CN1563480A - 金刚石碳锥沉积方法 - Google Patents
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Abstract
金刚石碳锥沉积方法属于化学气相沉积微晶技术领域。其特征在于,采用平面型电感偶合射频等离子体化学气相沉积法,以氩气等惰性气体为载气,使用氢气和甲烷或己炔等碳氢反应气体,射频功率500~1500W;反应室气压5~500Pa;反应气体中氢碳原子比50~400;偏压功率0~300W;沉积时间10~240min。锥阵列的尺寸,密度和分布可通过样品表面预处理和沉积工艺参数来控制。这种微晶或纳米晶金刚石碳锥阵列有很好的应用前景,是一种非常理想的电子发射材料,在微机电系统(MEMS)中,如半导体金刚石探针,微型电夹,外科微型工具等,也将充分展示其巨大的优越性。
Description
技术领域
本发明属于化学气相沉积微晶技术领域。
背景技术
近年来,场发射成为一个非常活跃的研究领域。和液晶显示器相比,场发射显示器具有亮度高,良好的视角效果,低功耗,小尺寸,制作工艺简单等优点。随着场发射显示器的迅速崛起,对场发射材料提出了更高的要求。目前场发射领域研究最多的冷阴极材料是碳纳米管,金刚石和类金刚石薄膜,但在发射过程中碳纳米管的逐渐老化造成其场发射稳定性较差。多晶金刚石薄膜由于各种取向晶面的电子发射性能差异很大,且存在大量晶粒晶界,导致电子发射的不均匀性和不稳定性。至今为止,产品化的场发射显示器制作方法主流仍然是钼和硅尖锥,它要求大面积的精密微机械加工,成本大幅度上升,限制了它的竞争力。而且,钼易受污染,力学性能差,影响使用寿命。硅是一种相当脆的材料,同时,导热性能差,从这方面来看,把具有负电子亲合势,良好的化学稳定性,高硬度,高抗离子侵蚀能力,高热导率等优良性能的金刚石制备成有更稳定几何特性的锥体结构,将给显示技术带来一场革命。
发明内容
本发明的目的是在于提供一种获得形貌为圆锥尖状的金刚石阵列,锥的形核、尺寸大小及分布容易控制,合成工艺简单、成本低的金刚石碳锥沉积方法。
将非常理想的电子场发射材料——金刚石,制备成更稳定结构特征的锥体结构,使之更适合成为场发射显示器的冷阴极材料。
本发明的技术解决方案是,金刚石碳锥沉积方法的设备由以下几个部分组成:ICP射频电源及匹配网络1、CCP射频电源及匹配网络9、电感偶合天线2;真空室及真空系统3、10、12、衬底支架7、8、反应气体4、冷却水11。最大射频功率1.5KW,射频天线5匝,由水冷铜管绕制,天线2与沉积室12由介质3隔离,放置衬底的电极7水冷并屏蔽8,偏压源为300W射频电源,载气为氩等惰性气体,反应气体为氢气和甲烷或乙炔等碳氢气体。
平面型13.56MHz射频电感偶合等离子体是一种高密度的等离子体源,
根据锥尖的形核密度和分布要求对硅等样品进行预处理,如机械抛光或光刻等,然后用丙酮经超声波清洗5~15min。
样品6置于CCP电极上7,抽真空至2×10-3~5×10-3Pa,通入高纯氩气,开启ICP射频电源1,在1KW射频功率和0.133~1.33Pa压力下,等离子体清洗样品3~5min。关ICP射频电源;通入甲烷和氢气,调节Ar/CH4/H2混合比,其流量范围分别为50~200sccm;0.5~10sccm;40~50sccm,将反应室压力控在5~500Pa;同时开启ICP和CCP射频功率开始碳锥合成,功率分别为500~1500和0~300W,合成时间10~240min。
Ar/CH4/H2流量分别为100/1/45sccm;工作压力为240Pa;ICP功率1000W;CCP功率50W;沉积时间30min。
本发明的效果和益处是,很容易获得形貌为圆锥尖状的金刚石阵列,锥的形核,尺寸大小,及分布容易控制,合成工艺简单,成本低。
附图说明
图1是本发明的结构原理图。
图中,1.ICP射频电源及匹配网络;2.ICP天线;3.圆桶型石英窗口;4.反应气体引入口;5.等离子体区;6.衬底;7.CCP电极;8.CCP电极屏蔽;9.CCP射频电源及匹配网络;10.真空泵;11.冷却水;12.不锈钢真空室。
具体实施方式
下面结合附图和具体实施方式对本发明作进一步说明。
硅样品6置于CCP电极上7,抽真空至10-3Pa,通入高纯氩气,开启ICP射频电源1,在1KW射频功率和1Pa压力下,等离子体清洗样品4min。关ICP射频电源。
