A Silicon Integrated Micro Positioning xy-Stage for Nano-Manipulation  

用于纳米操作的硅基集成式微型xy定位平台(英文)

作　　者：王家畴[1] 荣伟彬[1] 孙立宁[1] 李欣昕[2] 

机构地区：[1]哈尔滨工业大学先进机器人与系统国家重点实验室,黑龙江150001 [2]中国科学院上海微系统与信息技术研究所传感技术国家重点联合实验室,上海200050

出　　处：《Journal of Semiconductors》2008年第10期1932-1938,共7页半导体学报（英文版）

基　　金：国家杰出青年基金(批准号:50725518);国家高技术研究发展计划(批准号:2007AA04Z315);长江学者和创新团队发展计划资助项目~~

摘　　要：An integrated micro positioning xy-stage with a 2mm × 2mm-area shuttle is fabricated for application in nano- meter-scale operation and nanometric positioning precision. It is mainly composed of a silicon-based xy-stage,electrostatics comb actuator,and a displacement sensor based on a vertical sidewall surface piezoresistor. They are all in a monolithic chip and developed using double-sided bulk-micromachining technology. The high-aspect-ratio comb-driven xy-stage is achieved by deep reactive ion etching （DRIE） in both sides of the wafer. The detecting piezoresistor is located at the vertical sidewall surface of the detecting beam to improve the sensitivity and displacement resolution of the piezoresistive sensors using the DRIE technology combined with the ion implantation technology. The experimental results verify the integrated micro positioning xy-stage design including the micro xy-stage, electrostatics comb actuator,and the vertical sidewall surface piezoresistor technique. The sensitivity of the fabricated piezoresistive sensors is better than 1.17mV/μm without amplification and the linearity is better than 0. 814%. Under 30V driving voltage, a ± 10vm single-axis displacement is measured without crosstalk and the resonant frequency is measured at 983Hz in air.针对纳米级定位平台小型化和高定位精度的要求,基于体硅工艺研制出一种集结构、驱动和位移检测一体化的集成式微型纳米级xy定位平台.采用体硅双面深度反应离子刻蚀(DRIE)技术释放出高深宽比的静电梳齿驱动器、检测梁及定位平台结构.由于定位平台属于面内运动,为了提高面内运动位移检测的灵敏度提出了一种利用离子注入工艺和DRIE技术相结合制作检测梁侧壁压阻的方法,并利用该侧壁压阻工艺成功地把基于侧壁压阻式的位移传感器集成到微型xy定位平台上.实验测试表明,位移传感器的灵敏度优于1.17mV/μm,线形度优于0.814%,当驱动电压取30V时,定位平台的单轴输出位移可达±10μm,并且定位平台x方向和y方向上的位移耦合量非常小;在空气条件下测得定位平台的一阶固有频率为983Hz.

关 键 词：MEMS integrated micro xy-stage electrostatics comb actuator vertical sidewall surface piezoresistor inplane 

分 类 号：TP274.4[自动化与计算机技术—检测技术与自动化装置]