Articles & Issues

Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 26, 2004
Accepted November 11, 2004

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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플라즈마 디스플레이 패널(PDP)의 방전과 열화공정에 따른 표면으로부터의 기상특성

Gasification from Surface during Discharge and Thermal Process in Plasma Display Panel (PDP)

소현 이상무 문세기 김영채^†

Hyun Soh Sang Moo Lee Sei-Ki Moon Young Chai Kim^†

한양대학교 화학공학과, 133-791 서울시 성동구 행당동 17

Department of Chemical Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea

Korean Chemical Engineering Research, December 2004, 42(6), 716-721(6), NONE Epub 11 January 2005

Abstract

플라즈마 디스플레이 패널(PDP)은 패널 내부에서 플라즈마 방전을 발생시키기 위해 혼합가스를 사용한다. PDP 내부는 상판과 하판 사이의 공간에서 방전으로 인한 활발한 반응을 일으키는 조건에 존재한다. 방전 및 열 공정 조건변화가 상판의 MgO 보호막과 하판의 형광체에 미치는 영향을 연구했다. 방전영역에서 발생하는 CO, CO₂, OH와 H₂O 등의 불순성분은 PDP작동 수명에 악영향을 준다. MgO보호막과 형광체 표면에 존재하는 성분을 전자분광기(X-ray Photoelectron Spectroscopy)에 의해 관측했고 표면에서 생성되는 기상화합물을 질량분석기(Quadropole Mass Spectrometer)를 이용해서 기상특성을 분석했다. 방전 및 열처리로 표면에 존재하는 탄소성분이 기상화합물로 전환되어 C⁺, CO⁺, Co₂⁺의 탄소를 포함한 물질로 표면으로부터 급격히 기상화되었다. MgO막과 형광체에 존재하는 탄소 불순물은 PDP의 안정성을 저해하는 주요 원인이다.

Plasma display panel(PDP) uses the mixture of inert gases to generate a discharge inside display pixels. Inside of PDP, there exists highly reactive conditions in the gap between two glass panels. Chemical properties of MgO layer and phosphor have been investigated as a function of discharge and thermal process. Impurities such as CO, CO₂, OH and H₂O in discharge region may deteriorate the characteristics of PDP operation during life time. Change of impurity generation of various MgO and phosphor surfaces were measured by using x-ray photoelectron spectroscopy (XPS) and quadropole mass spectrometer (QMS). Concentrations of carbon containing species such as C, CO and CO₂ were drastically increased from surfaces during discharge and thermal treatment. Carbon impurities on the MgO and phosphor are the dominant factor for their instability.

Keywords

Plasma Display Panel Aging XPS MgO Phosphor

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