In this study, a new technology to bond the PZT with connection board, which is a core technology for the fabrication of medical micro high frequency sensors, was developed. Two technologies were adopted. One is bonding of In using thermal heating, the other is bonding of Pb using a high frequency heating machine. In case of thermal heating, bonding was failed because of the contaminations of In surface. But, when using a high frequency heating machine, we developed good bonding characteristics at various experimental conditions and thickness of the electrode material.