淡江大學機構典藏:Item 987654321/51794
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    题名: 光放射光譜對化學汽相沉積法合成鑽石薄膜之研究
    其它题名: Optical emission spectrum study in grow diamond films by CVD
    作者: 呂理暐;Lu, Lie-wei
    贡献者: 淡江大學物理學系碩士班
    林諭男;Lin, I-nan
    关键词: 鑽石;化學汽相沈積法;奈米線;氮氣;超耐米晶鑽石膜;MPCVD;MCD;UNCD;Nanorods;Diamonds;Nitrogen
    日期: 2010
    上传时间: 2010-09-23 16:08:00 (UTC+8)
    摘要: 本研究主要是利用微波電漿化學汽相沉積系統中用純氫氣、氬氣與氮氣的三種氣氛下沉積鑽石薄膜並在製成過程中,用光發射光譜(opical emission spectropy) 觀察電漿成分及變化,藉此討論電漿與成長鑽石薄膜的關聯性。(i)在甲烷/氫氣電漿中主要是成長出0.5-1um柱狀的鑽石結構也發現隨著壓力變化,大晶粒比例開始變多,而且非鑽石之碳物種以外其他物種比例也開始變多。(ii)在甲烷/氬氣電漿中可成長出2-10 nm的超奈米球鑽石結構。壓力變化下雖然表面形貌與內部結構都相似,但是以150 torr的表面形貌看起來較密集。(iii)在甲烷/氮氣電漿中成功的長出鑽石薄膜,其結構為50-100 nm針狀鑽石結構。另外,也發現2-10 nm的超奈米球結構,在80 torr以後有發現參雜效果增加,在氮氣電漿會產生參雜的效果,導致在氮氣電漿成長之鑽石薄膜有較好的場發射特性。
    This research discussed to growth behaviar of diamond films in methane /argon, methane/hydrogen or methane/nitrogen plasma by MPCVD (microwave plasma chemical vapor depositon)。We examined the optical emission spectrum as to investigate the correlation between plasma and characteristics of diamond films。(i)With methane/hydrogen plasma, we obtianed columnar like diamond films which grain size about 0.5~1 um, besides We found that the relative proportion of larger grains and non-diamond carbonspecies is increasing with pressure。(ii)With methane/argon plasma, we obtained ultrananocrystalline diamond film count grain size about 2~10 nm. With methane/nitrogen plasma, we obrained acicular diamond films crystalline grain size about 50-100 nm, coexisting with the ultrananocrystalline diamond grains with size about 2~10 nm。In addition, we found acicular diamond grains in 80 torr, where the doping effect operating。The diamond films have better field emission value due to doping effect in the methane and nitrogen plasma。
    显示于类别:[物理學系暨研究所] 學位論文

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