Patent ID: 8120881

Claim:
A head gimbal assembly, comprising: a suspension, the suspension having a flexure, the flexure forming a PZT holding region thereon; a seed layer formed on the PZT holding region, the seed layer being metallic material, metal oxide, non-metallic material, or inorganic salt; and a piezoelectric element deposited on the seed layer, the piezoelectric element being electrically connected with the suspension to form a PZT micro-actuator; wherein: the piezoelectric element comprises a single-layer laminated structure, and the single-layer laminated structure has a first electrode layer formed on the seed layer, a piezoelectric layer formed on the first electrode layer and a second electrode layer formed on the piezoelectric layer, and the surface of the single-layer laminated structure is covered with a protective layer, and the protective layer is polymer; an electrical pad is respectively formed on the first electrode layer and the second electrode layer, and all the electrical pads are extend out of the protective layer; the PZT holding region comprises a left PZT holding region and a right PZT holding region, the left and the right PZT holding regions both form the seed layer, the first electrode layer, the piezoelectric layer and the second electrode layer, a left electrical connection pad is formed on the left PZT holding region, a right electrical connection pad is formed on the right PZT holding region; the electrical pad of the first electrode layer on the left PZT holding region is connected with the left electrical connection pad via a sputtering process, printing process, or plating process; the electrical pad of the first electrode layer on the right PZT holding region is connected with the right electrical connection pad via sputtering process, printing process, or plating process; and the electrical pads of the two second electrode layers on the left and the right PZT holding regions are connected to together.