| 摘要 |
A method for manufacturing a power module substrate (10), includes: preparing a ceramics substrate (11) and a metal plate (22, 23) made of pure aluminum; a fusion step in which the ceramics substrate (11) and the metal plate (22, 23) are stacked in layers with a brazing filler metal (24, 25) interposed therebetween, and a fused aluminum layer (26, 27) is formed at an interface between the ceramics substrate (11) and the metal plate (22, 23) by fusing the brazing filler metal (24, 25) which is caused by heating; and a solidifying step in which the fused aluminum layer (26, 27) is solidified by cooling, and a crystal is grown so as to be arranged in a crystal orientation of the metal plate (22, 23) when the fused aluminum layer (26, 27) is solidified. |
