Patent ID: 9057670
Filing Date: 2015-06-16
Classification: G01N,H01J

Abstract:
1. A method of preparing a transmission electron microscopy (TEM) sample from a semiconductor structure, the method comprising: selecting a sample thickness for the transmission electron microscopy (TEM) sample; milling a region of the semiconductor structure with a focused ion beam and generating the transmission electron microscopy (TEM) sample, wherein during the milling that generates the transmission electron microscopy (TEM) sample having the selected sample thickness, the focused ion beam includes a rotation angle relative to a crystallographic axis corresponding to the semiconductor structure, wherein the rotation angle used to generate the TEM sample is determined based on the selected sample thickness and a length of an image projection region; and generating a transmission electron microscopy image of a cross-sectional plane of the generated transmission electron microscopy (TEM) sample using a transmission electron microscope, wherein the generated transmission electron microscopy image of the cross-sectional plane includes both an image of an image projection-free region and an image of the image projection region, the image of the image projection-free region having an imaged feature of interest associated with the TEM sample that is unobfuscated by an image of another feature associated with the TEM sample, and the image of the image projection region having an imaged feature of interest associated with the TEM sample that is obfuscated by the image of another feature associated with the TEM sample.