Patent ID: 11919288
Assignee: DOWA METALTECH CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A method for producing a heat radiation member comprising charging a molten metal of aluminum or an aluminum alloy in a cast mold having a carbon material having a following property (A) disposed therein, so as to fill a space inside the cast mold with the molten metal, and then solidifying the molten metal, so as to form a laminated structure including a metal material containing aluminum or an aluminum alloy and the carbon material bonded to each other;
(A) in pressurizing one principal surface of a plate specimen having a thickness of 11 mm of the carbon material with nitrogen gas of 200 kPa, the carbon material having a gas permeability of the nitrogen gas permeating to the other principal surface with a flow rate of 5 L/min or more and 30 L/min or less per 0.01 m2 in terms of area of the pressurized principal surface, the pressurized principal surface having an area of 0.005 m2 or more.