Patent ID: 6820544
Filing Date: 2004-11-23
Classification: B41F,B41P,H05K

Abstract:
A screen printing apparatus for printing paste onto a substrate via pattern apertures of a mask plate by sliding a squeegee head on the mask plate, said squeegee head comprising:(a) a paste storage for storing paste; (b) a pressure applying member for applying pressure to the paste in the paste storage; (c) a paste cell for accommodating the pressurized paste and bringing the paste into contact with a surface of the mask plate via an opening formed on a lower face of the paste cell; (d) a scraper forming a front wall and a rear wall in a squeegee-moving direction, and forming a brim of the opening with a lower end of the scraper contacting a surface of the mask plate, the front and rear walls of the scraper defining front and rear walls of the paste cell; and (e) a paste-shearing member, disposed in the paste cell and between the front and rear walls of the paste cell, the paste-shearing member having a vertical face contacting with the pressurized paste, for shearing the paste flowing down along the contacting face.