Optical: systems and elements – Optical modulator – Having particular chemical composition or structure
Reexamination Certificate
2007-06-12
2007-06-12
Spector, David N. (Department: 2873)
Optical: systems and elements
Optical modulator
Having particular chemical composition or structure
C359S332000
Reexamination Certificate
active
10535975
ABSTRACT:
A method for forming a domain-inverted structure includes the following: using a ferroelectric substrate (1) having a principal surface substantially perpendicular to the Z axis of crystals; providing a first electrode (3) on the principal surface of the ferroelectric substrate, the first electrode having a pattern of a plurality of electrode fingers (5) that are arranged periodically; providing a counter electrode (6) on the other side of the ferroelectric substrate so as to be opposite from the first electrode; and applying an electric field to the ferroelectric substrate with the first electrode and the counter electrode, thereby forming domain-inverted regions corresponding to the pattern of the first electrode in the ferroelectric substrate. Each of the electrode fingers of the first electrode is located so that a direction from a base to a tip (5a) of the electrode finger is aligned with the Y-axis direction of the crystals of the ferroelectric substrate. This method can provide a short-period uniform domain-inverted structure.
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Chinese Office Action from corresponding Chinese application No. 200380104116.X, mailed Dec. 8, 2006.
Mizuuchi Kiminori
Morikawa Akihiro
Sugita Tomoya
Hamre Schumann Mueller & Larson PC
Matsushita Electric - Industrial Co., Ltd.
Spector David N.
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