Thomas Michael Dougherty

US Patent:

6984745, Jan 10, 2006

Filed:

Feb 2, 2004

Appl. No.:

10/771066

Inventors:

Thomas K. Dougherty - Playa Del Rey CA, US
John J. Drab - Santa Barbara CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

C07F 3/00
C07F 7/00
C04B 35/49
B05D 5/12
C09K 3/00

US Classification:

556 55, 556105, 501134, 4271263, 423608, 423618, 25218311

Abstract:

The synthesis, processing and test of improved lead zirconate titanate (PZT) precursor materials useful for making bulk, thick films and thin films of PZT are provided. PZT is an oxide ceramic extensively used for its piezoelectric properties. A variety of devices made from piezoelectric PZT are known. A soluble spin-on precursor is provided that is compatible with and soluble in non-toxic and environmentally benign solvents (including water), has high stability and long shelf life, and provides high quality PZT films.

US Patent:

7683854, Mar 23, 2010

Filed:

Feb 9, 2006

Appl. No.:

11/350429

Inventors:

Daniel F. Sievenpiper - Los Angeles CA, US
Thomas K. Dougherty - Playa Del Rey CA, US
John J. Drab - Santa Barbara CA, US
Solomon O. Robinson - Oxnard CA, US

Assignee:

Raytheon Company - Waltham MA

International Classification:

H01Q 15/02

US Classification:

343909, 343700 MS, 4551931

Abstract:

A tunable impedance surface includes a varactor. The varactor comprises a bottom electrode formed on a surface of a substrate. First and second ferroelectric elements are on top of the bottom electrode and electrically connected to one another through the bottom electrode. A first top electrode is on top of and electrically connected to the first ferroelectric element and a second top electrode is on top of and electrically connected to the second ferroelectric element.

US Patent:

8007989, Aug 30, 2011

Filed:

Apr 11, 2008

Appl. No.:

12/081143

Inventors:

Thomas Kirk Dougherty - Playa Del Rey CA, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G03F 7/00
G03F 1/00

US Classification:

430322, 430325, 430330

Abstract:

A method for forming a patterned ferroelectric layer, having ferroelectric electronic properties, on a substrate. A composite layer, made of ferroelectric layer producing metal acrylate compounds, a photoinitiator compound and an acrylate crosslinking compound is formed on the substrate. A photomask is formed on the composite layer. Unmasked areas of the composite layer are irradiated with ultraviolet light. A solvent removes non-irradiated areas of the composite layer from the substrate. The patterned composite layer is heated in an oxygen atmosphere to cause a chemical reaction among the ferroelectric layer producing metal acrylate compounds and oxygen, a patterned ferroelectric layer being formed on the substrate.

US Patent:

8338556, Dec 25, 2012

Filed:

Apr 14, 2011

Appl. No.:

13/064773

Inventors:

Thomas Kirk Dougherty - Playa Del Rey CA, US

Assignee:

The United States of America as Represented by the Secretary of the Navy - Washington DC

International Classification:

G03C 1/00
G03F 7/00
C07C 49/84

US Classification:

526327, 522 44

Abstract:

A patterned composite ferroelectric layer, having ferroelectric electronic properties, on a substrate. Individual layers are each made of metal acrylate compounds, a photoinitiator compound and an acrylate crosslinking compound. The individual layers are stacked on the substrate to form a composite layer. A photomask is formed on the composite layer. Unmasked areas of the composite layer are irradiated with ultraviolet light. A solvent removes non-irradiated areas of the composite layer from the substrate. The patterned composite layer is heated in an oxygen atmosphere to cause a chemical reaction among the metal acrylate compounds and oxygen, a patterned composite ferroelectric layer being formed on the substrate.

US Patent:

20100255312, Oct 7, 2010

Filed:

Nov 17, 2009

Appl. No.:

12/620001

Inventors:

Thomas K. Dougherty - Playa Del Rey CA, US
Christopher T. Snively - McKinney TX, US
Steven E. Lau - Harbor City CA, US
William J. Wolfgong - Little Elm TX, US
Cindy W. Ma - Union City CA, US
Stephen L. Schrader - Murphy TX, US

International Classification:

B32B 27/38
C09D 163/00

US Classification:

428413, 523400, 523457, 523460, 523459, 523456, 523458

Abstract:

The disclosure relates to an X-ray opaque coating containing an epoxy resin including an iodinated phenol covalently bonded to a glycidyl ether. Iodinated phenol covalently bonded to a glycidyl ether may include iodinated bisphenol A, such as tetraiodobisphenol A, a glycidyl ether of mono-iodophenol, bis-iodophenol, tri-iodophenol, or combinations thereof. The coating may include an X-ray opaque inorganic filler. The disclosure also relates to an electronic component including a substrate and at least one device coupled to the substrate with an obfuscation layer disposed over the substrate for obscuring the device from an X-ray source. The obfuscation layer may include an X-ray opaque coating. The disclosure additionally relates to a method of obscuring at least a portion of an electronic component by depositing an obfuscation layer that may include an X-ray opaque coating and a method of forming an X-ray opaque coating.

