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Method and apparatus for rotation of a workpiece in supercritical fluid solutions for removing photo resist, residues and particles therefrom

机译:在超临界流体溶液中旋转工件以从中去除光刻胶,残留物和颗粒的方法和设备

摘要

A supercritical fluid cleaning system uses process fluid for operating rotary motors in the chamber with fluid bearings and fluid load levitation for rotating workpieces and impellers. Rotating speed and direction sensors and a home position locator facilitate motor control. Impellers add further agitation of the fluid in the chamber, faster processing, and greater uniformity of supercritical fluid components and increase mass transfer of fluid to the processed surface. Centrifugal operated clips and cassettes hold wafers and impellers. Non-contact, fluid operated rotating mechanisms reduce contamination. Physical, rotational, and shear affects are enhanced through centrifugal forces which can induce the separation of films localized deposits or molecular products of the reaction from the surface. There is a concomitant agitation of fluid, and continuous angular acceleration imparted to the processed surface features.
机译:超临界流体清洁系统使用过程流体来操作腔室内的旋转电机,并带有流体轴承和悬浮流体,以旋转工件和叶轮。转速和方向传感器以及原点定位器有助于电机控制。叶轮进一步增加了腔室中流体的搅动,加快了处理速度,并提高了超临界流体成分的均匀性,并增加了流体向处理后表面的传质。离心式夹子和暗盒可容纳晶圆和叶轮。非接触式流体操作旋转机构可减少污染。物理力,旋转力和剪切力通过离心力增强,离心力可引起薄膜的局部沉积或反应的分子产物从表面分离。伴随有流体的搅动,并且连续的角加速度被赋予处理后的表面特征。

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