Patent ID: 7886798
Filing Date: 2011-02-15
Classification: H01L,Y10T

Abstract:
1. An expanding device for expanding an adhesive sheet with respect to a plate-like article stuck to said adhesive sheet, mounted to a ring-shaped frame through said adhesive sheet, and diced into individual chips, after the dicing to increase spacings between the individual chips, said expanding device comprising: a conveying device which conveys said plate-like article from a dicing area to a different area without said plate-like article being detached from a chuck stage after the dicing of said plate-like article; an expanding device which expands said adhesive sheet with said plate-like article being mounted to said frame; and an expansion maintaining device which maintains an expanded state of said adhesive sheet with the spacings between individual chips unchanged and with said plate-like article being mounted to the frame, wherein said expanding device includes: a ring-shaped pressure member which is movable perpendicular to the adhesive sheet and placed near a circumference of the adhesive sheet on which the frame and the wafer plate-like article are not stuck; a ring-shaped housing having an annular groove sized for receiving the pressure member, the ring-shaped housing being movable perpendicular to the adhesive sheet and being positioned facing the pressure member and intercalated adhesive sheet; a driver which is adapted to drive the ring-shaped housing to abut against the adhesive sheet and to drive the ring-shaped pressing member into the groove in the ring-shaped housing pushing the adhesive sheet therewith to form the adhesive sheet with an annular protrusion surrounding the chips and which is also adapted to drive the ring-shaped pressure member to remove it from the groove with the annular protrusion left in the groove until the annular protrusion is pinched and secured, and a pressure reducing device which is adapted for reducing pressure in the groove of the ring-shaped housing and for sucking the annular protrusion of the adhesive sheet into the groove so as to retain the protrusion in the groove with the ring-shaped pressing member removed, and said expansion maintaining device is adapted for expanding pinching and securing a base of said annular protrusion to maintain the expanded state of said adhesive sheet.