僅寫一次型光碟記錄媒體之研究

Study of recording media for write-once optical disc

陳明忠(Ming Jung Chen)

指導教授 ： Dr. Chung Ping Liu ； Dr. Tsun Ren Jeng

元智大學/工程學院/電機工程學系/碩士(2003年)

摘要

僅寫一次型光碟多是以有機染料為記錄層材料，但其可吸收的波長範圍較窄，且在生產時會造成環境污染等問題。因此本論文的主題在於探討以無機材料作為僅寫一次型光碟記錄層之可行性，並將其應用於DVD的系統之中。在此研究中，使用氧化銀與氧化鉻作為記錄層材料，以取代有機染料。
利用反應性濺鍍的方法，在不同的氧氣流量條件下，鍍製不同組成之氧化銀與氧化鉻膜層。為了探討氧化物記錄層之特性，採用X光繞射儀、光譜儀與熱重分析儀等儀器，來量測薄膜的結構、光學性質與熱學性質，以獲得有關氧化銀與氧化鉻膜層的物理特性。
以氧化銀與氧化鉻作為記錄材料之碟片，經由動態測試機分析其記錄特性，以及光學顯微鏡觀察記錄點的形狀。研究結果發現，氧化銀碟片具有較佳的寫錄特性，並且能夠滿足僅寫一次型光碟記錄媒體的要求規格。本研究證實了 : 利用無機材料來取代有機染料，作為僅寫一次型記錄媒體是可行性的。

關鍵字

僅寫一次型光碟 ； 無機材料 ； DVD的系統

並列摘要

In general, organic dyes are applied as the recording media of write-once optical disks. However, the optical absorption of organic dyes is limited within a narrow wavelength region. By the way, the environmental pollution caused by fabrication of organic dyes is also a considerable issue. The purpose of this study is to investigate the feasibility of inorganic materials as the write-once recording media and study the disk performances, especially in the DVD format. In this study, the AgOx or CrOx thin film was employed as the recording layer of the DVD-R disk.
AgOx and CrOx thin films were deposited on the glass substrates by reactive sputtering method. Compositions of the studied films were varied by controlling the oxygen flow rate. Physical characteristics, such as structures, thermal and optical properties of the studied films were analyzed by the techniques of X-ray diffraction, thermo-gravimetric analysis and optical spectra.
Dynamic characteristics of the write-once optical disks comprising AgOx or CrOx recording layer were evaluated by a dynamic tester, and the recording marks were observed by an optical microscope. The results showed that the AgOx material is superior to CrOx in the dynamic performances and satisfies the requirements for optical recoding. In conclusion, the feasibility of inorganic write-once recording media has been verified and the substitution for organic dyes has been demonstrated.

並列關鍵字

write-once optical disks ； inorganic materials ； DVD format

參考文獻

9.劉威志、林威志、蔡定平，“高密度近場光碟片”，物理雙月刊第二

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