Asahi Kasei Kabushiki Kaisha

Asahi Kasei Microdevices Corporation

Saki Ushida

Motoaki Iwaya

Kazuhiro Nagase

Akira Yoshikawa

There is provided a magnetic detection device including: a substrate including: a hole portion into which a magnet is inserted from a side of one main surface; and a stopper for stopping, from a side of another main surface, the magnet inserted into the hole portion to prevent the magnet from protruding toward the side of the another main surface; and a magnetic sensor mounted at a position corresponding to the hole portion, in the another main surface. The substrate may include a first substrate, and a second substrate bonded to the first substrate from the side of the another main surface. The hole portion may be a first through hole formed in the first substrate. The stopper may include a region, in the second substrate, that closes the first through hole.

Magnetic detection device, magnetic detection unit, magnetic detection system, and method for manufacturing magnetic detection unit

An MSM ultraviolet ray receiving element has a low dark state current value and a good photosensitivity. The MSM ultraviolet ray receiving element has a first nitride semiconductor layer on a substrate, a second nitride semiconductor layer on the first nitride semiconductor layer, and first and second electrodes on the second nitride semiconductor layer. The first nitride semiconductor layer contains AlGaN (0.4&#x2264;X&#x2264;0.90). The second nitride semiconductor layer contains AlGaN with a film thickness t (nm) satisfying 5&#x2264;t&#x2264;25. The first electrode and the second electrode contain a material containing at least three elements of Ti, Al, Au, Ni, V, Mo, Hf, Ta, W, Nb, Zn, Ag, Cr, and Zr. Al composition ratios X and Y and a film thickness t satisfy &#x2212;0.009&#xd7;t+X+0.22&#x2212;0.03&#x2264;Y&#x2264;&#x2212;0.009&#xd7;t+X+0.22+0.03.

Growing community of inventors

Tokyo, Japan

Saki Ushida