强激光与粒子束, 2004, 16 (7): 825, 网络出版: 2006-05-15   

基于硅微加工技术的新型变形反射镜

Novel deformable mirror based on silicon micromachining technology
作者单位
1 华中科技大学 光电子工程系,湖北,武汉,430074
2 北京大学 微电子学研究所,微米/纳米加工技术国家重点实验室,北京,100871
摘要
给出了一种基于硅微加工技术的新型变形反射镜的设计和加工方法.变形反射镜镜面主体是由一定厚度的硅膜构成,硅膜上表面溅射有一层Ti/Au,背面有一7×7阵列的台柱与之相连,台柱下方是对应的驱动电极.当给电极施加电压时,产生的静电力就会拉动台柱向下运动,从而使相应的镜面部分发生变形;通过控制通电电极的位置及电压,就可获得特定的镜面形状.在变形反射镜的加工工序中采用浅腐蚀形成键合台,采用深腐蚀加工出台柱.并采用<110>条补偿图形对台柱的凸角进行补偿,在0.2MPa气压下进行键合,最后成功研制出有效反射面积为30mm×30mm,拥有49个静电驱动单元的变形反射镜.
Abstract
Based on silicon micromachining technology, a novel deformable mirror with 30mm×30mm effective reflecting surface and 49 actuators is designed and fabricated. It is composed of a silicon membrane, at the back of which is attached by a 7×7 pillars array. The pillars and bonding part are fabricated through two etching steps with different depth. In terms of optimization, a <110> strip pattern is designed specially for the convex corner compensation during the etching process, and the anodic bonding process is performed under 0.2MPa atmospheric pressures.
参考文献

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余洪斌, 陈海清, 张大成, 竺子民, 李婷. 基于硅微加工技术的新型变形反射镜[J]. 强激光与粒子束, 2004, 16(7): 825. YU Hong-bin, CHEN Hai-qing, ZHANG Da-cheng, ZHU Zi-min, LI Ting. Novel deformable mirror based on silicon micromachining technology[J]. High Power Laser and Particle Beams, 2004, 16(7): 825.

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