Patent ID: 6362500
Filing Date: 2002-03-26
Classification: G11C,H01L

Abstract:
A ferroelectric nonvolatile memory comprising:a plurality of thin single crystal Si films formed in parallel in a stripe form on an insulating substrate, each stripe being separated in a stripe direction and said thin single crystal Si film having a junction structure of a first semiconductor region of a first conductivity type, a second semiconductor region of a second conductivity type and a third semiconductor region of the first conductivity type; a thin dielectric film formed to cover said thin single crystal Si films; a plurality of gate electrodes formed on the thin dielectric film to cover at least the second semiconductor regions which lie at the center of the junction structures along the stripes of said thin single crystal Si films; a thin ferroelectric film formed on said thin dielectric film and gate electrodes; a plurality of first stripe-form electrodes whose upper surfaces and side surfaces are covered with thin insulating films and which are arranged on said thin ferroelectric film to pass above said gate electrodes in a direction perpendicular to the stripes of said thin single crystal Si films; and a plurality of second stripe-form electrodes arranged on said thin ferroelectric film and first stripe-form electrodes to pass above said gate electrodes in a direction parallel to the stripes of said thin single crystal Si films; wherein an overlapping area of said first stripe-form electrode and said gate electrode is substantially equal to an area in which said second stripe-form electrode and said gate electrode overlap each other without interposing said first stripe-form electrode therebetween.