The Furukawa Electric Co., Ltd.

Hiromitsu Maruyama

Shinichi Ishiwata

Yasumasa Morishima

Shuzo Taguchi

Masami Aoyama

Noboru Sakuma

The adhesive sheet wound into a roll includes: a long release film; an adhesive layer provided in a label form on the release film; and a pressure-sensitive adhesive film having a label part covering the adhesive layer and provided so as to be in contact with the release film around the adhesive layer and a peripheral part surrounding an outside of the label part, wherein a through hole penetrating the pressure-sensitive adhesive film is provided outside a portion corresponding to a part of the adhesive layer intended to be attached to an adherend and inside the label part, and wherein outer circumference of the adhesive layer&#xd7; 1/43&#x2266;maximum width of the through hole&#xd7;number of the through holes per label part of the pressure-sensitive adhesive film&#x2266;outer circumference of the adhesive layer is satisfied.

Adhesive sheet

An adhesive sheetwound into a roll includes: a long release film; an adhesive layerprovided in a label form on the release film; and a pressure-sensitive adhesive filmhaving a label partcovering the adhesive layerand provided so as to be in contact with the release filmaround the adhesive layerand a peripheral partsurrounding an outside of the label part, wherein a through holepenetrating the release filmis provided in a place including a portion corresponding to an outside of a partof the adhesive layerintended to be attached to an adherend and an inside of the label part

A wafer processing tape includes a release film having a large length; an adhesive layer formed on a first surface of the release film and having a predetermined planar shape; a pressure-sensitive adhesive film having a label portion and a surrounding portion surrounding outside the label portion; and a support member formed on a second surface of the release film opposite to the first surface on which the adhesive layer and the pressure-sensitive adhesive film are formed. The label portion has a predetermined planar shape and covers the adhesive layer so that the label portion contacts with the release film around the adhesive layer. The support member is disposed at both end portions of the release film in a short side direction of the release film. The support member has a coefficient of linear expansion of 300 ppm/&#xb0; C. or less.

Growing community of inventors

Tokyo, Japan

Hiromitsu Maruyama