Tdk Corporation

Emiko Yoshimura

Masahiro Shinkai

Kenryo Namba

Atsushi Monden

Sumiko Kitagawa

Takahiko Suzuki

Shin-ichi Tezuka

The invention provides an optical recording medium comprising at least two recording layers containing a dye. At least two layers of the recording layers have different optical constants, and at least one among these recording layers having different optical constants contains a dye which forms a thin film having an absorption spectrum whose half-value width is up to 170 nm. This construction permits the medium to be written and read in a conventional wavelength range of about 780 nm and a shorter wavelength range of about 630-680 nm.

Optical recording medium

A humidity sensor includes a pair of opposed electrodes disposed on an insulating substrate and defining a gap therebetween and a humidity sensitive thin film covering the gap. This thin film is formed by coating a polymer of specific structure having an ethylenically unsaturated reactive group and exposing the coating to ultraviolet radiation for crosslinking. The sensor is fully water resistant and produces accurate outputs over a wide humidity range and thus can detect and determine moisture in the surrounding atmosphere.

Humidity sensor and method for making

Growing community of inventors

Chiba, Japan

Emiko Yoshimura