Abstract: The present invention is a production method of an R-T-B-C rare earth alloy (R is at least one element selected from the group consisting of rare earth elements and yttrium, T is a transition metal including iron as a main component, B is boron, and C is carbon). An R-T-B bonded magnet containing a resin component, or an R-T-B sintered magnet with a resin film formed on the surface thereof is prepared, and a solvent alloy containing a rare earth element R and a transition metal element T is prepared. Thereafter, the R-T-B bonded magnet is molten together with the solvent alloy. In this way, a rare earth alloy can be recovered from a spent bonded magnet or a defective one generated in a production process stage, and a rapidly quenched alloy magnet can be obtained. As a result, magnet powder is recovered from the R-T-B magnet, and the recycling of a magnet including a resin component can be realized.

Abstract: A vapor-phase growth method for forming a boron-phosphide-based semiconductor layer on a single-crystal silicon (Si) substrate in a vapor-phase growth reactor. The method includes preliminary feeding of a boron (B)containing gas, a phosphorus (P)-containing gas, and a carrier gas for carrying these gases into a vapor-phase growth reactor to thereby form a film containing boron and phosphorus on the inner wall of the vapor-phase growth reactor; and subsequently vapor-growing a boron-phosphide-based semiconductor layer on a single-crystal silicon substrate. Also disclosed is a boron-phosphide-based semiconductor layer prepared by the vapor-phase growth method.

Abstract: A cover apparatus of a cassette tape recorder comprising first and second covers rotatable to be openable and closable with respect to a body of the tape recorder. The first cover has a holder to encasing a tape cassette so that the tape cassette encased in the holder is rotatable in accordance with the rotation of the first cover, a length of the first cover in longitudinal directions being smaller than that of the tape cassette so that a portion of the tape cassette protrudes from the first cover when being encased in the holder. The second cover is arranged to be engaged with the first cover to be rotatable together with the first cover and movable along a surface of the first cover.

Abstract: A cover apparatus of a cassette tape recorder comprising first and second covers rotatable to be openable and closable with respect to a body of the tape recorder, the first cover having a holder to encase a tape cassette so that the tape cassette encased in the cassette holder is rotatable in accordance with the rotation of the first cover. The first and second covers are coupled to each other through a slider engaged with the second cover and slidable along a side surface of the first cover. The first cover rotates to cover the entire tape cassette in cooperation with the second cover when the second cover is closed with respect to the tape recorder body.