Patent ID: 7964924

Claim:
A magneto-resistance effect device, comprising: a semiconductor region having a surface having a plurality of non-magnetic metal particles of a size equal to or smaller than 100 μm, the metal particles being formed of gold or aluminum and isolated from one another at intervals equal to or smaller than 1 μm; a cap layer which is formed of either antimony or gallium arsenide, and said cap layer is covering the semiconductor region and the non-magnetic metal particles so as to directly contact and embed the plurality of the non-magnetic metal particles, and said cap layer and said non-magnetic metal particles comprise a granular structure and said cap layer has a smooth top surface, wherein the antimony or gallium arsenide exists across an entire thickness of the cap layer from the semiconductor region to an opposite surface of the cap layer; and a plurality of electrodes provided on a surface of the cap layer and separated from one another.