Bert T Chien from 2089 Juliet Ave, Saint Paul, MN 55105, age 55, Phone: 6516982279

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Location:

Minneapolis, MN

Industry:

Renewables & Environment

Work:

3M
Product Development

Education:

University of Massachusetts, Amherst
University of Michigan

Skills:

Product Development
Six Sigma
R&D
Cross Functional Team Leadership

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Polyimides For High-Frequency Applications
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US Patent:

6392004, May 21, 2002
Filed:

Aug 21, 2000
Appl. No.:

09/642849
Inventors:

Bert T. Chien - Minneapolis MN
Stephen A. Ezzell - Woodbury MN
Assignee:

3M Innovative Properties Company - Saint Paul MN
International Classification:

C08G 7310
US Classification:

528170, 528128, 528172, 528173, 528176, 528183, 528185, 528220, 528229, 528353, 528125, 343700 R, 343785, 343911 R, 385129, 385130, 385141, 385145, 428 11, 428 126, 4284735, 428901
Abstract:

An element of a gigahertz electronic device is provided comprising a polyimide selected to have an imide equivalent weight of 375 or greater. The polyimide preferably has a dielectric loss at 12. 8 GHz of 0. 009 or less and a Tg of 260Â C. or greater. Such elements include circuit substrates and antennas.

Cured Fluorenyl Polyimides
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US Patent:

6417321, Jul 9, 2002
Filed:

Aug 21, 2000
Appl. No.:

09/642724
Inventors:

Kazuhiko Minami - Sagamihara, JP
Hiroshi Ayukawa - Sagamihara, JP
Toshihiro Suwa - Sagamihara, JP
Mitsuaki Kobayashi - Hino, JP
Bert T. Chien - Minneapolis MN
Stephen A. Ezzell - Woodbury MN
Assignee:

3M Innovative Properties Company - Saint Paul MN
International Classification:

C08G 7310
US Classification:

528353, 528125, 528128, 528170, 528172, 528173, 528176, 528183, 528185, 528220, 528229, 428 11, 428 126, 4284735, 428901, 385129, 385130, 385141, 385145, 343700 R, 343785, 343911 R
Abstract:

A thermally cured polyimide is provided, and in particular a crosslinked polyimide, comprising a fluorenyl diamine and comprising an aromatic ring having at least one C1-C10 branched or unbranched alkyl substituent, where the alkyl substituent includes a benzylic hydrogen. The present invention provides a crosslinked polyimide made by a process comprising the step of crosslinking a polyimide comprising diamines comprising pendent fluorenyl groups and comprising aromatic rings having at least one C1-C10 branched or unbranched alkyl substituent, the alkyl substituent including a benzylic hydrogen, by raising the temperature of said polyimide above its glass transition temperature.

Zirconia Sol, Process Of Making Composite Material
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US Patent:

20020004544, Jan 10, 2002
Filed:

Oct 28, 1999
Appl. No.:

09/428374
Inventors:

BRANT U. KOLB - AFTON MN, US
BERT T. CHIEN - MINNEAPOLIS MN, US
International Classification:

C08L001/00
US Classification:

524/413000
Abstract:

A zirconia sol comprising an aqueous phase having dispersed therein a plurality of single crystal zirconia particles having an average primary particle size less than about 20 nm. The zirconia sols are substantially non associated having a dispersion index ranging from about 1-3 and are highly crystalline exhibiting a crystallinity index of about 0.65 or greater. Of the crystalline phase, about 70% or greater exists in combined cubic and tetragonal crystal lattice structures without a crystal phase stabilizer. Also described is a hydrothermal method of making zirconia sols having substantially non-associated zirconia particles and composite materials made from the zirconia sols.

Plastic Substrate For Display Applications
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US Patent:

20020192445, Dec 19, 2002
Filed:

May 3, 2001
Appl. No.:

09/848029
Inventors:

Stephen Ezzell - Woodbury MN, US
Robert Moshrefzadeh - Oakdale MN, US
Elisa Cross - Woodbury MN, US
Bert Chien - Minneapolis MN, US
Mitsuaki Kobayashi - Tokyo, JP
Hiroshi Ayukawa - Kanagawa, JP
International Classification:

B32B007/02
B32B001/00
US Classification:

428/212000, 428/332000
Abstract:

Components for electronic displays containing a polyimide substrate and an electrical conductor are disclosed. The components are suitable for use in touch panel displays. The invention is also directed to electronic displays incorporating the components of the invention, and methods of making the display components. The combined polyimide substrate and electrical conductor are selected such that they have high internal radiation transmissivity, and typically have an effective radiation absorption coefficient of less than 0.02 per micron at wavelengths from 400 to 450 nm. In addition, the polyimide substrate permits processing of the display components at elevated temperatures, and usually has a glass transition temperature greater than 300 C.

Brightness Enhancing Film Composition
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US Patent:

20050124713, Jun 9, 2005
Filed:

Dec 4, 2003
Appl. No.:

10/727830
Inventors:

Clinton Jones - Somerset WI, US
David Olson - Marine on St. Croix MN, US
Judith Invie - Woodbury MN, US
Olester Benson - Woodbury MN, US
Richard Pokorny - Maplewood MN, US
Scott Kaytor - Woodbury MN, US
Tetsuya Toma - Woodbury MN, US
Scott Tapio - Falcon Heights MN, US
Bert Chien - Minneapolis MN, US
Daniel Hennen - Cottage Grove MN, US
Jung-Sheng Wu - Woodbury MN, US
International Classification:

C08G002/00
US Classification:

522006000
Abstract:

Polymerizable compositions particularly useful for brightness enhancing films.