Patent ID: 11950374
Assignee: KOH YOUNG TECHNOLOGY INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 4:
5. A method performed by an apparatus for compensation of a screen printer including a communication interface that communicates with the screen printer and a solder inspection device, a memory that stores first information associated with each of a plurality of pads on a substrate, and a processor,
the method comprising:
obtaining, by the processor, the first information from the memory, the first information including information associated with at least one selected from a size, a shape, and a location of each of the plurality of pads on the substrate;
obtaining, by the processor, second information associated with each piece of solder paste applied to each of the plurality of pads, from the solder inspection device that measures a state of the solder paste, the second information including information associated with at least one selected from a size, a shape, and a location of each piece of the solder paste applied to each of the plurality of pads;
determining, by the processor, a plurality of first regions on the substrate based on the first information, each of the plurality of first regions corresponding to each of the plurality of pads;
determining, by the processor, a plurality of second regions on the substrate based on the second information, each of the plurality of second regions corresponding to each piece of the solder paste applied to each of the plurality of pads;
determining, by the processor, a plurality of cross regions in which the plurality of first regions and the plurality of second regions overlap each other;
determining, by the processor, a cross area ratio of an entire area of the plurality of cross regions to an entire area of the plurality of first regions;
determining, by the processor, a position correction value that maximizes the cross area ratio;
delivering, by the processor, the position correction value to the screen printer that applies the solder paste to the substrate on which a stencil mask is disposed, the position correction value causing the screen printer to adjust a position of the stencil mask based on the position correction value;
determining, by the processor, a solder-printing pressure correction value and a solder-printing speed correction value for the screen printer based on the first information, the second information and the position correction value; and
delivering, by the processor, the solder-printing pressure correction value and the solder-printing speed correction value to the screen printer, the solder-printing pressure correction value causing the screen printer to adjust a pressure at which the screen printer applies the solder paste to the substrate based on the solder-printing pressure correction value, and the solder-printing speed correction value causing the screen printer to adjust a speed at which the screen printer applies the solder paste to the substrate based on the solder-printing speed correction value,
wherein each of the plurality of pads has a different size and shape.