公开(公告)号：US20040140797A1

公开(公告)日：2004-07-22

申请号：US10685210

申请日：2003-10-14

申请人： Applied Materials, Inc.

发明人： Lawrence C. Lei ,  Siqing Lu ,  Yu Chang ,  Cecilia Martner ,  Quyen Pham ,  Yu Ping Gu ,  Joel Huston ,  Paul Smith ,  Gabriel Lorimer Miller

IPC分类号： G01B007/06 ,  G01N027/72

CPC分类号： G01B7/105

摘要： A method and apparatus are provided for measuring the thickness of a test object. The apparatus includes an eddy current sensor having first and second sensor heads. The sensor heads are positioned to have a predetermined gap therebetween for passage by at least a portion of the test object through the gap. The sensor heads make measurements at given sampling locations on the test object as the test object is moved through the gap. The apparatus also includes a position sensing mechanism to determine positions of the sampling locations on the test object. The apparatus also includes an evaluation circuit in communication with the eddy current sensor and to the position sensing mechanism for determining the thickness of the test object at the sampling locations.

摘要翻译： 提供了一种用于测量被测物体的厚度的方法和装置。 该装置包括具有第一和第二传感器头的涡流传感器。 传感器头被定位成在其间具有预定的间隙，以通过该测试对象的至少一部分通过间隙。 当测试对象移动穿过间隙时，传感器头在测试对象上的给定采样位置进行测量。 该装置还包括位置检测机构，用于确定测试对象上的采样位置的位置。 该装置还包括与涡流传感器和位置感测机构通信的评估电路，用于确定采样位置处的测试对象的厚度。