What is a thick film circuit: a passive network is fabricated on the same substrate by a thick film process such as screen printing and sintering, and a discrete semiconductor device chip or a monolithic integrated circuit or a micro component is assembled thereon, and then packaged. Hybrid integrated circuit.
Advantages of thick film circuits: Thick film hybrid integrated circuits are a kind of miniature electronic functional parts. The advantage is that the design is more flexible, the process is simple, the cost is low, and it is especially suitable for multi-variety small batch production. In terms of electrical performance, it can withstand Subject to higher voltages, greater power and higher currents. Thick-film microwave integrated circuits can operate at frequencies above 4 GHz. It is suitable for use in a variety of circuits, especially for consumer and industrial electronics. Circuit.
Why is there a thick film circuit: the resistance and the conductor film thickness are generally more than 10 micrometers, and the film thickness of the circuit formed by the sputtering process is called thick film. Its appearance is to improve the stability of this part of the circuit. Some other performances were later produced by the development of "shared circuits". Some of the products have a part of the same circuit, and then there is a process of separating these circuits into mass production.
Scope of application: With the development of technology, thick-film hybrid integrated circuits are increasingly used, and they are mainly used in aerospace electronic equipment, satellite communication equipment, electronic computers, communication systems, automotive industries, etc., and later developed into audio equipment, microwave equipment, and Household appliances, etc. Thick film hybrid integrated circuits have penetrated into many industrial sectors. In Europe, the application of thick film hybrid integrated circuits in computers is dominant, and then in the telecommunications, communications, military and aerospace sectors. Consumer electronics products use a large number of thick film hybrid integrated circuits. The United States is mainly used for aerospace, communications and computers, with communications accounting for the highest proportion.
In the color TV industry, thick film circuits are generally used as power circuits and high voltage circuits, including switching power supply circuits, video amplifier circuits, frame output circuits, voltage setting circuits, high voltage limiting circuits, sound circuits, and comb filter circuits.
In the aerospace and aerospace industries, thick-film hybrid integrated circuits are used in airborne communications, radar, and fire control systems due to their structural and design flexibility, miniaturization, lightweight, high reliability, shock and vibration resistance, and radiation resistance. A large number of applications have been obtained in communications, television, radar, remote sensing and telemetry systems for missile guidance systems and satellites and various space vehicles.
In the military industry, thick film circuits are generally used as high-stability, high-precision, small-volume module power supplies, sensor circuits, preamplifier circuits, power amplifier circuits, and so on.
In the automotive industry, thick film circuits are commonly used as generator voltage regulators, electronic igniters, and fuel injection systems.
In the computer industry, thick film circuits are commonly used in integrated memory, digital processing units, data converters, power supply circuits, hot stamping heads in printing devices, and the like.
In communication equipment, thick film hybrid integrated voltage controlled oscillator, module power supply, precision network, active filter, attenuator, line equalizer, side noise suppressor, voice amplifier, high frequency and intermediate frequency amplifier, interface impedance converter , user interface circuit, relay interface circuit, two/four-wire converter, automatic gain controller, optical signal transceiver, laser generator, microwave amplifier, microwave power splitter, microwave filter, broadband microwave detector, and the like.
In instrumentation, machine tool numerical control industry and other fields, thick film multi-layer step line technology has been successfully used in the decoding and driving circuit of digital display tube. Transparent thick film is also used for the electrode of cold cathode discharge type and liquid crystal type digital display tube. .
In addition, thick film technology has the potential to continue to grow in many emerging edge disciplines that intersect with electronic technologies: magnetic and superconducting membrane devices, surface acoustic wave devices, and membrane sensitive devices (thermal, Photosensitive, pressure sensitive, gas sensitive, force sensitive), membrane solar cells, integrated optical circuits, etc.
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Label: Analysis of thick film circuit characteristics
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