Patent ID: 8916396
Filing Date: 2014-12-23
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor element, comprising: forming an element structure layer including a semiconductor layer, on a first substrate; forming a first bonding layer on the element structure layer to provide a first laminated body; forming a second bonding layer on a second substrate to provide a second laminated body; and performing heating pressure-bonding on the first and second laminated bodies, with the first and second bonding layers facing each other, to provide a combined semiconductor element having a bonding portion that is made by said heating pressure-bonding of the first and second laminated bodies, wherein one of the first bonding layer and the second bonding layer is a layer of Au, the other is a layer comprising AuSn, and the layer comprising AuSn comprises a surface layer and an underlayer, said surface layer having a Sn content in a range of between 85 wt % and 95 wt %, and sais underlayer comprising AuSn and having a Sn content lower than the Sn content of said surface layer; and wherein said heating pressure-bonding is performed at a temperature equal to or below a melting point of Au and the underlayer.