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

Claim 0:
1. An apparatus for compensation of a screen printer that applies solder paste to a substrate on which a stencil mask is disposed, the apparatus comprising:
a communication interface that communicates with the screen printer and a solder inspection device that measures a state of the solder paste applied to the substrate;
a memory that stores first information associated with each of a plurality of pads on the substrate, 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; and
a processor configured to:
obtain the first information from the memory;
control the communication interface to obtain second information associated with each piece of the solder paste applied to each of the plurality of pads from the solder inspection device, 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;
determine 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;
determine 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;
determine a plurality of cross regions in which the plurality of first regions and the plurality of second regions overlap each other;
determine a cross area ratio of an entire area of the plurality of cross regions to an entire area of the plurality of first regions;
determine a position correction value that maximizes the cross area ratio;
control the communication interface to deliver the position correction value to the screen printer, the position correction value causing the screen printer to adjust a position of the stencil mask based on the position correction value;
determine 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
control the communication interface to deliver 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.