Abstract: A corrugated fin of a heat exchanger is formed such that fin sections are joined together one after another in a tube axial direction of a plurality of flat heat-transfer tubes. Louvers in the fin sections of the corrugated fin are divided into a first louver group formed further upstream in a direction of flow of air than a drain slit in the corrugated fin and a second louver group formed further downstream in the direction of flow of air than the drain slit. Plate portions of the first louver group and plate portions of the second louver group are inclined to a flat-plate portion in the fin sections and inclined in respective directions that are opposite to each other. The drain slit includes a plurality of drain slits provided in a plurality of respective rows between the first louver group and the second louver group.

Abstract: A heat exchanger includes a plurality of flat heat-transfer tubes and a corrugated fin placed between the plurality of flat heat-transfer tubes. Louvers in fin sections of the corrugated fin are divided into a first louver group formed further upstream in a direction of flow of air than a drain slit in the corrugated fin and a second louver group formed further downstream in the direction of flow of air than the drain slit. Plate portions of the first louver group and plate portions of the second louver group are inclined to a flat-plate portion in the fin sections and inclined in respective directions that are opposite to each other. The drain slit includes a plurality of drain slits formed between the first louver group and the second louver group at an interval in the direction of flow of air.

Abstract: There is disclosed a sputtering target material for producing an intermediate layer film of a perpendicular magnetic recording medium, which is capable of dramatically reducing the crystal grain size of a thin film formed by sputtering. The sputtering target material comprises, in at %, 1 to 20% of W; 0.1 to 10% in total of one or more elements selected from the group consisting of P, Zr, Si and B; and balance Ni.

Abstract: There is provided a soft magnetic alloy for a perpendicular magnetic recording medium having a low coercive force, high amorphous properties, high corrosion resistance, and a high hardness; and a sputtering target for producing a thin film of the alloy. The alloy comprises in at. %: 6 to 20% in total of one or two of Zr and Hf; 1 to 20% of B; and 0 to 7% in total of one or two or more of Ti, V, Nb, Ta, Cr, Mo, W, Ni, Al, Si, and P; and the balance Co and/or Fe and unavoidable impurities. The alloy further satisfies 6?2×(Zr%+Hf%)?B%?16 and 0?Fe%/(Fe%+Co%)<0.20.

Abstract: There is provided a soft magnetic alloy for a perpendicular magnetic recording medium having a low coercive force, high amorphous properties, high corrosion resistance, and a high hardness; and a sputtering target for producing a thin film of the alloy. The alloy comprises in at. %: 6 to 20% in total of one or two of Zr and Hf; 1 to 20% of B; and 0 to 7% in total of one or two or more of Ti, V, Nb, Ta, Cr, Mo, W, Ni, Al, Si, and P; and the balance Co and/or Fe and unavoidable impurities. The alloy further satisfies 6?2×(Zr%+Hf%)?B%?16 and 0?Fe%/(Fe%+Co%)<0.20.

Abstract: There is disclosed a sputtering target material for producing an intermediate layer film of a perpendicular magnetic recording medium, which is capable of dramatically reducing the crystal grain size of a thin film formed by sputtering. The sputtering target material comprises, in at %, 1 to 20% of W; 0.1 to 10% in total of one or more elements selected from the group consisting of P, Zr, Si and B; and balance Ni.