Abstract:
PROBLEM TO BE SOLVED: To provide a Cr-Cu alloy for a conducting member for an electronic component having a low thermal expansion coefficient and high electric conductivity. SOLUTION: The Cr-Cu alloy having a flattened Cr phase has a composition comprising 30 to 80 mass% Cr, and in which the intrusion of O, N, C, Al and Si as inevitable impurities is suppressed to ≤0.08 mass% O, ≤0.03 mass% N, ≤0.03 mass% C, ≤0.05 mass% Al and ≤0.10 mass% Si, respectively, and further has a layered structure where the aspect ratio of the flattened Cr phase is >10, and also, the number density in the thickness direction of the Cr phase is 10 to 1,000 pieces/mm, and in which variation in electric conductivity is suppressed to ±10% as well. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for inexpensively producing a copper alloy having a satisfactory flatness which is suitable as the stock for a heat radiation sheet having compatibility between a low thermal expansion coefficient and a high thermal conductivity rate, and also having excellent workability. SOLUTION: First cold rolling where the roll spacing between rolling rolls is set to a prescribed value, and a copper alloy sheet is subjected to thickness reduction is performed one time, and thereafter, first temper rolling is performed one or more times at the roll spacing same as that in the first cold rolling, and next, second cold rolling where the roll spacing is reduced and the copper alloy sheet is subjected to thickness reduction is performed for one time, and subsequently, second temper rolling is performed one or more times at the roll spacing same as that in the second cold rolling. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a Cr-Cu alloy which has a small coefficient of thermal expansion in a surface direction, has a large coefficient of thermal conductivity, further keeps a low coefficient of thermal expansion even after having been heated to a high temperature for bonding, and besides, has superior workability; a manufacturing method therefor; further a radiation plate with the use of the Cr-Cu alloy for a semiconductor; and radiation parts with the use of the Cr-Cu alloy for a semiconductor. SOLUTION: The Cr-Cu alloy comprises a Cu matrix and flat Cr phases; is obtained by powder metallurgy; and includes Cr of more than 30 mass% but 80 mass% or less. The flat Cr phases have an average aspect ratio of more than 1.0 but less than 100. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a tool for shielding a radiation such as a syringe for a radioactive chemical, a shielding container for a radioactive solution and a component for shielding the radiation, capable of holding surface grossiness for a long period even when contaminated with the chemical, a dirt from hands or the like. SOLUTION: This tool for shielding the radiation is formed of a powder sintered body constituted of components of tungsten, nickel and molybdenum, and containing 89-98 mass% of tungsten, to provide excellent radiation shielding ability and an excellent corrosion preventive effect. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive alloy material for heat radiation having a coefficient of thermal expansion similar to that of composite material, high thermal conductivity similar to that of pure copper, and also having excellent machinability, to provide a production method therefor, and further to provide a production method using a powder sintering process, in addition to the conventional dissolution process, by which alloy materials for heat radiation with various shapes can be supplied at a low production cost in order to meet particularly the need of various shapes as those of alloy materials for heat radiation. SOLUTION: The Cu-Cr alloy comprises, by mass, 0.3 to 80% C, and the balance Cu with inevitable impurities, and has a structure where a granular Cr phase having a major axis of ≤100 nm and an aspect ratio of 2 . COPYRIGHT: (C)2006,JPO&NCIPI