An acoustic resonator device includes a bottom electrode disposed on a substrate over an air cavity, a piezoelectric layer disposed on the bottom electrode, and a top electrode disposed on the piezoelectric layer, where an overlap between the top electrode, the piezoelectric layer and the bottom electrode over the air cavity defines a main membrane region. The acoustic resonator device further includes at least one metal frame disposed on a bottom surface of the bottom electrode having a thickness that ranges from about 10% to about 75% of a thickness of the bottom electrode in a central region of the bottom electrode. The thickness of the metal frame improves heat dissipation out of the acoustic resonator device while also improving structural stability of the acoustic resonator device without detrimentally affecting its performance.