The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 2016
Filed:
Sep. 14, 2012
Kouhei Horiuchi, Chikusei, JP;
Michio Uruno, Chikusei, JP;
Hiroaki Takahashi, Chikusei, JP;
Tomoyuki Nakamura, Chikusei, JP;
Mitsuyoshi Shimamura, Chikusei, JP;
Kouhei Horiuchi, Chikusei, JP;
Michio Uruno, Chikusei, JP;
Hiroaki Takahashi, Chikusei, JP;
Tomoyuki Nakamura, Chikusei, JP;
Mitsuyoshi Shimamura, Chikusei, JP;
HITACHI CHEMICAL COMPANY, LTD., Tokyo, JP;
Abstract
An adhesive film includes a film-like adhesive layer and a pair of separators sandwiching the adhesive layer. The outer edges of both separators extend outward beyond the outer edge of the adhesive layer, and a blade is used to form a notch on the adhesive layer side of the heavy release separator, along the outer edge of the adhesive layer. The thickness of the heavy release separator is between 50 μm and 200 μm, the average notch depth is between 5 μm and 45 μm and the standard deviation for the notch depth is no greater than 15 μm. Specifying the notch depth allows complete cutting of the adhesive layer with the blade, while also limiting release problems between the heavy release separator and the adhesive layer.