Fig. 2: Proposed working mechanism of the TBJT and band structures of the TBJT at four positions.
From: Tribotronic bipolar junction transistor for mechanical frequency monitoring and use as touch switch
a When the FEP film comes in contact with the Cu pad, the TBJT and band diagram are in the cut-off mode. b The TBJT and band diagram are in the active mode when the FEP film moves the surface slightly away from the Cu pad. c When the FEP film is moved sequentially, the TBJT and band diagram are in the saturation mode. d The TBJT and band diagram return to the cut-off mode when the FEP electrification film slides backwards
