Abstract: A setter used in sintering and having an oxide coating layer is configured such that oxide powder of at least one of, or a mixture of oxide powders of two or more of alumina, silica, zirconia, yttria, titania, magnesia, and calcia is deposited to at least one surface of a metal composed of molybdenum, tungsten, or an alloy of a molybdenum group and a tungsten group, and a deposition surface thereof allows no exposure of the base material.

Abstract: The present invention provides an economical package for housing semiconductor chip that allows a semiconductor chip to operate normally and stably over long periods by efficiently transferring heat generated during the operation of the semiconductor chip to the package mount substrate.

Abstract: A superabrasive wheel (100, 200) for mirror finishing includes an annular base plate (120, 220) having an annular end surface (121, 221) and a plurality of superabrasive members (110, 210), each having a peripheral end surface (111), arranged along the periphery of the annular base plate (120, 220) at intervals from each other in a circumferential direction and fixed onto the end surface (121, 221) of the base plate (120, 220). Each of the superabrasive members (110, 210) has a flat plate shape, and is so arranged that the peripheral end surface (111) is substantially parallel to the rotary shaft of the superabrasive wheel (100, 200). A surface (113) defined by the thickness of the flat plate shape of each superabrasive member (110, 210) is fixed onto the end surface (121, 221) of the base plate (120, 220). In the superabrasive members (110, 210), superabrasive grains are bonded by a binder of a vitrified bond.