Clive Alan Randall

US Patent:

6482527, Nov 19, 2002

Filed:

Oct 27, 2000

Appl. No.:

09/699028

Inventors:

Thomas R. Shrout - Port Matilda PA
Clive A. Randall - State College PA
Wei Ren - Kingston, CA
Ryan Thayer - State College PA
Nathanael Bennink - Garland TX

Assignee:

The Penn State Research Foundation - University Park PA

International Classification:

C04B 3548

US Classification:

428469, 428697, 428699, 428701, 428702, 428213, 501134, 423593, 42725533, 427255395, 2041921

Abstract:

A thin film comprising a pyrochlore represented by the formula: wherein x is from about 0. 45 to about 0. 73 and an article comprising a substrate and, coated on the substrate, a thin film of the pyrochlore are provided. Also provided is a process for depositing on a substrate the above pyrochlore thin film. The process includes the steps of coating the substrate with a composition comprising bismuth carboxylate, zinc carboxylate, niobium alkoxide, an organic solvent, an organic acid and an organic base, heating to remove organic components and annealing at a temperature and for a length of time sufficient to produce the pyrochlore thin film on the substrate.

US Patent:

6680269, Jan 20, 2004

Filed:

Jun 27, 2001

Appl. No.:

09/892364

Inventors:

Tomohiro Sogabe - Chiba, JP
Thomas R. Shrout - Port Matilda PA
Michael T. Lanagan - State College PA
Clive A. Randall - State College PA

Assignee:

The Penn State Research Foundation - University Park PA

International Classification:

C04B 35495

US Classification:

501134

Abstract:

The disclosed invention relates to Bi O âZnOâTa O dielectric compounds and compositions, and to their manufacture. The compounds of the invention have outstanding K, Q, TCF, and TCC. Examples of these properties include a K of between 58 and 80, a low dielectric loss (tan 0. 003), and a TCC30 ppm/Â C. Ceramic compositions produced include those represented by Bi (ZnTa ) O where 0. 57x1. 0, Bi (ZnTa ) O where 1. 0y3. 0, as well as by Bi (ZnTa ) O where 1. 0y3. 0 with the proviso that y is not=2. Solid solutions of compounds defined by the formula r(Bi (Zn Ta ) O )-(1-r)(Bi Zn )(Zn Ta )O )) where 0r1 also are produced.

US Patent:

6685849, Feb 3, 2004

Filed:

May 14, 2001

Appl. No.:

09/854927

Inventors:

Richard E. Eitel - State College PA
Clive A. Randall - State College PA
Thomas R. Shrout - State College PA

Assignee:

The Penn State Research Foundation - University Park PA

International Classification:

C09K 35472

US Classification:

252 629R, 501152, 501134, 501135, 501136

Abstract:

The present invention is directed to a new family of high Curie temperature, morphotropic phase boundary systems, based on the perovskite solid solution having the general formula (1-x)BiMeO -xPbTiO , where Me is a suitably sized cation or combination of cations and x is a molar fraction. The perovskite systems of the present invention offer room temperature properties analogous to, and high temperature properties superior to, commercially available PZT compositions. The perovskite of this invention exhibits a MPB between the rhombohedral and tetragonal phases. Further dopant strategies may be used for property optimization of the perovskite systems.

US Patent:

6700772, Mar 2, 2004

Filed:

Jul 11, 2001

Appl. No.:

09/903030

Inventors:

Ramesh Raghavendra - Dundalk, IE
Clive A. Randall - State College PA
Amanda L. Baker - Boalsburg PA
Neil McLoughlin - Blackrock, IE

Assignee:

Littlefuse Ireland Development Company Limited - Dundalk

International Classification:

H01G 406

US Classification:

3613212, 361311, 361313, 3613063, 3613214

Abstract:

An IPD has a varistor of electrodes and a ZnO dielectric. A capacitor includes electrodes and a dielectric that has oxides of bismuth, magnesium, and niobium having a pyrochlore structure of type A B O. The materials are applied as wet layers and are sintered for integrated production.

