Patent ID: 11867497
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for measuring a film thickness of a semiconductor device, the semiconductor device comprising a substrate and a target film disposed on the substrate, the semiconductor device having a main storage region, the method comprising:
providing a reference spectrogram of a main storage region of a reference semiconductor device;
obtaining a first measured spectrogram of a main storage region of a semiconductor device to be measured;
adjusting a thickness parameter of a target film in the main storage region of the reference semiconductor device within a preset range based on the reference spectrogram, obtaining an adjusted reference spectrogram, and comparing the first measured spectrogram with the adjusted reference spectrogram;
when a similarity between the first measured spectrogram and the adjusted reference spectrogram is greater than a first preset value, using a thickness parameter corresponding to the adjusted reference spectrogram as a thickness of a target film in the main storage region of the semiconductor device to be measured; and
when the similarity between the first measured spectrogram and the adjusted reference spectrogram is less than the first preset value, continuing to adjust the thickness parameter of the target film in the main storage region of the reference semiconductor device within the preset range, until the similarity between the first measured spectrogram and the adjusted reference spectrogram is greater than the first preset value;
wherein, the first preset value is greater than zero and less than or equal to 1.