Patent ID: 9076832
Filing Date: 2015-07-07
Classification: C09J,H01L,Y10T

Abstract:
1. A wafer processing tape having a pasting region to be pasted to a wafer ring used when processing a semiconductor wafer, the wafer processing tape comprising: a release base material constituting a base of the tape; an adhesive layer provided on one surface of the release base material so as to correspond to a planar shape of the semiconductor wafer; a tacky material layer provided so as to cover the adhesive layer; and a base material film provided so as to cover the tacky material layer, wherein: in a plan view, regions of the tacky material layer and the base material film protruding outward from the adhesive layer serve as the pasting region to the wafer ring, in the plan view, at least one notched part is formed entirely outside the adhesive layer, in the base material film and the tacky material layer in the pasting region, to a depth reaching the release base material from the side of the base material film, the notched part being spaced inwardly from an outer perimeter of the pasting region, and in the plan view, a part of the tacky material layer and the base material film in the pasting region is partitioned by the notched part into: (a) a first portion nearer than the notched part to the center of the adhesive layer, and (b) a second portion more distant than the notched part from the center of the adhesive layer but continuous with the first portion around the notched part, and having a flap bounded by the notched part so as to be embraced by the notched part and to protrude toward the center of the adhesive layer.