In 1906, the American Deforest invented the vacuum triode, which was used to amplify the sound current of the telephone.
Since then, there has been a strong expectation that a solid device can be produced as a lightweight, inexpensive and long-life amplifier and electronic switch. In 1947, the birth of point-contact germanium transistors opened a new page in the history of electronic devices. However, this kind of point-contact transistor has a fatal weakness of unstable contact point in its construction. At the same time as the successful development of point-contact transistors, the junction transistor theory has been proposed, but until people can prepare ultra-high purity single crystals and can arbitrarily control the conductive type of crystals, junction crystal pipes really appear.
In 1950, the earliest germanium alloy transistor with useful value was born. In 1954, the junction silicon transistor was born. Since then, the concept of field-effect transistors has been proposed. With the emergence and development of material technologies such as defect-free crystallization and defect control, extra-crystal birth length technology and diffusion doping technology, pressure-resistant oxide film preparation technology, corrosion and lithography technology, a variety of electronic devices with excellent performance have appeared one after another, and electronic components have gradually entered the transistor era from the vacuum tube era and the era of large-scale and ultra-large scale integrated circuits. Gradually forming the semiconductor industry as a representative of high-tech industry.
It was invented by American physicists Shockley, Bardeen and Bratton. Electronic components are components of electronic components and electrically-small machines and instruments, which are often composed of several parts and can be used in similar products; It often refers to some parts of electrical appliances, radios, meters and other industries, such as capacitors, transistors, spring, spring and other sub-devices. Common are diodes and so on. Electronic components include: Resistors, capacitors, potentiometers, electronic tubes, radiators, electromechanical components, connectors, discrete semiconductor devices, electro-acoustic devices, laser devices, electronic display devices, optoelectronic devices, sensors, power supplies, switches, micro motors, electronic transformers, relays, printed circuit boards, integrated circuits, all kinds of circuits, piezoelectric, crystal, quartz, ceramic magnetic materials, printed circuits Substrate substrate, electronic functional process special materials, electronic adhesive (tape) products, electronic chemical materials and parts, etc. In terms of the quality of electronic components, there are CQC certification in China, UL and CUL certification in the United States, VDE and TUV in Germany and CE in the European Union and other domestic and foreign certifications to ensure the qualification of components.