1. A wide range of products. According to the classification and coding statistics of electronic products compiled by the former Electronics Department, there are altogether 2,519 subcategories of 206 categories of electronic components except integrated circuits, among which 260 subcategories are 13 categories of electronic vacuum devices. Discrete semiconductor devices (including lasers, optoelectronic devices, etc.) are divided into 18 categories and 379 sub-categories; There are 17 electronic components specialties, 161 categories and 1284 subcategories. There are 14 categories and 596 subcategories of electronic materials.
2. This is a highly professional and multidisciplinary collection. There are great differences between production processes and production equipment, testing techniques and equipment. This is not only the difference between electro-vacuum devices, semiconductor devices and electronic components, but also between major categories and even sub-categories of various industries.
3. Sets and series. This depends on the entire machine's electronic circuits, band and frequency characteristics, accuracy, function, power, storage and service conditions, environment and service life requirements.
4. Investment intensity varies greatly in different periods, especially production scale, product output, production conditions and production environment requirements. Investment in high-technology products requiring mass production has increased by an order of magnitude, often to $100 million and as low as $50 million; Other products, although technically difficult, have limited output, low degree of equipment automation and much less investment intensity.