Nitto-denko Corporation

Kazuaki Mochida

Masaaki Mori

Yuichi Abe

Junichi Moriyama

Nobuharu Kuki

Sunao Inoue

A waterproof member () includes a first adhesive layer (), a second adhesive layer (), and a porous layer (). The porous layer () is disposed between the first adhesive layer () and the second adhesive layer (). The first adhesive layer () and the second adhesive layer () each have a frame shape in plan view. When the first adhesive layer (), the second adhesive layer (), and the porous layer () are seen in plan view, the outer boundary of the porous layer () lies within the outer boundary of the first adhesive layer () and the outer boundary of the second adhesive layer (). The first adhesive layer () is bonded directly to the second adhesive layer () in a region outside the outer boundary of the porous layer (). The porous layer () has a peripheral surface that is shielded from outside by the first adhesive layer () and the second adhesive layer ().

Waterproof member and electronic device including the waterproof member

The present invention provides: a protection member used for preventing a contact between a lens for focusing light on an optical information recording medium and the optical information recording medium upon optically recording or reproducing information on or from the optical information recording medium, the protection member including an ultrahigh molecular weight polyethylene porous film; and an optical pickup device having the protection member.

Growing community of inventors

Osaka, Japan

Kazuaki Mochida