Abstract:
PROBLEM TO BE SOLVED: To provide a high-precision heat radiating component for a semiconductor in which a manufacturing process is simple, and which is economical and has high productivity by using a Cr-Cu alloy which has a small coefficient of thermal expansion and large coefficient of thermal conductivity, and to provide a semiconductor case, a semiconductor carrier and a package.SOLUTION: A heat radiating component for a semiconductor is a molded product produced by cold pressing a Cr-Cu alloy plate obtained by processing a Cr-Cu alloy which is produced by applying powder metallurgy. The molded product comprises more than 30 mass% and less than or equal to 80 mass% of Cr content with the balance consisting of Cu and unavoidable impurities. The unavoidable impurities are less than or equal to 0.15 mass% of O, less than or equal to 0.1 mass% of N, less than or equal to 0.1 mass% of C, less than or equal to 0.05 mass% of Al, and less than or equal to 0.10 mass% of Si.
Abstract:
PROBLEM TO BE SOLVED: To provide a production method which can prevent edge cracks of a Cr-Cu alloy sheet having characteristics such that the coefficient of thermal expansion is low and also thermal conductivity is high. SOLUTION: In the method for producing a Cr-Cu alloy sheet, a Cr-Cu alloy stock comprising, by mass, >30 to ≤80% Cr, and the balance Cu with inevitable impurities is subjected to warm rolling in the temperature range of 40 to 300°C. Alternatively, in the production method, Cu is infiltrated into a porous body obtained by sintering Cr powder and Cu powder to make a Cr-Cu alloy stock, and it is subjected to warm rolling to obtain a Cr-Cu alloy sheet. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of joining a DBA substrate and a heat radiating member by brazing or by soldering, and also a heat radiator plate manufactured by the joining method. SOLUTION: A Cu plate or a Cu-contained alloy is joined to a foil or a particle-like Sn-based alloy by inserting the foil or the particle-like Sn-based alloy between the Cu or the Cu-contained alloy, and heating the alloys at a temperature not lower than the melting point of the Sn-based alloy. COPYRIGHT: (C)2007,JPO&INPIT