Patent ID: 6710867
Filing Date: 2004-03-23
Classification: G01B,G01N,H05K

Abstract:
A device for inspecting a three-dimensional surface structure of a substantially flat test piece, the device comprising:an optical sensor operable to detect, in three-dimensions, at least a partial area of the surface of the test piece; a positioning device operable to position said optical sensor and the test piece relative to one another; a first memory operable to store setpoint values associated with geometric properties of the surface structure; a second memory operable to store tolerance values indicating a relative tolerance range for the geometric properties; an arithmetic logic unit operable to calculate limit values of an absolute tolerance range; a display unit operable to display a defect if a measured value of at least one of the geometric properties of at least one of the inspected surface structures does not fall within a respective range of the absolute tolerance range; outputting means for outputting the measured value corresponding to one of the geometric properties of an inspected surface structure; and input means for inputting information regarding whether a measured value of a geometric property that does not fall within the absolute tolerance range should be evaluated as a defect; wherein the arithmetic logic unit is configured such that when the measured value is not evaluated as a defect, the absolute tolerance range of the geometric property is adjusted corresponding to the measured value.