Board-to-board connectors are an essential part of electronic devices as they are responsible for connecting and transmitting signals. With continuous technological advancements, there are now various types of board-to-board connectors available. Here are some commonly used types:

1. Rigid Connector:
The rigid connector consists of two opposing metal plates with insulation in between. It is the most common type of board-to-board connector. It offers stable signal transmission, affordability, and easy installation. However, rigid connectors typically have larger spacing, usually above 2.54mm, making them unsuitable for high-density connections.

2. Flexible Connector:
Flexible connectors are made of flexible materials and can be bent to accommodate a certain bending radius. They are suitable for high-density connections, have a small form factor, lightweight, and provide stable signal transmission. However, flexible connectors have a shorter lifespan, typically only a few hundred insertion/removal cycles.

3. Plastic Connector:
Plastic connectors mainly consist of plastic housing and metal contacts. They are affordable, easy to process, and convenient to install. However, plastic connectors may exhibit less stable signal transmission and susceptibility to interference.

4. Fiber Optic Connector:
Fiber optic connectors use optical fibers as the primary transmission medium. They offer long transmission distances, high transmission speeds, large capacity, and strong anti-interference capabilities. However, fiber optic connectors are relatively expensive and require complex installation.

These are just a few common types of board-to-board connectors, each with its advantages, disadvantages, and specific applications. When selecting a board-to-board connector, it is important to consider the specific requirements of your application.