Patent ID: 6019664
Filing Date: 2000-02-01
Classification: G01B

Abstract:
A height gauge device used for a wafer back-grinding machine, and said back-grinding machine including a cooling water pipe; said height gauge device mounted under said cooling water pipe and comprising:a height gauge box filled fully with an oil substance and including a signal sensor;a measuring rod including a measuring end, a fulcrum and a sensing end; said falcrum mounted in said height gauge box; said sensing end and said signal sensor being connected together, and said measuring end extended out of said height gauge box;a L-shaped linking rod including a first end, a second end and an elbow portion; said first end connected with said measuring end, and said second end mounted with a probing needle;a cylinder mounted under said height gauge box, and front end of said cylinder having a pushing bar being opposite to said elbow portion of said L-shaped linking rod; anda resilient member connected between said first end of said L-shaped linking rod and said cooling water pipe.