Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Mayekawa Mfg. Co., Ltd.

Toru Ota

Masayoshi Takemi

Chikara Watatani

Naoya Hiruma

Takashi Nagira

Shiro Ryochiku

To provide a cooling device that can refrigerate foods and stably maintain high humidity without being limited by a region and a period. A cooling device includes a heat exchange unit that performs heat exchange between a refrigerant circulating in a freezer and air circulating in a box and an adjusting unit that maintains a state in which moisture adheres to heat transfer units of the heat exchange unit.

Cooling device and cooling method including high humidity storage area and adjustable fan

The method for manufacturing a semiconductor laser element according to the present invention has the steps of: forming a semiconductor laminated structure having an active layer composed of a semiconductor material containing Al; etching the semiconductor laminated structure to form a mesa; forming a first burying layer at a first growing temperature so as to coat the side of the mesa; and forming a second burying layer at a second growing temperature higher than the first growing temperature on the first burying layer to bury the circumference of the mesa.

Method for manufacturing semiconductor laser element

A semiconductor laser device includes an n type diffraction grating layer of n-InGaAsP on an n-InP substrate, and having through-holes periodically disposed alongside of one another in a laser optical waveguide direction, an n-InP layer containing S as a dopant impurity in a concentration of at least 1&#xd7;10cm. The through holes are buried in the n-InP layer, and an active layer is disposed on both the n-InP layer and the diffraction grating layer through an n-InP cladding layer.

Semiconductor laser device

Growing community of inventors

Tokyo, Japan

Toru Ota