Patent ID: 9472459
Filing Date: 2016-10-18
CPC Classification: B28D,H01L

Claim Text:
1. A wafer division method of dividing a wafer, having division start points formed along scheduled division lines, into individual device chips starting from the division start points using a wafer divider, the wafer divider comprising: a placement table; and division means adapted to divide the wafer on the placement table into a plurality of device chips starting from the division start points, wherein the placement table includes a plurality of spherical bodies having same diameter, a container that accommodates the plurality of spherical bodies in close contact with each other, and a placement surface formed by connecting vertices of spherical surfaces of the plurality of spherical bodies that are accommodated in close contact with each other, and the division means includes the wafer division method including an adhesive tape affixing step of affixing an adhesive tape to a rear face of the wafer, a placement step of placing, on the placement table, the wafer to which the adhesive tape has been affixed, and a division step of dividing the wafer placed on the placement table into individual device chips starting from the division start points by pressing the wafer toward the placement surface with the pressing means via the adhesive tape.