Polarization inversion method for ferroelectric substances
AssigneeFuji Photo Film Co., Ltd.
InventorYasukazu Nihei
Life of this patent
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Abstract
A pattern electrode having a predetermined pattern and a connecting electrode connected to the pattern electrode are formed on one surface of a single-polarized ferroelectric substance crystal. An electric field is applied across the ferroelectric substance crystal with corona charging or electron beam irradiation from the side of the other surface of the ferroelectric substance crystal. A polarization inversion region having a shape corresponding to the predetermined pattern is thus formed in the ferroelectric substance crystal. The electric field is applied in a state, in which an electrical insulating material is located on the other surface of the ferroelectric substance crystal and at a position corresponding to at least a position of a certain area of the connecting electrode.
Claims16
A polarization inversion method for a ferroelectric substance, comprising the steps of:
- i) forming a pattern electrode, which has a predetermined pattern, and a connecting electrode, which is electrically connected to the pattern electrode, on one surface of a single-polarized ferroelectric substance crystal,
- ii) locating a corona wire at a position which stands facing the other surface of the ferroelectric substance crystal, and
- iii) applying an electric field across the ferroelectric substance crystal with a corona charging technique by use of the corona wire and the pattern electrode, forming a polarization inversion region having a shape corresponding to the predetermined pattern of the pattern electrode in the ferroelectric substance crystal,
- wherein the application of the electric field is performed in a state, in which an electrical insulating material is located on the other surface of the ferroelectric substance crystal and at a position that corresponds to at least a position of a certain area of the connecting electrode.
A polarization inversion method for a ferroelectric substance, comprising the steps of:
- i) forming a pattern electrode, which has a predetermined pattern, and a connecting electrode, which is electrically connected to the pattern electrode, on one surface of a single-polarized ferroelectric substance crystal, and
- ii) applying an electric field across the ferroelectric substance crystal with irradiation of an electron beam to the ferroelectric substance crystal from the side of the other surface of the ferroelectric substance crystal, forming a polarization inversion region having a shape corresponding to the predetermined pattern of the pattern electrode in the ferroelectric substance crystal,
- wherein the application of the electric field is performed in a state, in which an electrical insulating material is located on the other surface of the ferroelectric substance crystal and at a position that corresponds to at least a position of a certain area of the connecting electrode.
Dependencies are inferred from the claim text.