Patent ID: 6729834
Filing Date: 2004-05-04
Classification: H01L

Abstract:
A method for centering a wafer in relation to and placing the wafer upon an element mounted for reciprocal movement along an element axis, the wafer including a diameter centered about a central axis, the method comprising the steps of:providing a fixture including a plurality of terraced, concentrically arranged seats having respective diameters centered about a common axis extending through an opening of the fixture, the diameters of the seats being different from one another, the fixture having a gap formed therethrough extending from the opening through a periphery of the fixture; mounting the fixture in a first position adjacent the element such that the fixture axis is substantially coincident with the element axis; positioning the wafer upon one of the seats for supporting the wafer in opposition to the element and for rendering substantially coincident the fixture, element and central axes; moving the element into the opening, thereby engaging and removing the wafer from the fixture, and moving the fixture from the first position to a second position adjacent the element such that the fixture axis is substantially perpendicular to the element axis, thereby allowing the element to pass through the gap.