Abstract: A bulk acoustic wave resonator and a formation method thereof are provided. The method for forming the bulk acoustic wave resonator includes forming a sacrificial structure on a substrate. A seed layer is formed on the sacrificial structure. A bottom electrode is formed on the seed layer. A piezoelectric layer is formed on the bottom electrode. A top electrode is formed on the piezoelectric layer. The sacrificial structure is removed to form a cavity. The seed layer is etched through the cavity.

Abstract: A composition of electric beam for spark plug and cable is provided which is consisted of carbon, Magnesium Oxide (MGO), and binder with suitable percentage in weight. The electric beam can be disposed between the center electrode and, the spark plug terminal. Since the electric beam comprises Magnesium Oxide (MGO) and carbon, the carbon is an excellent conductive material while the Magnesium Oxide (MGO) is an excellent insulator. Even the Magnesium Oxide (MGO), is an insulator, it has excellent potential capacity of store and excite the electrical charge. Consequently, when the current with high voltage flows over the electric beam, an intensified and concentrated current is generated. As a result, the spark is, stronger as compared to those spark plug without the electric beam. In light of this, when a stronger spark is generated, a complete combustion can be attained, i.e.--higher output of power can be attained.