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

Claim 10:
11. 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/or 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;
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 image of one or more portions of the film-deposited substrate such that the film is included in the at least one image;
unloading, by the loading-unloading robot, the film-deposited substrate from the load lock chamber; and
analyzing, by at least one controller, the at least one image to determine whether a film over the film-deposited substrate has a defect,
wherein analyzing the at least one image comprises:
defining a target area in pixels of the at least one image;
processing pixel values of the pixels in the target area to divide the pixels into a first group of pixels having the pixel values greater than a predetermined value and a second group of pixels having the pixel values smaller than the predetermined value; and
determining whether the film has a defect based on a ratio of the first group of pixels to the second group of pixels.