Definition of:amorphous semiconductor amorphous semiconductor  A
solid state material that can be switched from one state to
another. For example, the recording layer in phase change
rewritable CDs and DVDs switches between an unstructured
amorphous state that absorbs light and a structured crystalline
state that allows light to pass. In phase change memory, the
storage cell switches between a state of low resistance to one
of very high resistance. Contrast with crystalline
semiconductor. See amorphous, amorphous silicon, chalcogenide
glass, phase change disc and phase change memory.