Abstract: A method is provided for producing an insulating circuit substrate with a heat sink including an insulating circuit substrate and a heat sink, the insulating circuit substrate including a circuit layer and a metal layer that are formed on an insulating layer, and the heat sink being bonded to the metal layer side. The method includes: an aluminum bonding layer forming step of forming an aluminum bonding layer formed of aluminum or an aluminum alloy having a solidus temperature of 650° C. or lower on the metal layer; and a heat sink bonding step of laminating a copper bonding material formed of copper or a copper alloy between the aluminum bonding layer and the heat sink and bonding the aluminum bonding layer, the copper bonding material, and the heat sink to each other by solid phase diffusion bonding.

Abstract: A method for producing a bonded body includes: a laminating step of forming a laminated body in which a first member and a second member are temporarily bonded to each other by providing a temporary bonding material including an organic material on at least one of a bonding surface of the first member and a bonding surface of the second member; and a bonding step of pressurizing and heating the laminated body in a laminating direction and bonding the first member and the second member to each other. In the bonding step, during a temperature increase process of heating the laminated body up to a predetermined bonding temperature, at least a pressurization load P2 at a decomposition temperature TD of the organic material included in the temporary bonding material is lower than a pressurization load P1 at the bonding temperature.

Abstract: A method is provided for producing an insulating circuit substrate with a heat sink including an insulating circuit substrate and a heat sink, the insulating circuit substrate including a circuit layer and a metal layer that are formed on an insulating layer, and the heat sink being bonded to the metal layer side. The method includes: an aluminum bonding layer forming step of forming an aluminum bonding layer formed of aluminum or an aluminum alloy having a solidus temperature of 650° C. or lower on the metal layer; and a heat sink bonding step of laminating a copper bonding material formed of copper or a copper alloy between the aluminum bonding layer and the heat sink and bonding the aluminum bonding layer, the copper bonding material, and the heat sink to each other by solid phase diffusion bonding.

Abstract: A method for producing a bonded body includes: a laminating step of forming a laminated body in which a first member and a second member are temporarily bonded to each other by providing a temporary bonding material including an organic material on at least one of a bonding surface of the first member and a bonding surface of the second member; and a bonding step of pressurizing and heating the laminated body in a laminating direction and bonding the first member and the second member to each other. In the bonding step, during a temperature increase process of heating the laminated body up to a predetermined bonding temperature, at least a pressurization load P2 at a decomposition temperature TD of the organic material included in the temporary bonding material is lower than a pressurization load P1 at the bonding temperature.