Patents by Inventor Guoping Mao
Guoping Mao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20040258885Abstract: An etched dielectric film for use in microfluidic devices. Channels, recesses, and other features can be etched into the films to make them suitable for use in microfluidic devices.Type: ApplicationFiled: March 3, 2004Publication date: December 23, 2004Inventors: Nathan P. Kreutter, Rui Yang, Guoping Mao, Denny G. Aeschliman, Douglas B. Gundel, David C. Lueneburg
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Publication number: 20040256731Abstract: A dielectric composite material containing a toughened benzocyclobutene resin and at least about 50% by weight of an inorganic filler. Also electronic packages having at least one conductive layer and at least one layer of the dielectric composite material. The dielectric composite material can have a dielectric constant less than about 3.5, and a dielectric loss of less than about 0.004.Type: ApplicationFiled: June 19, 2003Publication date: December 23, 2004Inventors: Guoping Mao, Shichun Qu, Fuming B. Li, Robert S. Clough, Nelson B. O'Bryan
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Publication number: 20040247921Abstract: An etched dielectric film for use in a hard disk drive. The dielectric film has a thickness of about 25 &mgr;m or greater when it is attached to a supporting metal substrate, and is subsequently etched to a thickness of about 20 &mgr;m or less.Type: ApplicationFiled: February 23, 2004Publication date: December 9, 2004Inventors: Robert S. Dodsworth, Guoping Mao, Vicki L. Richmond, Rui Yang
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Publication number: 20040126694Abstract: Method of fabricating an optical element. A photodefinable composition is provided that includes (i) a hydrophobic, photodefinable polymer, said photodefinable polymer having a glass transition temperature in the cured state of at least about 80° C.; and (ii) a multiphoton photoinitiator system comprising at least one multiphoton photosensitizer and preferably at least one phtoinitiator that is capable of being photosensitized by the phtosensitizer. One or more portions of the composition are imagewise exposed to the electromagnetic energy under conditions effective to photodefinably form at least a portion of a three-dimensional optical element.Type: ApplicationFiled: December 12, 2002Publication date: July 1, 2004Inventors: Robert J. Devoe, Catherine A. Leatherdale, Guoping Mao, Patrick R. Fleming, Harvey W. Kalweit
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Patent number: 6686308Abstract: A supported catalyst is provided comprising catalyst metal nanoparticles having an average particle size of 3.0 nm or less, or more typically 2.0 nm or less, and typically having a standard deviation of particle size of 0.5 nm or less, which are supported on support particles at a loading of 30% or more. Typical catalyst metals are selected from platinum, palladium, ruthenium, rhodium, iridium, osmium, molybdenum, tungsten, iron, nickel and tin. Typical support particles are carbon. A method of making a supported catalyst is provided comprising the steps of: a) providing a solution of metal chlorides of one or more catalyst metals in solvent system containing at least one polyalcohol, typically ethylene glycol containing less than 2% water; b) forming a colloidal suspension of unprotected catalyst metal nanoparticles by raising the pH of the solution, typically to a pH of 10 or higher, and heating said solution, typically to 125 ° C.Type: GrantFiled: December 3, 2001Date of Patent: February 3, 2004Assignee: 3M Innovative Properties CompanyInventors: Shane Shanhong Mao, Guoping Mao
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Publication number: 20030211425Abstract: A photoimageable, aqueous acid soluble polyimide polymer comprising an anhydride, including a substituted benzophenone nucleus, a diamine reacted with the anhydride to form a photosensitive polymer intermediate, and at least 60 Mole % of solubilizing amine reacted with the photosensitive polymer intermediate to form the photoimageable, aqueous acid soluble polyimide polymer. An emulsion for electrophoretic deposition of a coating of a photoimageable, aqueous acid soluble polyimide polymer comprises a dispersed phase, including the photoimageable aqueous acid soluble polyimide polymer, dissolved in an organic solvent and a dispersion phase including a coalescence promoter and water. The emulsion may be applied, by electrophoretic deposition, to a conductive structure to provide a photoimageable coating on the conductive structure.Type: ApplicationFiled: March 18, 2003Publication date: November 13, 2003Applicant: 3M Innovative Properties CompanyInventors: Guoping Mao, Hany B. Eitouni, Alphonsus V. Pocius, John B. Scheibner, Nanayakkara L.D. Somasiri, Nicholas A. Stacey, Alfred Viehbeck
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Publication number: 20030180664Abstract: A photoimageable, aqueous acid soluble polyimide polymer comprising an anhydride, including a substituted benzophenone nucleus, a diamine reacted with the anhydride to form a photosensitive polymer intermediate, and at least 60 Mole % of solubilizing amine reacted with the photosensitive polymer intermediate to form the photoimageable, aqueous acid soluble polyimide polymer. An emulsion for electrophoretic deposition of a coating of a photoimageable, aqueous acid soluble polyimide polymer comprises a dispersed phase, including the photoimageable aqueous acid soluble polyimide polymer, dissolved in an organic solvent and a dispersion phase including a coalescence promoter and water. The emulsion may be applied, by electrophoretic deposition, to a conductive structure to provide a photoimageable coating on the conductive structure.Type: ApplicationFiled: March 18, 2003Publication date: September 25, 2003Applicant: 3M Innovative Properties CompanyInventors: Guoping Mao, Hany B. Eitouni, Alphonsus V. Pocius
