Patent ID: 7321183

Claim:
A film bulk acoustic resonator, comprising: a first insulator pattern; a second insulator pattern disposed apart from the first insulator pattern; a third insulator pattern disposed in an opposite direction to the second insulator pattern in relation to the first insulating pattern and apart from the first insulating pattern; a fourth insulator pattern disposed in an opposite direction to the first insulator pattern in relation to the second insulating pattern and apart from the second insulator pattern; a bottom conductive layer disposed above the first and third insulator patterns, spreading from a region between the first and second insulator patterns to the third insulator pattern; a piezoelectric film on the bottom conductive layer, disposed above the region between the first and second insulating patterns; and a top conductive layer facing the bottom conductive layer to sandwich the piezoelectric film, the top conductive layer spreading from the region between the first and second insulator patterns to the fourth insulator pattern.