Patent ID: 6694875
Filing Date: 2004-02-24
Classification: B41F,H05K

Abstract:
A screen printing method for printing, with the use of a screen printing apparatus, solder paste on an electrode of a board to be printed, said method comprising:positioning a screen mask onto the board; printing the solder paste supplied onto the screen mask into the screen mask with a squeegee of a print head which moves parallel to the screen mask while being kept in contact with the screen mask, wherein the board is classified into a first area where a value of each of opening sizes of the mask along a direction in which the squeegee moves is smaller than a specified threshold, and a second area where a value of each opening sizes of the mask is not smaller than the threshold, and a speed of the squeegee at the first area is made slower than a speed of the squeegee at the second area; entering data of the first area and the second area into the screen printing apparatus by recognizing the opening sizes of the mask by a visual recognition camera, and entering into the screen printing apparatus data of the squeegee speeds corresponding to the first area and the second area by an operator or a higher-order computer that controls the screen printing apparatus; and switching the squeegee speed between the first and second areas based on the entered data of the first area and the second area by the recognition of the visual recognition camera and the entered data of the squeegee speeds corresponding to the first area and the second area by the operator or the higher-order computer.