Patent ID: 7726715
Filing Date: 2010-06-01
Classification: B25B,B25J,B65G,B65H,H01L

Abstract:
1. A vacuum suction head for vacuum-sucking a substrate, comprising: a vacuum suction pad including a suction part having a plurality of independent protruded portions and recessed portions formed on a surface thereof, an airtight part annularly formed in a peripheral position of said suction part, a groove part providing a passage for discharging air from said suction part, and an opening enclosed by said airtight part for discharging the air from said groove part to the outside; and a skirt pad formed so as to take in said vacuum suction pad, said skirt pad blocking outside air from a peripheral space of said vacuum suction pad when said vacuum suction pad comes close to a substrate to be sucked, wherein said skirt pad comprises: a plate part, said plate part supporting said suction part; an annular part formed of a thick annular shape on an outer edge of said plate part, said annular part surrounding a peripheral portion of said vacuum suction pad to define an inner space between said annular part and said vacuum suction pad; and a skirt part formed of a conically annular shape, said skirt part having a thickness smaller than thickness of a peripheral portion of said annular part, said annular part and said plate part defining a slit for communicating outside of said annular part with said inner space, whereby air passes from said outside into said inner space when a pressure difference exists between said outside and said inner space, said annular part having an annular part bottom surface, said vacuum suction pad having a bottom suction pad surface, said annular part bottom surface being formed at a position that is higher than a position of said bottom suction pad surface such that said slit remains permanently open.