US Patent:

49772201, Dec 11, 1990

Filed:

Feb 20, 1990

Appl. No.:

7/485925

Inventors:

Thomas K. Dougherty - Playa del Rey CA
Susan L. Oldham - Torrance CA
William E. Elias - Redondo Beach CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

C08G 5902
C08G 5922
C08C 1906
C08C 1940

US Classification:

5253323

Abstract:

Epoxy end-capped oligomers of 1,3-diolefin compounds of Formula I ##STR1## These oligomers are formed by: (a) reacting a 1,3-diolefin compound having 4 to 12 carbon atoms per molecule with a difunctional initiator comprising anionic reactive sites to form an intermediate living oligomer comprising two anionic end groups; and (b) reacting the intermediate living oligomer with a halohydrin compound to epoxidize the two anionic end groups and form the desired oligomer. The oligomers are subsequently reacted with an epoxidizing agent to form a polymer having epoxy-derived linkages at regular intervals along the chain of the polymer.

US Patent:

52868907, Feb 15, 1994

Filed:

Apr 16, 1992

Appl. No.:

7/870432

Inventors:

Thomas K. Dougherty - Playa Del Rey CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

C07F 704
C07F 710

US Classification:

556425

Abstract:

Novel aniline terminated silicone monomers with (a) silane (Si--H) functionalities, (b) silanol (Si--OH) functionalities, or (c) alpha,omega-aniline terminated polydimethyl siloxanes, and a novel synthetic route. The alpha,omega-aniline terminated dimethyl siloxanes are prepared, starting with bromoaniline, in which the amine functionality is protected, such as by reaction with 1,1,4,4-tetramethyl-1,4-bis(N,N-diethylamino)-1,4-disilabutane, to form 1-(bromophenyl)-2,2,5,5-tetramethyl-l-aza-2,5-disilacyclopentane. The protected bromoaniline is then reacted with n-butyllithium and chlorodialkylsilane to form 1-((dialkylsilyl)phenyl)-2,2,5,5-tetramethyl-l-aza-2,5-disilacyclopentane. Next, the protected dimethylsilane aniline is subjected to de-protection to form aminophenyldialkyl silane, which is considered to be novel. This silane is then hydrolyzed to form the corresponding silanol, also considered to be novel. The silanol is then condensed to form bis(amino-phenyl)-1,1,3,3-tetraalkyldisiloxane.

US Patent:

50754750, Dec 24, 1991

Filed:

Nov 19, 1990

Appl. No.:

7/615112

Inventors:

Thomas K. Dougherty - Playa Del Rey CA
Thomas W. Giants - Santa Monica CA

Assignee:

Hughes Aircraft Company - Los Angeles CA

International Classification:

C07F 710

US Classification:

556412

Abstract:

Silanol-terminated aromatic imide compounds of Formula I ##STR1## where R. sub. 3 and R. sub. 4 are each selected from the group consisting of a C. sub. 1 to C. sub. 6 alkyl group, an unsubstituted aryl group and a substituted aryl group, Z is a divalent radical. are prepared by: (a) reacting a bromoaniline compound with a chosen silylating agent to form a compound having the formula BrC. sub. 6 H. sub. 5 NSi(R. sub. 1). sub. 3 Si(R. sub. 2). sub. 3, where R. sub. 1 and R. sub. 2 are each a C. sub. 1 to C. sub. 4 alkyl group (b) reacting the compound formed in step "a" with n-butyllithium, followed by reaction with a chosen halogenated alkylsilane compound to form a compound having Formula II ##STR2## where R. sub. 1, R. sub. 2, R. sub. 3, and R. sub. 4 are as defined above (c) reacting the compound of Formula II formed in step "b" with a dianhydride compound having the formula ##STR3## where Z is as defined above to form a compound having Formula III ##STR4## where R. sub. 3, R. sub. 4, and Z are as defined above (d) hydrolyzing the compound of Formula III formed in step "c" to form the compound of Formula I.