Patent ID: 6283355
Filing Date: 2001-09-04
Classification: H01L

Abstract:
A tower for holding components of an end effector, wherein the components are to be accurately held relative to each other, the tower comprising:column having a plurality of grooves formed therein, each of the grooves being dimensioned to receive one of the components and defining a ledge so that the plurality of grooves define a plurality of ledges along the column;the column having a base provided with a reference ledge to define a reference surface;a first of additional ledges being spaced by a selected distance from the reference surface;successive ones of the additional ledges being spaced from the reference surface by a uniformly increasing multiple of the selected distance so that the plurality of additional ledges are evenly and accurately spaced from the reference surface; wherein the components are spatulas for holding wafers for semiconductor processing, the spatulas having edges that intersect at a given angle, the tower further having,the column being formed from a plurality of walls, wherein each of the walls extends away from the reference surface and is substantially planar; andthe walls intersecting to define an intersection at a tower angle substantially the same as the given angle.