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Publication number: 20030104936Abstract: A supported catalyst is provided comprising catalyst metal nanoparticles having an average particle size of 3.0 nm or less, or more typically 2.0 nm or less, and typically having a standard deviation of particle size of 0.5 nm or less, which are supported on support particles at a loading of 30% or more. Typical catalyst metals are selected from platinum, palladium, ruthenium, rhodium, iridium, osmium, molybdenum, tungsten, iron, nickel and tin. Typical support particles are carbon. A method of making a supported catalyst is provided comprising the steps of: a) providing a solution of metal chlorides of one or more catalyst metals in solvent system containing at least one polyalcohol, typically ethylene glycol containing less than 2% water; b) forming a colloidal suspension of unprotected catalyst metal nanoparticles by raising the pH of the solution, typically to a pH of 10 or higher, and heating said solution, typically to 125 ° C.Type: ApplicationFiled: December 3, 2001Publication date: June 5, 2003Applicant: 3M Innovative Properties CompanyInventors: Shane Shanhong Mao, Guoping Mao
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Patent number: 6559245Abstract: A photoimageable, aqueous acid soluble polyimide polymer comprising an anhydride, including a substituted benzophenone nucleus, a diamine reacted with the anhydride to form a photosensitive polymer intermediate, and at least 60 Mole % of solubilizing amine reacted with the photosensitive polymer intermediate to form the photoimageable, aqueous acid soluble polyimide polymer. An emulsion for electrophoretic deposition of a coating of a photoimageable, aqueous acid soluble polyimide polymer comprises a dispersed phase, including the photoimageable aqueous acid soluble polyimide polymer, dissolved in an organic solvent and a dispersion phase including a coalescence promoter and water. The emulsion may be applied, by electrophoretic deposition, to a conductive structure to provide a photoimageable coating on the conductive structure.Type: GrantFiled: January 3, 2002Date of Patent: May 6, 2003Assignee: 3M Innovative Properties CompanyInventors: Guoping Mao, Nanayakkara L. D. Somasiri, Nicholas A. Stacey
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Patent number: 6403211Abstract: A flexible circuit comprising a liquid crystal polymer film having through-holes and related shaped voids formed therein using an etchant composition comprising a solution in water of from about 35 wt. % to about 55 wt. % of an alkali metal salt; and from about 10 wt. % to about 35 wt. % of a solubilizer dissolved in the solution to provide the etchant composition suitable for etching the liquid crystal polymer at a temperature from about 50° C. to about 120° C.Type: GrantFiled: July 18, 2000Date of Patent: June 11, 2002Assignee: 3M Innovative Properties CompanyInventors: Rui Yang, Guoping Mao
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Patent number: 6379865Abstract: A photoimageable, aqueous acid soluble polyimide polymer comprising an anhydride, including a substituted benzophenone nucleus, a diamine reacted with the anhydride to form a photosensitive polymer intermediate, and at least 60 Mole % of solubilizing amine reacted with the photosensitive polymer intermediate to form the photoimageable, aqueous acid soluble polyimide polymer. An emulsion for electrophoretic deposition of a coating of a photoimageable, aqueous acid soluble polyimide polymer comprises a dispersed phase, including the photoimageable aqueous acid soluble polyimide polymer, dissolved in an organic solvent and a dispersion phase including a coalescence promoter and water. The emulsion may be applied, by electrophoretic deposition, to a conductive structure to provide a photoimageable coating on the conductive structure.Type: GrantFiled: April 11, 2000Date of Patent: April 30, 2002Assignee: 3M Innovative Properties CompanyInventors: Guoping Mao, Hany B. Eitouni, Alphonsus V. Pocius, John B. Scheibner, Nanayakkara L. D. Somasiri, Nicholas A. Stacey, Alfred Viehbeck
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Publication number: 20020028293Abstract: A process for providing a metal-seeded liquid crystal polymer comprising the steps of providing a liquid crystal polymer substrate to be treated by applying an aqueous solution comprising an alkali metal hydroxide and a solubilizer as an etchant composition for the liquid crystal polymer substrate. Further treatment of the etched liquid crystal polymer substrate involves depositing an adherent metal layer on the etched liquid crystal polymer substrate. An adherent metal layer may be deposited using either electroless metal plating or vacuum deposition of metal such as by sputtering.Type: ApplicationFiled: September 4, 2001Publication date: March 7, 2002Applicant: 3M Innovative Properties CompanyInventors: Rui Yang, Guoping Mao
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Patent number: 5318877Abstract: A resist pattern on a substrate is formed using an imageable resist layer on the surface of a substrate. The imageable resist layer comprises a silicon-incorporated polystyrene-diene block copolymer having a silicon weight percent of at least about 5 percent. The imageable layer is prepared by reacting a polystyrene-diene block copolymer with a silicon-containing compound in the presence of a platinum catalyst. In a preferred embodiment, the poly(styrene)-diene block copolymers are hydrosilylated by hydrosiloxanes using a platinum-divinyl tetramethyl disiloxane catalyst.Type: GrantFiled: November 22, 1993Date of Patent: June 7, 1994Assignee: Cornell Research Foundation, Inc.Inventors: Christopher K. Ober, Allen H. Gabor, Eric A. Lehner, Guoping Mao, Lizabeth A. Schneggenburger
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Patent number: 5290397Abstract: A resist pattern on a substrate is formed using an imageable resist layer on the surface of a substrate. The imageable resist layer comprises a silicon-incorporated polystyrene-diene block copolymer having a silicon weight percent of at least about 5 percent. The imageable layer is prepared by reacting a polystyrene-diene block copolymer with a silicon-containing compound in the presence of a platinum catalyst. In a preferred embodiment, the poly(styrene)-diene block copolymers are hydrosilylated by hydrosiloxanes using a platinum-divinyl tetramethyl disiloxane catalyst.Type: GrantFiled: August 21, 1992Date of Patent: March 1, 1994Assignee: Cornell Research Foundation, Inc.Inventors: Christopher K. Ober, Allen H. Gabor, Eric A. Lehner, Guoping Mao, Lizabeth A. Schneggenburger