Hollow laminate and heat sink using the same

摘要

A hollow laminate which is prepared by forming hollow portions of a predetermined shape on opposed faces of a plurality of metal plates, subjecting the joining faces of the metal plates to an activation treatment under an extremely reduced pressure, and then laminating the metal plates having hollow portions and joining them by cold pressure welding; and a heat sink which is prepared by enclosing water as a heat radiating hydraulic fluid in the hollow portion of the hollow laminate