Patent ID: 8334465

Claim:
A laminated device, comprising: a first substrate having a first surface upon which is mounted a first join structure; a second substrate having a second surface upon which is mounted a second join structure; and a low-melting point metal providing a mechanism to laminate together said first substrate and said second substrate by melting together said first join structure and said second join structure upon an application of heat, so that said first surface and said second surface are adjacent, said first join structure including a first conductive film, a protrusion portion and a first metal, said protrusion portion being positioned on said first conductive film, said first metal covering an upper surface and a side surface of said protrusion portion and a part of said first conductive film, said first metal having a first top surface and a second top surface, said first top surface being higher than said second top surface from said first conductive film, said first metal having a melting point higher than said low-melting point, said second join structure including a second conductive film and a second metal, said second metal having a melting point higher than said low-melting point, said first top surface of said first metal being contacted directly with said second metal, and said low-melting point metal being placed between said second top surface of said first metal and said second metal.