摘要:
A copper alloy obtained by preparing a blank of an alloy that consists of 1.0-3.0% Ni, 0.5-1.5% Ti (the ratio of Ni/Ti in weight percent being in the range of 1-3), 0.1-2.0% Zn, 0.01-0.5% Mg, no more than 50 ppm of oxygen, and the balance being Cu and incidental impurities, all percents being on a weight basis; and reducing the thickness thereof to the final value by cold rolling, wherein at least one cycle of solution heat-treatment is applied at a temperature of not lower than 900.degree. C., followed by quenching with water with no more than 50% reduction in plate thickness being attained to the final value subsequent to the final solution heat-treatment, and at least one cycle of aging treatment is applied at a temperature of 500.degree.-600.degree. C. for a period of 5-720 minutes at a stage during the period from the final solution heat-treatment to the cold rolling effected to attain the final plate thickness, has high strength, high elasticity and good electrical conductivity and exhibits good bending properties, high reliability in plating and high resistance to stress relaxation and, therefore, is suitable for use in terminals in wiring harnesses installed in electrical automotive parts.
摘要:
A non-oxide ceramic material such as aluminum nitride can be metallized with copper by directly bonding a thin sheet of copper to a substrate of the non-oxide ceramic material instead of using a conventional manner in which a paste comprising a powder of copper and a binder is applied to a ceramic substrate by printing. This metallization is effected by placing the non-oxide ceramic material either in contact with or in close proximity to copper containing a copper oxide, followed by heating them in a non-oxidizing atmosphere at a temperature lower than the melting point of copper, but at which the dissociation of the copper oxide contained in copper can occur, so as to dissociate at least part of the copper oxide into metallic copper and oxygen to thereby provide a strong bondage between the surfaces of said non-oxide ceramic material and copper. The metallized non-oxide ceramic material can be used as a substrate for use in IC devices.
摘要:
A novel method for directly bonding a copper plate to an alumina substrate is disclosed. Also disclosed is a process by which bonded assembles of copper plate and alumina substrate can be produced in large volumes on an industrial scale in high yield and at low cost employing a simplified sequence of steps. According to this process, a copper plate is positioned in contact with an alumina substrate in an inert atmosphere, and the combination is heated to a temperature lower than the melting point of copper (1,083.degree. C.), preferably to a temperature lower than the eutectic point of copper-copper oxide eutectic, for example, to 1,063.degree. C..+-.0.5.degree. C., so that a compound of copper with alumina on the surface of the alumina substrate and a compound of copper with at least one glass forming material on said surface are formed without forming the liquidus eutectic of copper and copper oxide in the area of contact between the copper plate and the alumina substrate, and thereafter the combination is cooled to establish direct bond between the two members. Also disclosed herein are specific techniques that may be employed to produce bonded assemblies in large quantities by the present invention using an industrial conveyor furnace, such as those concerning the method of positioning the combination of copper plates and alumina substrates to be charged into the furnace, the temperature in the furnace and the atmosphere therein.