Connector development should be small (because many products face smaller and lighter development, for the spacing and appearance of the size, height have certain requirements, this product requirements will be more sophisticated, such as line to board the best choice of small pitch 0.6mm and 0.8mm), high-density, high-speed transmission, high-frequency direction development. Miniaturization refers to the connector center spacing is smaller, high density is to achieve large core count. High-density PCB (printed circuit board) connector effective contact number up to 600 cores, dedicated devices up to 5000 cores. High-speed transmission refers to the modern computer, information technology and network technology requirements signal transmission of the time-scale Darsouh frequency band, pulse time to sub-millisecond, and therefore requires high-speed transmission connector. High frequency is to adapt to millimeter wave technology development, RF coaxial connectors have entered the millimeter wave operating frequency band.