What is the Full Form of TFT?

TFT Full Name is Thin Film Transistor. This is a special field-effect transistor. The thin film of dielectric layers and metal contact with an active semiconductor layer on the substrate. There is a normal substrate glass, because the primary application of TFT is in liquid crystal display. It is different from conventional transistor, where semiconductor material is usually substrate, such as silicon wafer.

The use of liquid crystal displays is a direct-driven image element with the same simple display in the calculator and other devices, and therefore, the voltage of only one segment of these types of displays can be easily applied. This would be impractical for a bigger display, because it will have a lot of pixels, and in this way for each of the three colors, to avoid this, millions of connections per pixel (red, green and blue) need a problem Yes, the pixels should be known in rows and columns, which will reduce the number of connections from thousands to thousands. Column and line wire are connected to transistor switches, prevents the current path of transistor for each pixel, which is removed between refractions in each image of the display. Between each pixel transparent conductive ITO layers, sandwich contains a small capacitor with a layer of liquid crystal insulating.

Circuit layout of TFT-LCD is similar to semiconductor products. However, there is no place to make transistor from silicon, which is made in crystalline silicon wafer made from a thin film of silicon grain on the glass panel. The silicon layer for TET-LCD is usually used with PECVD process. The transistor takes only a small portion of the area of ​​each pixel and the remaining silicon film is removed so that the light can be easily passed.

Polycystryline silicon is used at any time, requiring high TFT performance, in the example, displays small high resolution such as found in projectors or viewfinders. Amorphous silicon-based TFT is the lowest cost of production for most reasons, whereas polycinin silicon TFT is more expensive and more difference.

Devices that use Thin Film Transistor Technology:-

• Computer monitors
• Laptops
• Television sets
• Personal digital assistants (PDAs)
• Mobile phones
• Video gaming systems
• Navigation systems
• AMOLED screens also contain a TFT layer