Patent ID: 6080991
Filing Date: 2000-06-27
Classification: G01N,H01J

Abstract:
A method for milling a transmission electron microscope (TEM) test slice by using an energetic particle beam (EPB) to bombard it, the method comprising:milling the TEM test slice to have a profile with a slanting angle against a normal line;tilting the TEM test slice by a first tilt angle against a normal line, wherein the first tilt angle is substantial equal to the slanting angle;milling the TEM test slice to form a first TEM observable wall by adjusting an EPB incident angle onto the TEM test slice, wherein the first TEM observable wall is parallel to the normal line;tilting the TEM test slice by a second tilt angle against a normal line, wherein the second tilt angle is substantial equal to the slanting angle and in opposite direction of the first tilt angle;milling the TEM test slice to form a second TEM observable wall by adjusting an EPB incident angle onto the TEM test slice, wherein the second TEM observable wall is parallel to the normal line; andrepeating above steps until a desired thickness of the first and the second TEM observable wall is achieved so that the desired thickness is substantially uniform.