Substrate for power module, production manner of power module and substrate for power module

摘要

PPROBLEM TO BE SOLVED: To provide a power module substrate where a metal plate is reliably joined to a ceramics substrate and heat cycle reliability is high, and also to provide a power module including the power module substrate and a method of manufacturing the power module substrate. PSOLUTION: In the power module substrate, the metal plates 12, 13 made of pure aluminum are joined onto the surface of the ceramics substrate 11 made of AlSB2/SBOSB3/SB. On a junction interface 30 between the metal plates 11, 12 and the ceramics substrate 11, a Cu high concentration section 32, which has Cu concentration at least two times larger than that in the metal plates 12, 13, is formed. PCOPYRIGHT: (C)2011,JPO&INPIT