Patent ID: 9377286
Filing Date: 2016-06-28
CPC Classification: G01B,G01R,H01L

Claim Text:
1. A device for globally measuring a thickness of a metal film, comprising: a base; a rotating unit comprising a fixed member fixed on the base and a rotating member having a rotating joint; a working table fixed on the rotating member and having a vacuum passage which is formed therein and connected with the rotating joint; a linear driving unit including a guide rail fixed on the base and a sliding block slidable along the guide rail; a cantilever beam defining a first end hinged to the sliding block and a second end; an electromagnet fixed on the sliding block; an iron block fixed on a lower surface of the first end of the cantilever beam and opposed to the electromagnet; a measuring head connected to the second end of the cantilever beam, facing a surface of the working table, and having an eddy current probe disposed therein, a vertical vent hole, and a vertical throttling hole, the vertical vent hole and the vertical throttling hole are communicated coaxially such that they penetrate the measuring head.