Photographic film that is needed to produce X-ray pictures: When Susan was being examined at the dentist's office, she had to hold a dental X-ray film with her teeth during a radiography.

Film is an abbreviation of an X-ray, a radiograph.

A method for making sheets of polycrystalline silicon for photovoltaic devices in which molten silicon is drawn upward by capillary action through a mold.

A layer of semiconductor material; such as, copper indium diselenide or gallium arsenide, a few microns or less in thickness, used to make photovoltaic cells.

A photovoltaic module constructed with sequential layers of thin film semiconductor materials.