  The neglected quantum effect On CuO2 plane--the transition of electron
between neighbored ions is studied. To study this affection, an ideal square
lattice composed of triangle unit is proposed and studied. Every unit in the
square lattice has three ions and only one ion charge, the ion charge is
distributed on one A ion and two B ions with different possibility, and the A-B
bond length is far less than the distance between nearest units. The position
difference between A-B ions results in a lattice deformation with fixed
amplitude, and can be treated as an electricity dipole lattice. It is proved
that such lattice has a negative energy gap that can be much larger than that
of normal metal superconductor, and suggests a new superconductor mechanism.
