Patent ID: 7153758
Filing Date: 2006-12-26
Classification: C03C,H01L

Abstract:
1. An anodic bonding method comprising the steps of: forming a soft metal layer on a surface of a conductor layer or a semiconductor layer; forming an active metal layer on the soft metal layer, the active metal layer having a higher activity with oxygen than the soft metal layer; and heating the active metal layer and the glass layer that are brought into contact with each other while applying a DC voltage, using the conductor layer or the semiconductor layer as an anode and the glass layer as a cathode, between the anode and the cathode, thereby bonding the glass layer to the conductor layer or the semiconductor layer, wherein a metal layer comprising at least one of Al, Ti, Cr, V, and W is formed between the conductor layer or the semiconductor layer and the soft metal layer in order to improve adhesion therebetween, and a metal film comprising at least one of Cu, Ni, Pt, Pd, Ti, and Cr is formed between the soft metal layer and the active metal layer in order to prevent diffusion and reaction therebetween.