What is integrated circuit ic?

　　In recent years, the semiconductor industry has been extremely competitive, and the development rate of ic has been significantly improved, and great progress has been made in terms of capacity and size. In fact, ic also has a name called integrated circuit, so we usually often hear about the integrated circuit ic, in the end what does it mean?

　　A, the definition of integrated circuit ic

　　Integrated circuit is a miniature electronic device or component. Using a certain process, in a small or several small semiconductor wafer or dielectric substrate, a circuit required transistors, diodes, resistors, capacitors, inductors and other components and wiring connected together, and then packaged in a tube shell, becoming a microstructure with the required circuit function; in which all components are structurally formed a whole, so that electronic components to the miniaturization, low power consumption, high reliability A big step forward, indicated by the letter ic in the circuit.

　　Integrated circuit ic

　　Second, the classification of integrated circuit ic

　　Integrated circuit ic types are rich and diverse, here from three perspectives, can be divided into the following categories.

　　1. According to the different functions and structures can be divided into three categories: analog integrated circuits, digital integrated circuits and digital / analog hybrid integrated circuits.

　　Analog integrated circuits, also known as linear circuits, are used to generate, amplify and process a variety of analog signals (meaning range signals that change with time boundaries. Examples include audio signals from semiconductor radios, tape signals from tape recorders and amplifiers, etc.), where the input signal is proportional to the output signal.

　　Digital integrated circuits are used to generate, amplify, and process a variety of digital signals (referring to discrete-value signals in time and range. For example, vcd and dvd playback of audio signals and video signals).

　　2. According to their different production processes, they can be divided into three categories: semiconductor integrated circuits, membrane integrated circuits and hybrid integrated circuits.

　　Semiconductor integrated circuit is an integrated circuit with certain circuit functions, using semiconductor technology, in the silicon substrate to produce resistors, capacitors, transistors, diodes and other components; membrane integrated circuit is in the form of film on insulating objects such as glass or ceramic sheet to produce resistors, capacitors and other passive devices. Passive components can have a wide range of values and high precision. However, the technology level cannot produce active devices such as crystal diodes and transistors in the form of membranes, so the application range of membrane integrated circuits is greatly limited.

　　In practical applications, mainly passive membrane circuits are added to semiconductor integrated circuits or active devices such as diodes and transistors of discrete components to form a whole, i.e., hybrid integrated circuits. According to the thickness of the film, membrane integrated circuits are divided into thick-film integrated circuits (1μm to 10μm thick) and thin-film integrated circuits (1μm thick or less). Semiconductor integrated circuits, thick film circuits and a small number of hybrid integrated circuits are mainly encountered in the maintenance of home appliances and general electronic production processes.

　　3. According to the different types of conductivity, divided into two categories of bipolar integrated circuits and unipolar integrated circuits

　　Bipolar integrated circuit frequency characteristics are good, but the power consumption is large, and the production process is complex, the vast majority of analog integrated circuits and digital integrated circuits in ttl, ecl, htl, lsttl, sttl type belongs to this category.

　　Unipolar integrated circuit operating speed is low, but the input impedance is high, power consumption is small, simple production process, easy to large-scale integration, its main products for the mos-type integrated circuit.