Patent ID: 8012869
Filing Date: 2011-09-06
Classification: H01L

Abstract:
1. A method for bonding an aluminum bonding member and a silicon electrode, said method comprising the steps of: providing the aluminum bonding member and the silicon electrode; and bonding the aluminum bonding member and the silicon electrode by pressing the aluminum bonding member against the silicon electrode and applying ultrasound to the aluminum bonding member, wherein in the bonding step, at an interface at which the aluminum bonding member and the silicon electrode are bonded to each other, a layer of aluminum oxide and a layer of silicon oxide are formed between the aluminum bonding member and the silicon electrode, the aluminum bonding member, the layer of aluminum oxide, the layer of silicon oxide, and the silicon electrode are sequentially stacked, the aluminum bonding member comes into direct contact with the layer of aluminum oxide, while the silicon electrode comes into direct contact with the layer of silicon oxide, and the layer of aluminum oxide comes into direct contact with the layer of silicon oxide.