Patent ID: 9147102
Filing Date: 2015-09-29
Classification: G01B,G01N,G02B,G06K

Abstract:
1. A device for measuring a height of a microscopic structure, the device comprises: a storage circuit arranged to store information that comprises amplitude information and phase information, wherein the stored information is indicative of a shape and a size of the microscopic structure; a mask generation circuit arranged to threshold pixels of the amplitude information to provide a mask that comprises masked amplitude pixels that have amplitude values above an amplitude threshold; a phase information circuit arranged to apply the mask on the phase information to provide masked phase pixels; select, out of the masked phase pixels, selected phase pixels that form a part of the masked phase pixels and correspond to a phase criterion, the selected phase pixels have selected phase pixels attribute values; find, out of the phase information, elected phase pixels that have the selected phase pixel attribute values; and a height calculation circuit arranged to generate a height measurement result based the elected phase pixels.