Some data show that compared with the domestic market, the demand for semiconductor chip bases and probes in 2019 is US $182million, accounting for only about 15% of the global market. This data is obviously inconsistent with China's annual consumption of about 33% of the global chips. It is understood that the data deviation here [...]
Technical content of reliability test equipment_ Market report on semiconductor chip packaging test socket and probe Some data show that compared with the domestic market, the demand for semiconductor chip bases and probes in 2019 is US $182million, accounting for only about 15% of the global market. This data is obviously inconsistent with China's annual [...]
Brief description of QFN package QFN (quad flat no leads package) is a pin free package, which is square or rectangular. There is a large area of exposed pad in the center of the bottom of the package for heat conduction, and there are conductive pads for electrical connection around the package periphery of the [...]
Whether military aircraft or civil aircraft, there will be several sets of communication equipment. Some are connected with satellites and some are connected with the ground. No matter what kind of connection, you need an antenna. Even a small four rotor UAV needs to be located through GPS antenna. Similarly, there are more and more [...]
CCL industry is in the middle of the whole PCB industry chain and provides raw materials for PCB industry. Copper clad laminate (CCL) is a kind of plate-like material made by impregnating, drying, cutting and stacking electronic glass fiber cloth or other reinforcing materials with resin adhesive, covering one or both sides with copper foil [...]
In the frequency band greater than 10GHz, PCB microstrip printed antenna has obvious advantages over waveguide slot antenna, lens antenna, reflector antenna and other antennas. Mature PCB processing technology can effectively control the production cost of microstrip antenna. The multilayer hybrid technology of microstrip antenna circuit board, microwave RF board and low-frequency digital analog circuit [...]
Microwave usually refers to the electromagnetic wave in the frequency range of 300MHz ~ 300GHZ. Its wavelength is about 1m to 1mm. It can be further subdivided into decimeter wave, centimeter wave and millimeter wave radar plate. Its corresponding frequencies are UHF, ultra-high frequency, SHF and EHF. With the development of modern microwave technology, submillimeter [...]
Semiconductor materials are a kind of electronic materials with semiconductor properties (the conductivity is between conductor and insulator, and the resistivity is about 1m Ω· cm ~ 1g Ω· cm), which can be used to make semiconductor devices and integrated circuits. According to the type, it can be divided into element semiconductors and compound semiconductors. [...]
Looking at the current mobile phone brands, anyone who can develop their own chips can develop their own baseband. Only apple develops its own chips, but baseband needs to rely on a third party. Many people don't understand that Apple has developed mobile phones for more than ten years, and even the most difficult CPU [...]
Common devices on the circuit board include: resistance, capacitance, diode, triode, thyristor, touch switch, liquid crystal, light emitting diode, buzzer, various sensors, chips, relays, etc. Moreover, electronic components have different packaging types. The shapes of different types of components are the same, but the internal structure and uses are very different. For example, the components [...]