Patent ID: 9676047
Date: 2017-06-13
CPC Classifications: B23K,H01L

Claim:
1. A method of forming a metal bonding layer, the method comprising: forming first and second bonding metal layers on one surface of first and second bonding objects, respectively, such that at least one of the first bonding metal layer and the second bonding metal layer includes: disposing the second bonding object on the first bonding object such that the first bonding metal layer and the second bonding metal layer face each other; and forming a eutectic metal bonding layer through a second reaction between the first and second bonding metal layers, the second reaction including the first reaction between the first metal and the second metal, wherein at least one of the first bonding metal layer and the second bonding metal layer includes an oxidation prevention layer disposed on an upper surface thereof, the oxidation prevention layer being formed of a metal having an oxidation reactivity lower than an oxidation reactivity of the bonding metal layer on the upper surface of which the oxidation prevention layer is disposed.