Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive heat dissipation material having a low thermal expansion coefficient and a high thermal conductivity compatibly, and to provide a method for producing the heat dissipation material. SOLUTION: The heat dissipation material has a composition containing W and/or Mo in addition to Cr and Cu, and in which the total of the W content and/or the Mo content and the Cr content is >30 to 90 mass%, and the balance inevitable impurities, and has a structure where, in addition to a granular Cr phase, a granular W phase and/or a granular Mo phase is dispersed into a Cu phase matrix. As one example of the production method, in addition to Cr and Cu, the powder of W and/or Mo is mixed, thereafter, the mixture is sintered and is cooled at a cooling rate of ≤30°C/min, and the obtained sintered compact is subjected to aging heat treatment in the temperature range of 500 to 750°C. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a metal-wall package or a ceramic-wall package with an economical, a high-roductivitynd a stably supplied heat-dissipatingcomponent for semiconductors as the material. SOLUTION: The heat-dissipation component as a base material is a compact of Cr-Cu alloy plate, manufactured through the cold-press treatment of a Cr-Cu alloy manufactured by the application of a powder-metallurgical method, with a Cr content over 30 mass% and below 80 mass% and remains comprising Cu and unavoidable impurities. The inevitable impurities in the heat-dissipation component contain O: 0.15 mass% or below, N: 0.1 mass% or below, C: 0.1 mass% or below, Al: 0.05 mass% or below, and Si: 0.10 mass% or below. The metal-wall package or the ceramic-wall package contains a heat-dissipating component as the base material, a metallic frame, and a ceramic frame. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a Cr-Cu alloy sheet having characteristics, such as small heat-expanding ratio and large heat-conductivity and restraining the generation of edge-cracking, and a heat-radiating material (such as a heat-radiating sheet for electronic apparatuses, heat-radiating parts for electronic apparatuses) using this alloy sheet. SOLUTION: The Cr-Cu alloy sheet has the composition composed of >30% to 80% Cr and the balance Cu with inevitable impurities, and the fine crack existing on the surface is ≤2.5 pieces/cm 2 . COPYRIGHT: (C)2009,JPO&INPIT