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US 12,514,125 B2Granted
Injection-molded article of polymer piezoelectric material, piezoelectric element, apparatus for manufacturing injection-molded article of polymer piezoelectric material, and method for manufacturing injection-molded article of polymer piezoelectric material
AssigneeSeiko Epson Corporation
InventorsTakayuki Yonemura, Akihiko Tsunoya, Koichi Murayama
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Abstract
An injection-molded article of polymer piezoelectric material includes: a helical chiral polymer constituted by a polymer chain and having a unit cell with an a-axis, a b-axis, and a c-axis as crystal axes, wherein b-axis<a-axis<c-axis in terms of lengths of the crystal axes, the c-axis is parallel to a long chain direction of the polymer chain, the helical chiral polymer is a crystal in which the b-axis is uniaxially oriented, and the injection-molded article has piezoelectricity.
Claims12
An injection-molded article of polymer piezoelectric material, comprising:
- a helical chiral polymer constituted by a polymer chain and having a unit cell having dimensions that extend along each of an a-axis, a b-axis, and a c-axis as crystal axes;
- wherein the c-axis extends in a direction that is parallel to a long chain direction of the polymer chain,
- the a-axis extends in a first direction that is orthogonal to the c-axis,
- the b-axis extends in a second direction that is orthogonal to each of the a-axis and the c-axis,
- the helical chiral polymer is a crystal in which the b-axis is uniaxially oriented,
- (a length of the unit cell along the b-axis)<(a length of the unit cell along the a-axis)<(a length of the unit cell along the c-axis), and
- the injection-molded article has piezoelectricity.
4 more elements
Dependencies are inferred from the claim text.