Detailed explanation of each product that produced MURA

by:Kimeery     2021-09-03
Why is MURA produced?-For the CF process, the film thickness-the coefficient of the coating thickness is not uniform, resulting in uneven color. Coating-If the nozzle is blocked during the coating of the photoresist, it will cause verticalmura Why is MURA produced?-As far as the TFT process is concerned, Over-lap: The main structure of TFT is the connection between layers. If there is a shift in a layer, an abnormality will occur, which may affect MURA is caused by neutralizing the characteristics of TFT. Why is MURA produced?-As far as the mobile phone LCD manufacturing process is concerned, uneven cellgap: cell gap, high or low will cause the phenomenon of MURA. Spacer: uniformity of spacer dispersion and spacer The uniformity of the raw materials itself may affect the production of MURA. Roller: Because the roller of the machine is too large or the foreign matter is attached to the roller, the panel passes through the roller and produces pill-shaped or strip-shaped MURA. Stage: Due to the machine The suction of the stage is too large, causing stage mura to be formed after adsorption, or the flatness of the stage is not good, after passing through the process machine, it may also produce related MURA. Why is there MURA produced?-As far as the LCM process is concerned, Roller: Because the roller of the machine is too large or foreign matter is attached to the roller, the panel passes through the roller and produces pill-shaped or strip-shaped MURA. Vacuum: The stage mura. B/L is formed after the suction is caused by the excessive suction of the stage of the machine. MURA phenomenon can also be formed due to poor film material or abnormalities caused by other incoming materials, and cross-validation is usually used to confirm whether there is abnormality in B/L. Polarizer: The polarizer itself is poorly supplied, causing MURA to be formed after polarization. Usually it is OK after replacing the polarizer. Why is MURA produced?-Improper handling in terms of human factors: Due to the improper way of getting the panel, the force of the finger pressing the panel is too strong, which is easy to cause pill-shaped MURA.
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