Patent ID: 11901202
Assignee: JNK TECH
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC G  H

Claim 16:
17. A method of depositing a film on a substrate, the method comprising:
providing a film deposition apparatus comprising:
a load lock chamber configured to receive and clamp a substrate,
a deposition chamber configured to deposit a film over the substrate to output a film-deposited substrate,
a transfer robot configured to move the substrate and the film-deposited substrate between the load lock chamber and the deposition chamber, and
one or more cameras attached to an exterior of the load lock chamber and configured to capture at least one image of the substrate and the film-deposited substrate disposed inside the load lock chamber;

loading the substrate, using a loading-unloading robot, from an outside of the load lock chamber to an inside of the load lock chamber to place the substrate in the load lock chamber;
capturing, by the one or more cameras, at least one first image of one or more portions of the substrate;
analyzing the at least one first image;
clamping the substrate in the load lock chamber;
capturing, by the one or more cameras, at least one second image of the one or more portions of the substrate;
analyzing the at least one second image;
moving the substrate, by the transfer robot, from the load lock chamber to the deposition chamber;
depositing a film over the substrate in the deposition chamber to output the film-deposited substrate;
moving the film-deposited substrate, by the transfer robot, from the deposition chamber to the load lock chamber to place the film-deposited substrate in the load lock chamber;
capturing, by the one or more cameras, at least one third image of the one or more portions of the film-deposited substrate placed in the load lock chamber such that the film is included in the at least one third image;
analyzing the at least one third image;
unloading, by the loading-unloading robot, the film-deposited substrate from the load lock chamber;
analyzing, by at least one controller, the at least one third image to determine whether a film over the film-deposited substrate has a defect; and
displaying the at least one third image and analysis results on a display,
wherein analyzing the at least one third image comprises:
obtaining pixel values of pixels in the at least one third image; and
defining a target area in the pixels of the at least one image;
processing the pixel values of the pixels in the target area to define a width of an edge of the film; and
determining whether the width of the edge of the film is greater than a threshold to determine whether the film has a defect.