Discharge Characteristics Of MgO Doped With LaB₆

The plasma display panel is using gas discharge, self-luminous display technology,compared to other monitors PDP has many advantages: the screen is thinner, lightweight high brightness, fast response, high gradation while simple internal structure, easy crafts, suitable for mass production.In the energy-saving environment,the high-power will hinder the development of PDP.So this departure start from the PDP dielectric layer, change its structure, on the original single MgO protective layer coated by composite film, to improve secondary electron emission coefficient of the film, reducing the discharge delay time, improve the discharge efficiency of the PDP, and while increasing the brightness of the screen.According to international research, we proposed that incorporation of La B6 into the MgO target, and using RF Sputtering coating on the AC-PDP front substrate.1. By changing the sputtering time and sputtering power to study the effects of RF sputtered film of La B6. Test found that with increasing sputtering power the crystal orientation of LaB6 film(100) having a sufficient growth to ensure that the LaB6 excellent discharge characteristics. We also found that the film thickness is not proportional to the sputtering time, the longer the slower film growth. Also via XPS test results, when the cavity having fewer oxygen content, LaB6 ingredients will not be changed.2. Also studied under different sputtering power and different ratio of LaB6 doped sputtering, found doping the LaB6 mass ratio of 3% to the target(MgO-LaB6) and at 100 W power the film grown preferably, the transmittance ideal. Doped LaB6 composite film XPS analysis results, the La element and B element may be in a replacing mode into the MgO film.3. Through elaborated the test-device, we analysed reasons of using Bi-directional pulse control power, but also raised some questions and approximate solutions from the film discharge test, which we found the circuit design will largely affect the AC-PDP power. Subsequently, the article studied the discharge relationship with the aging time, aging with a reasonable method will help improving the discharge characteristics of the film. In the glow discharge, the aging time was 10 hour, the film surface of the substrate give a solid, ignition voltage is reduction and become stable.4. We concluded the better process parameters from discharging test in the different concentrations of Xe gas and the different gas pressure environment, the sputtering power is 100 W,MgO-La B6 target the LaB6 material mass ratio is 3%, and the sputtering Ar: O2 is 80: 5(in sccm). With the 10% Xe-Ne and 400 torr pressure the discharge test data showed that dielectric layer contrast with the MgO single dielectric protective layer, ignition voltage is reduced by about 28%, maintaining the voltage drop by about 31%, reducing the discharge delay time 0.5us. Comparison showed that, MgO-LaB6 / MgO bilayer films can effectively improve the performance of AC-PDP discharge, improving the responsiveness of the screen.