PCB (printed circuit board) is an indispensable component in electronic devices. It not only provides physical support for electronic components, but also realizes the electrical connection between them. From simple household appliances to complex aerospace equipment, PCBs are everywhere, and their manufacturing process involves multiple steps, each of which is crucial and directly related to the performance and quality of the final product.

Diode and transistor are two commonly used semiconductor devices in electronic circuits. There are many differences between them in structure, working principle, characteristics and application.

In today's digital age, chips are widely used in various devices and systems as a key driving force in the field of modern science and technology. However, according to different application scenarios and needs, chips are divided into different levels, of which industrial-grade chips and consumer-grade chips are two common types.

Gyroscope sensor is a sensor based on the principle of Coriolis force, composed of sensitive elements, detection circuits and signal processing circuits, used to measure the angular velocity and angular displacement of objects, and widely used in aerospace, automotive electronics, consumer electronics, robotics and other fields.

Silicon controlled rectifier (SCR for short) is an important semiconductor device, widely used in the field of power electronics. It has the advantages of small size, light weight, high efficiency and long life, and can achieve precise control of large current and high voltage.