Patent ID: 6337287
Filing Date: 2002-01-08
Classification: G11C

Abstract:
A method of manufacturing a nonvolatile memory system comprising the steps of:building an integrated circuit chip comprising a circuit to operate said nonvolatile memory system; patterning a plurality of first metal pads on the chip, each of said pads being connected to the circuit; depositing a first layer of ferroelectric film on top of the pattern of first metal pads; opening contact holes in the first ferroelectric film; depositing a second layer of metal on top of the first layer and forming contacts to the first metal pads through the contact holes; depositing a second layer of ferroelectric film on top of the second layer of metal; depositing a third layer of metal on top of the second layer of ferroelectric film and forming a contact to AC pads of the first metal pads; and etching away the second and first ferroelectric films extending beyond the boundary of the third metal film.