Eastman-kodak Company

Roberta Dileo Benedict

Kurt DeLance Sieber

J Lanny Tucker

Silas Owusu-Nkwantabisah

David Y Wang

A piezoelectric capacitor includes A) a composite article that has 1) a dry piezoelectric layer (dry PL); 2) a first dry electrode comprising a dry electrically-conductive layer arranged contiguously with a first opposing surface of the dry PL; and 3) a second dry electrode arranged contiguously with a second opposing surface of the dry PL. The dry electrically-conductive layer has essentially (a) an electrically-conductive material; and (b) particles having a Young's modulus that is different from the Young's modulus of the (a) electrically-conductive material by at least 10%. The capacitor also has B) electrical communication means attached to both electrodes for electrical communication of the composite article with an external electrical circuit.

Piezoelectric capacitor

An inertial piezoelectric device has: A) piezoelectric capacitor having a substrate; 2) a dry piezoelectric layer comprising a piezoelectric material; 3) a first electrode arranged contiguously with one opposing surface of the dry PL; and 4) a second electrode arranged contiguously with a second opposing surface of the first dry PL. The first dry electrically-conductive layer consists essentially of: (a) an electrically-conductive material; and (b) particles having a Young's modulus that is different from the Young's modulus of the (a) electrically-conductive material by at least 10%. The device also has B) signal processing electronics in electrical communication with the piezoelectric capacitor; C) a means for converting all or a portion of an applied force to an inertial force that is transmitted to the first dry PL; and optionally D) a proof mass that is contiguous with at least one external surface of the piezoelectric capacitor.

Inertial piezoelectric device

A composite article is designed for use in various devices and to exhibit improved piezoelectric effects. The composite article has 1) a dry piezoelectric layer (first dry PL) comprising a piezoelectric material, and 2) a dry electrically-conductive layer arranged contiguously with an opposing surface of the first dry PL. The dry electrically-conductive layer essentially has (a) an electrically-conductive material; and (b) particles having a Young's modulus that is different from the Young's modulus of the (a) electrically-conductive material by at least 10%, and which (b) particles have a d50 of at least 500 nm and up to and including 500 &#x3bc;m and a polydispersity coefficient that is less than or equal to 3. The weight ratio of the (b) particles to the (a) electrically-conductive material is at least 0.01:1 and up to and including 10:1.

Piezoelectric composite articles

A composite article has 1) a dry piezoelectric layer, and 2) a pair of non-electrically-connected co-planar patterned electrodes that are arranged contiguously with an opposing surface of the dry piezoelectric layer. Each electrode essentially has (a) an electrically-conductive material; and (b) particles having a Young's modulus that is different from the Young's modulus of the (a) electrically-conductive material by at least 10%.

Composite article with co-planar electrodes

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&#x2032;) 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&#x2032;) dielectric material is at least 0.01:1 and up to and including 10:1.

Composite articles with dielectric layer

A composite article has 1) a dry piezoelectric layer comprising a piezoelectric material, 2) a dry dielectric layer arranged contiguously with at least one of the opposing surfaces of the dry piezoelectric layer, and 3) a pair of non-electrically-connected co-planar patterned electrodes. 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&#x2032;) dielectric material by at least 10%.

Piezoelectric article with dielectric layer and co-planar electrodes

An electrically-conductive composition essentially has (a) an electrically-conductive material consisting essentially of silver nanoparticles that have a d50 of less than or equal to 60 &#x3bc;m and a d90 of less than or equal to 500 &#x3bc;m; (b) particles having a Young's modulus that is different from the Young's modulus of the (a) electrically-conductive material by at least 10%, which (b) particles have a d50 of 500 nm to 300 &#x3bc;m and a polydispersity coefficient of less than or equal to 3; (c) a binder material that is non-electrically-conductive; and (d) a solvent medium in an amount of less than or equal to 90 weight %, based on the total composition weight, which solvent medium is at least 50 weight % water. The weight ratio of the (b) particles to the (a) electrically-conductive material is at least 0.01:1 and up to and including 7:1.

Silver-containing electrically-conductive compositions

An electrically-conductive composition can be used with piezoelectric materials to enhance the piezoelectric effects. This composition essentially has (a) an electrically-conductive material; (b) particles having a Young's modulus that is different from the Young's modulus of the (a) electrically-conductive material by at least 10%, and which (b) particles have a d50 of at least 500 nm and up to and including 500 &#x3bc;m and a polydispersity coefficient that is less than or equal to 3; and (c) a non-electrically-conductive binder material. The weight ratio of the (b) particles to the (a) electrically-conductive material is at least 0.01:1 and up to and including 10:1. When the composition is coated and dried on an insulating substrate, a resulting dried composition exhibits a resistivity of less than 10,000 ohm-cm.

Electrically-conductive compositions

An article is prepared with surface regions having different contact angles. A reactive silane material is attached to a surface having a reactive tail component that is contacted with a first corresponding reactant, followed by imagewise UV exposure to cause imagewise reaction of the reactive tail component and first corresponding reactant, forming reacted regions and latent reaction regions. After rinsing, a second corresponding reactant that is capable of reaction with the reactive moiety is applied. Uniform UV exposure leads to a second reaction product only in the latent reaction regions. After rinsing, first regions comprise exclusively the first reaction product and second regions comprising exclusively the second reaction product. These first and second regions have contact angles that differ by 10-110 degrees. A composition can be applied that is exclusively attracted to either the first regions or the second regions, but not to both the first and second regions.

Growing community of inventors

Rochester, NY, United States of America

Roberta Dileo Benedict