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

Claim 4:
5. The method for measuring a film thickness of a semiconductor device according to claim 3, further comprising a method for obtaining the reference spectrogram of the main storage region of the reference semiconductor device, the method comprising:
obtaining a distribution parameter and the thickness parameter of the target film in the main storage region of the reference semiconductor device;
obtaining a second measured spectrogram of the main storage region of the reference semiconductor device;
adjusting a distribution parameter of a substrate in the main storage region of the reference semiconductor device based on the second measured spectrogram by using the distribution parameter and thickness parameter of the target film in the main storage region of the reference semiconductor device as fixed values, obtaining an adjusted second measured spectrogram, and comparing the adjusted second measured spectrogram with a theoretical spectrogram of the main storage region of the reference semiconductor device;
when a similarity between the adjusted second measured spectrogram and the theoretical spectrogram of the main storage region of the reference semiconductor device is greater than a second preset value, using the adjusted second measured spectrogram as the reference spectrogram; and
when the similarity between the adjusted second measured spectrogram and the theoretical spectrogram of the main storage region of the reference semiconductor device is less than the second preset value, continuing to adjust the distribution parameter of the substrate in the main storage region of the reference semiconductor device, until the similarity between the adjusted second measured spectrogram and the theoretical spectrogram of the main storage region of the reference semiconductor device is greater than the second preset value;
wherein, the second preset value is greater than zero and less than or equal to 1.