US Patent:

6942901, Sep 13, 2005

Filed:

Jan 6, 2000

Appl. No.:

09/478702

Inventors:

Jonathan Van Tassel - State College PA, US
Clive A. Randall - State College PA, US

Assignee:

The Penn State Research Foundation - University Park PA

International Classification:

H05C001/00
B29C047/96

US Classification:

427458, 427469, 427475, 427482, 427485, 4251748 R, 4251748 E

Abstract:

A single or multi-component particulate tape and a method and apparatus for making the single or multi-component particulate tape. More particularly, the present invention relates to a single or multi-component particulate tape and method for making a single or multi-component particulate tape using the process of electrophoretic deposition. These tapes and tapes produced using these methods can be used to make single or multi-layer electronic devices such as capacitors, varistors, inductors, and the like, as well as structural laminate components. The method comprises casting a tape by electrophoretic deposition and also or alternatively depositing additional functional materials on or into the cast tape by electrophoresis.

US Patent:

6964718, Nov 15, 2005

Filed:

Nov 16, 2001

Appl. No.:

09/993284

Inventors:

Clive A. Randall - State College PA, US
Amanda L. Baker - Boalsburg PA, US
Yi Fang - State College PA, US
Thomas Shrout - Port Matilda PA, US
Alfons Kelnberger - Stuttgart, DE

Assignee:

The Penn State Research Foundation - University Park PA

International Classification:

C04B037/00
C04B033/32

US Classification:

156 8916, 156 8918, 264619, 264620, 29 2535

Abstract:

Co-fired multilayer piezoelectric ceramic materials with base metal electrodes based on copper, copper alloy, are found as an effective approach to manufacture low cost multilayer piezoelectrics. The method of the invention is performed at low firing temperature and without the oxidation of base metal or reduction of ceramic components. A variety of ceramic materials may be used and copper is the preferred base metal in the multi-layer piezoelectric devices of the invention. This copper has additional protection against oxidation with a small inorganic coating on the surface. With such protection, the binder and other organics can also be efficiently removed and produce superior performance in the piezoelectric structured devices.

US Patent:

7501743, Mar 10, 2009

Filed:

Apr 27, 2007

Appl. No.:

11/741227

Inventors:

Kenji Uchino - State College PA, US
Clive A. Randall - State College PA, US
Jose Agraz - La Jolla CA, US
Richard Eitel - State College PA, US
Seung-Ho Park - State College PA, US

Assignee:

The Penn State Research Foundation - University Park PA

International Classification:

H01L 41/083

US Classification:

310328, 310367, 310358

Abstract:

A piezoelectric ultrasonic motor having 2-dimensional positioning movement includes a stator. The stator includes a piezoelectric ceramic bar and an electrode disposed on the bar. Each bar includes two wings that are separated by a predetermined angle to form a predetermined shape. A power source is used to apply a voltage to the stator to excite a bending mode vibration in the each of the wings, and the combined motion of the two wings produces an elliptical motion at a tip of the wing. A load is operatively connected to the stator, such that a portion of the load in contact with the stator is driven to move linearly through a frictional force between the load and the stator, due to the elliptical motion at the tip of the wing.

US Patent:

8293323, Oct 23, 2012

Filed:

Feb 23, 2007

Appl. No.:

11/710604

Inventors:

Susan Trolier McKinstry - State College PA, US
Clive A. Randall - State College PA, US
Song Won Ko - State College PA, US
Michael S. Randall - Simpsonville SC, US

Assignee:

The Penn State Research Foundation - University Park PA

International Classification:

B05D 5/12

US Classification:

427229, 4271261

Abstract:

Metal solutions such as copper and nickel suitable for chemical solution deposition (CSD) are disclosed, and their manufacture into low resistivity thin metal films is disclosed. The films may be thermal processed at relatively low temperatures and may be co-fired with ultra low fire high K ceramic dielectrics.