PDP용 MgO 박막의 스퍼터 연구

Sputtering of Magnesium Oxide this film for Plasma Display Panel Application

An MgO thin film sputtering system for the PDP (Plasma Display Panel) applications has been developed. This system was manufactured with a vertical In-Line type of 42 inch, which has the length of 520 mm and the width of 900 mm. A reactive magnetron discharge for this sputtering was generated using an unipolar pulsed power supply which has functions of constant voltage (Max. 500 V) and current (Max. 15 A) control, frequency of $10{\sim}100$ kHz and duty ratio of $10{\sim}60$ %. The experiment was conducted under various conditions : $3{\sim}10$ mTorr of pressure, the ratio of $O_2$/Ar = $0.1{\sim}0.5$, 50 % of duty and power of $0.5{\sim}1.7$ kW. From the experiment, the deposition rate of a static state and a moving state were measured to be about 45 nm/min and 6 nm m/min at the distance of 50 mm between the target and the substrate, respectively.