Composite articles with dielectric layer
AssigneeEastman Kodak Company
InventorsRoberta Dileo Benedict, Kurt D. Sieber
Life of this patent
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Abstract
A composite article useful in various electronic devices has 1) a dry piezoelectric layer (first dry PL) comprising a piezoelectric material, and 2) one or more dry dielectric layers arranged contiguously with opposing surfaces of the first dry PL. The dry dielectric layer has essentially: (a′) a dielectric material; and (b) particles having a Young's modulus that is different from the Young's modulus of the (a′) dielectric material by at least 10%. The (b) particles have a d50 of at least 500 nm and up to and including 500 m and a polydispersity coefficient that is less than or equal to 3, provided that the weight ratio of the (b) particles to the (a′) dielectric material is at least 0.01:1 and up to and including 10:1.
Claims20
A composite article comprising:
- 1) a first dry piezoelectric layer (first dry PL) comprising a piezoelectric material and having first and second opposing surfaces, and
- 2) one or more dry dielectric layers arranged contiguously with at least one of the first and second opposing surfaces of the first dry PL, wherein at least one dry dielectric layer (dry DL-P) consists essentially of:
- (a′) a dielectric material;
- and
- (b) particles distributed within the (a′) dielectric material, the (b) particles having a Young's modulus that is different from the Young's modulus of the (a′) dielectric material by at least 10%, and which (b) particles have a d50 of at least 500 nm and up to and including 500 μm and a polydispersity coefficient that is less than or equal to 3, provided that the weight ratio of the (b) particles to the (a′) dielectric material is at least 0.01:1 and up to and including 10:1;
- and
- optionally, the at least one dry DL-P further including a (c) binder material that is non-electrically-conductive and has a weight average molecular weight of at least 5,000.
Dependencies are inferred from the claim text.