通入甲烷和氢气,调节Ar/CH4/H2混合比,其流量范围分别为100sccm、1sccm、45sccm,将反应室压力控制在20Pa。同时开启ICP和CCP射频功率开始碳锥合成,功率分别为1000W和50W。合成时间30min。
Claims (2)
1.金刚石碳锥沉积方法,其特征在于,样品置于CCP电极(7)上,抽真空至2×10-3~5×10-3Pa,通入氩气,开启ICP射频电源(1),在1KW射频功率和0.133~1.33Pa压力下,等离子体清洗样品3~5min,关ICP射频电源(1);通入甲烷和氢气,调节Ar/CH4/H2混合比,其流量分别为50~200sccm、0.5~10sccm、40~50sccm,将反应室压力控在5~500Pa;同时开启ICP射频电源(1)和CCP射频电源(9)开始碳锥合成,射频功率分别为500~1500W和0~300W,反应室压力5~500Pa,合成时间10~240min。
2.根据权利要求1所述的金刚石碳锥沉积方法,其特征在于,Ar/CH4/H2流量分别为100/1/45sccm;工作压力为240Pa;ICP功率1000W;CCP功率50W;沉积时间30min。
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100442438C (zh) * | 2006-12-20 | 2008-12-10 | 南京大学 | 一种非晶碳膜半导体制备方法 |
CN103392218A (zh) * | 2010-12-23 | 2013-11-13 | 六号元素有限公司 | 用于制造合成金刚石材料的微波等离子体反应器 |
CN105839071A (zh) * | 2016-04-19 | 2016-08-10 | 中国科学院大学 | 双频电感耦合射频等离子体喷射沉积金刚石的方法 |
CN109487204A (zh) * | 2018-11-16 | 2019-03-19 | 苏州神龙航空科技有限公司 | 一种轻质合金材料耦合等离子体表面处理装置及处理方法 |
WO2021145992A1 (en) * | 2020-01-15 | 2021-07-22 | Applied Materials, Inc. | Methods and apparatus for carbon compound film deposition |
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2004
- 2004-04-22 CN CN 200410020451 patent/CN1563480A/zh active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100442438C (zh) * | 2006-12-20 | 2008-12-10 | 南京大学 | 一种非晶碳膜半导体制备方法 |
CN103392218A (zh) * | 2010-12-23 | 2013-11-13 | 六号元素有限公司 | 用于制造合成金刚石材料的微波等离子体反应器 |
CN103392218B (zh) * | 2010-12-23 | 2016-05-11 | 六号元素有限公司 | 用于制造合成金刚石材料的微波等离子体反应器 |
CN105839071A (zh) * | 2016-04-19 | 2016-08-10 | 中国科学院大学 | 双频电感耦合射频等离子体喷射沉积金刚石的方法 |
CN109487204A (zh) * | 2018-11-16 | 2019-03-19 | 苏州神龙航空科技有限公司 | 一种轻质合金材料耦合等离子体表面处理装置及处理方法 |
WO2021145992A1 (en) * | 2020-01-15 | 2021-07-22 | Applied Materials, Inc. | Methods and apparatus for carbon compound film deposition |
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