Silicon-silicon anodic bonding process with embedded glass

This paper reports a silicon-silicon anodic bonding process based on embedded glass. We successfully embedded glass into patterned silicon groove by fusion treatment and bonded it with another silicon wafer by anodic bonding process. This process realizes the precise control of bonding pattern and the depth of the bonding gap without electrical connection between two silicon wafers. Tension test result shows that the bonding strength is over 7MPa-which is in accordance with normal anodic bonding process, so that the process can be used in a wide range of MEMS devices design.