Patent ID: 6170165
Filing Date: 2001-01-09
Classification: G01B,H01L

Abstract:
An apparatus for measuring a gap between two opposing surfaces comprising:a mounting block having smooth top and bottom surfaces that are parallel to each other,a shaft mounted to said top surface at a first end of said shaft and extending upwardly from said top surface to a second end of said shaft,an extension arm having a first end connected to said second end of the shaft and a second end extending horizontally away from said mounting block,a dial gauge having a dial and a retractable shaft with a tip portion for contacting a surface to be measured, said dial being connected to the second end of said extension arm such that said retractable shaft is pointed downwardly toward a surface to be measured, anda calibration block having a thickness for zeroing the dial gauge such that the gauge is ready for measuring a surface and determine its deviation from a gap equal to said thickness of the block.