Apparatus and method for calibrating a fluid dispenser

A system comprising:

• one or more computer-readable media;
• and
• one or more processors in communication with the one or more computer-readable media, wherein the one or more processors and the one or more computer-readable media are configured to cause the system to perform operations comprising:
• obtaining an image of a substrate including a film, the film formed on the substrate by curing formable material deposited on the substrate by a first dispenser and a second dispenser, the first dispenser depositing drops of the formable material on a first portion of the substrate from a group of nozzles of the first dispenser based on a target volume, the second dispenser depositing drops of the formable material on a second portion of the substrate from a group of nozzles of the second dispenser based on the target volume, the second portion of the substrate different from the first portion of the substrate;
• obtaining intensity information for pixels of the image of the substrate, the intensity information including first intensity data corresponding to the first portion of the substrate and second intensity data corresponding to the second portion of the substrate;
• determining a difference between first intensity values corresponding to a region of the substrate and second intensity values corresponding to the region of the substrate, the first intensity values comprising intensity values of the first intensity data, the second intensity values comprising intensity values of the second intensity data, wherein the region of the substrate is associated with a target thickness for the film on the substrate;
• determining that the difference between the first intensity values and the second intensity values exceeds a threshold;
• determining a first adjustment amount for the group of nozzles of the first dispenser based on the first intensity values and a second adjustment amount for the group of nozzles of the second dispenser based on the second intensity values;
• and
• adjusting one or both of a drop volume and a drop density for the group of nozzles of the first dispenser based on the first adjustment amount and one or both of a drop volume and a drop density for the group of nozzles of the second dispenser based on the second adjustment amount.