers, and telecom systems. The majority of backplane connectors are designed for use in a specific type of application, rather than to be used across multiple industries.Backplane connectors are typically connected using pin and solder joints, or liquid crystal polymer (LCP) soldermask. The soldermask ensures that each connection point is properly filled and provides good solder joints. There are many types of metals used in backplane connectors, such as copper, aluminum, and tin. The metals used depend on the application’s requirements, and therefore vary from one application to another.When choosing a backplane connector for a given application, the key factors to consider include current capacity, contact resistance, thermal resistance, and reliability. The current capacity of a backplane connector is determined by the number of pins in the connector, and the thickness of the metal it is made out of. The contact resistance of a backplane connector is based on the physical contact between the connector and the backplane, and its resistance to flux and other contaminants. The thermal resistance of a backplane connector is determined by its ability to dissipate heat, and is important for applications that require high performance at higher temperatures. Finally, reliability is an important factor, as backplane connectors are expected to perform reliably over long periods of time.The working principle of backplane connectors is relatively simple. At its core, a backplane connector consists of a number of electrical contacts, typically arranged in a parallel array. When a pluggable card is inserted into the connector, these electrical contacts make contact with the card’s connection pins, forming a connection and allowing data to flow between the backplane and the card.Backplane connectors are an integral part of many systems, and their variety of applications ensures that they continue to be an important part of our technology landscape. Whether the application is a computer, network router, communication system, or another device, these connectors provide a reliable, high-speed connection between components and ensure that data is transferred quickly and accurately.

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