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Semiconductor materials refer to materials with special electrical properties in electronics and quantum mechanics, including silicon, germanium, silicon nitride, gallium selenide, etc. The special properties of these materials enable them to be used as materials in electronic devices, such as transistors, diodes, solar cells, etc.

Cutting, fillet, edging, baking, inner layer pretreatment, coating, exposure, DES (development, etching, film removal), punching, AOI inspection, VRS repair, browning, lamination, pressing, target drilling, Gong edge, drilling, copper plating, film pressing, printing, writing, surface treatment, final inspection, packaging and other processes are countless

It is generally considered that if the frequency of the digital logic circuit reaches or exceeds 45MHZ~50MHZ, and the circuit working above this frequency has accounted for a certain amount of the entire electronic system (for example, 1/3), it is called a high-speed circuit.

Semiconductor has the following characteristics: dopability, thermal sensitivity, photosensitivity, negative resistivity temperature, and rectifiability.

1. Introduction to chips What is a chip? A chip is an integrated circuit that can be compared to the brain of an electronic device. The components on a chip can perform various tasks, such as processing information, storing data, performing calculations, and controlling operations. Why is it called a chip? "Core" represents the core and center, and "chip" represents a thin piece or fragment. A chip is a thin piece made of semiconductor materials, which, as the core part of the entire circuit system, integrates key circuit structures.

In 1936, Austrian Paul Eisler first used printed circuit board in radio. In 1943, Americans mostly applied this technology to military radios. In 1948, the United States officially recognized that this invention can be used for commercial purposes. Since the mid-1950s, printed circuit boards have been widely used.