Patent ID: 11894216
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 9:
10. A method of analyzing a sample in an electron microscope system, comprising:
forming, over a planar substrate, a target film having a thickness of less than a threshold corresponding to a limit for FIB requirements;
forming a supporting film over the target film;
forming a buffer layer over the supporting film, wherein the buffer layer, the supporting film, the target film and the planar substrate are stacked in a direction perpendicular to the planar substrate;
after forming the supporting film and forming the buffer layer, obtaining a FIB sample that includes a portion of the target film and a portion of the supporting film; and
analyzing the obtained portion of the target film in an electron microscope system.