인듐-틴옥사이드(ITO) 투과전극 위에 텅스텐옥사이드 박막을 표시전극으로 한 무기계 일렉트로크로믹 표시소자를 고주파스퍼터링 및 진공증착법으로 제작하였다. 일렉트로크로믹 표시소자의 응답시간, 기억시간, 안정성, 발색 및 소색특성을 연구하였다. 리튬염, 유기용매계의 액체전해질에서 표시전극을 발색, 소색시켰을 때, 전해질 중의 수분의 양이 증가함에 따라 표시전극의 발색전류 및 소색전류는 증가하였다. WO₃ 박막과 MgF₂ 박막 사이에 SiO₂박막을 증착시켜 전류손실을 줄임으로써 ECD cell의 광학농도 및 응답속도를 향상시킬 수 있었다. 상보형 일켁트로크로믹 표시소자의 경우, -3.0V 이하에서 가스발새은 엑제되었고, 발색도는 향상되었다. LiF 고체전해질을 이용한 경우 응답속도 및 기억특성을 우수하였으나, 발색ㆍ소색 cycle 횟수가 증가함에 따라 소색이 잘 되지 않은 경향을 보여주었다.

The inorganic electrochromic display device used tungsten oxide thin film on indium-tin oxide trans-parent electrode as a display electrode. Display electrode was made by rf-sputtering and evaporation methods. The characteristics of electrochromic display device such as response time, memory time, stability, coloration and bleach were studied. When display electrode was colored and bleached in the liquid electrolyte of lithium salt-organic solvent, the color-ing current and bleaching current of display electrode were increaaed by increasing the amount of water in electrolyte. The optical density and response rate of ECD cell were enhanced by depositing SiO₂ film between WO₃ film and MgF₂ film, and decreasing the leak current. In the case of ECD cell with two coloring layers, gas evolution was suppressed and the degree of coloration was en-hanced below -3.0V. In the case of using LiF solid electrolyte, the response rate and memory characteristics were ex-cellent, but bleaching was poor as the number of coloration and bleaching cycle increases.

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