A computer-implemented method for securely managing multimedia data captured by a mobile computing device is disclosed. More specifically, a method of forming a thin polycrystalline silicon film and a thin film forming apparatus in which a state of plasma is controlled to achieve an emission intensity ratio of hydrogen atom radicals of one or more to the emission intensity of SiH* radicals in the plasma. The suppressor assembly may include a gas block mount positioned about the barrel. Respective three-dimensional fins have an epitaxial enhancement structure that introduces a strain into the three-dimensional fin.