Today, the editor of a high brightness display screen manufacturer is going to share with you the technical characteristics of TFT displays, so that you can have a more comprehensive understanding of TFT displays.
TFT technology, developed in the 1990s, is a large-scale semiconductor fully integrated circuit manufacturing technology that uses new materials and processes. It is the foundation of liquid crystal (LC), inorganic and organic thin film electroluminescence (EL and OEL) flat panel displays. TFT display screens are various films that are necessary for manufacturing circuits on non single crystal chips such as glass or plastic substrates (which can also be on chips) through sputtering and chemical deposition processes. Large scale semiconductor integrated circuits (LSICs) are made by processing the films. The use of non single crystal substrates can significantly reduce costs, which is an extension of traditional large-scale integrated circuits towards large-area, multifunctional, and low-cost directions. Manufacturing TFT displays with controlled pixel (LC or OLED) switching performance on large-area glass or plastic substrates is more technically challenging than manufacturing large-scale ICs on silicon wafers. The requirements for the production environment (purity level of 100), the purity of raw materials (purity of electronic special gas is 99.99985%), and the requirements for production equipment and technology all exceed those of semiconductor large-scale integration, making it the top technology in modern large-scale production. Its main characteristics include:
large area
In the early 1990s, the first generation of large-area glass substrates (300mm) × The 400mm TFT-LCD production line was put into operation, and by the first half of 2000, the area of glass substrates had expanded to 680mm × 880mm), the nearest 950mm × A 1200mm glass substrate will also be put into operation. In principle, there is no limitation on area.
High Integration
The resolution of the 1.3-inch TFT chip used for LCD projection is XGA, which contains millions of pixels. Resolution is SXGA (1280 × The film thickness of the 16.1-inch TFT array amorphous silicon with a size of 1024 is only 50nm, and the integration degree of its IC, the requirements for equipment and supply technology, and the technical difficulty of TAB ON GLASS and SYSTEM ON GLASS technologies all exceed traditional LSIs.
Powerful features
TFT display screens were originally used as matrix site selection circuits to improve the light valve characteristics of liquid crystals. For high-resolution displays, precise control of object elements is achieved through voltage regulation in the range of 0-6V (typical values of 0.2 to 4V), making it possible for LCD displays to achieve high-quality high-resolution display. TFT-LCD is the first flat panel display in human history to surpass CRT in display quality. Nowadays, people are starting to integrate driver ICs onto glass substrates, making the entire TFT display screen more powerful, which is incomparable to traditional large-scale semiconductor integrated circuits.

low cost
Glass and plastic substrates fundamentally solve the cost problem of large-scale semiconductor integrated circuits, opening up broad application space for the application of large-scale semiconductor integrated circuits.
Flexible craftsmanship
In addition to traditional processes such as sputtering, chemical vapor deposition (CVD), and molecular chemical vapor deposition (MCVD) for film formation, laser annealing technology has also begun to be applied, which can produce both amorphous and polycrystalline films, as well as single crystal films. Not only can silicon films be made, but other II-VI and III-V semiconductor films can also be made.
Widely applicable fields
LCD flat panel displays based on TFT technology are the pillar industry of the information society, and the technology can also be applied to the rapidly growing thin film transistor organic electroluminescence (TFT-OLED) flat panel displays.
Ruxin Gaoliang is committed to creating long-term value for our customers. We are a high-quality domestic LCD display manufacturer with 13 years of experience in research, development, production, and sales, specializing in various types such as high brightness screens, bar screens, and small-sized LCD screens. We provide one-on-one professional services for you.