Patents by Inventor Chenghong Li

Chenghong Li 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).

  • Patent number: 9728439
    Abstract: New compositions and methods of using those compositions as bonding compositions are provided. The compositions comprise a polymer dispersed or dissolved in a solvent system, and can be used to bond an active wafer to a carrier wafer or substrate to assist in protecting the active wafer and its active sites during subsequent processing and handling. The compositions form bonding layers that are chemically and thermally resistant, but that can also be softened to allow the wafers to slide apart at the appropriate stage in the fabrication process.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: August 8, 2017
    Assignee: Brewer Science Inc.
    Inventors: Sunil K. Pillalamarri, Chenghong Li
  • Publication number: 20120196225
    Abstract: A negative-tone photo patternable coating composition containing: (1) at least one silicone or organic-inorganic hybrid resin with acid labile alkoxysilane groups which can be thermally decomposed into silanol groups at 80-160° C. in the presence of a catalytic amount of strong acid; (2) optionally, an organic/polymer with two or more trialkoxysilyl, alkyldialkoxysilyl, or dialkylalkoxysilyl functional groups; (3) a photoacid generator; (4) an acid quencher; (5) a flow control agent; and (6) at least one organic solvent. Methods of preparing the silicones and/or organic-inorganic hybrids and procedures of processing the photo patternable compositions are described.
    Type: Application
    Filed: January 27, 2011
    Publication date: August 2, 2012
    Applicant: NAMITEK SPECIALTY MATERIALS CORP.
    Inventor: CHENGHONG LI
  • Patent number: 8202442
    Abstract: New protective coating layers for use in wet etch processes during the production of semiconductor and MEMS devices are provided. The layers include a primer layer, a first protective layer, and an optional second protective layer. The primer layer preferably comprises an organo silane compound in a solvent system. The first protective layer includes thermoplastic copolymers prepared from styrene, acrylonitrile, and optionally other addition-polymerizable monomers such as (meth)acrylate monomers, vinylbenzyl chloride, and diesters of maleic acid or fumaric acid. The second protective layer comprises a highly halogenated polymer such as a chlorinated polymer which may or may not be crosslinked upon heating.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: June 19, 2012
    Assignee: Brewer Science Inc.
    Inventors: Chenghong Li, Kimberly A. Yess, Tony D. Flaim
  • Patent number: 8193274
    Abstract: In accordance with the present invention, compositions are described which are useful, for example, for the preparation of metal-clad laminate structures, methods for the preparation thereof, and various uses therefor. Invention metal-clad laminate structures are useful, for example, multi-layer board (MLB) industry, in the preparation of burn-in test boards and high reliability boards, applications where low coefficient of thermal expansion (CTE) is beneficial, in the preparation of boards used in down-hole drilling, and the like.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: June 5, 2012
    Assignee: Arlon
    Inventors: Sam Najjar, Chenghong Li, Thomas Allan Koes, Daniel Chang
  • Publication number: 20100291475
    Abstract: The present Invention relates to a novel polymer comprising a unit where S is a siloxane chain or an inorganic/organic hybrid chain; L is a thermally labile group; R1 is alkyl, aryl, alkaryl, —O-L, or 13 O—S; and R2 is alkyl, aryl, alkaryl, S or L; and n is an integer. The invention also relates to compositions comprising the novel polymer and their use.
    Type: Application
    Filed: May 12, 2009
    Publication date: November 18, 2010
    Inventor: Chenghong Li
  • Publication number: 20100206479
    Abstract: New compositions and methods of using those compositions as bonding compositions are provided. The compositions comprise a polymer dispersed or dissolved in a solvent system, and can be used to bond an active wafer to a carrier wafer or substrate to assist in protecting the active wafer and its active sites during subsequent processing and handling. The compositions form bonding layers that are chemically and thermally resistant, but that can also be softened to allow the wafers to slide apart at the appropriate stage in the fabrication process.
    Type: Application
    Filed: April 29, 2010
    Publication date: August 19, 2010
    Applicant: BREWER SCIENCE INC.
    Inventors: Sunil K. Pillalamarri, Chenghong Li
  • Patent number: 7758913
    Abstract: New protective coating layers for use in wet etch processes during the production of semiconductor and MEMS devices are provided. The layers include a primer layer, a first protective layer, and an optional second protective layer. The primer layer preferably comprises an organo silane compound in a solvent system. The first protective layer includes thermoplastic copolymers prepared from styrene, acrylonitrile, and optionally other addition-polymerizable monomers such as (meth)acrylate monomers, vinylbenzyl chloride, and diesters of maleic acid or fumaric acid. The second protective layer comprises a highly halogenated polymer such as a chlorinated polymer which may or may not be crosslinked upon heating.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: July 20, 2010
    Assignee: Brewer Science Inc.
    Inventors: Chenghong Li, Kimberly A. Ruben, Tony D. Flaim
  • Patent number: 7695890
    Abstract: New photoresists for use during the production of semiconductor and MEMS devices are provided. The primer layer preferably comprises a silane dissolved or dispersed in a solvent system. The photoresist layer includes copolymers prepared from styrene, acrylonitrile, and epoxy-containing monomers. The photoresist layer comprises a photoacid generator, and is preferably negative-acting.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: April 13, 2010
    Assignee: Brewer Science Inc.
    Inventors: Xing-Fu Zhong, Jyoti K. Malhotra, Chenghong Li
  • Publication number: 20090176918
    Abstract: In accordance with the present invention, compositions are described which are useful, for example, for the preparation of metal-clad laminate structures, methods for the preparation thereof, and various uses therefor. Invention metal-clad laminate structures are useful, for example, multi-layer board (MLB) industry, in the preparation of burn-in test boards and high reliability boards, applications where low coefficient of thermal expansion (CTE) is beneficial, in the preparation of boards used in down-hole drilling, and the like.
    Type: Application
    Filed: January 8, 2008
    Publication date: July 9, 2009
    Inventors: Ousama Najjar, Chenghong Li, Thomas Allan Koes, Daniel Chang
  • Publication number: 20090176106
    Abstract: In accordance with the present invention, compositions are described which are useful, for example, for the preparation of metal-clad laminate structures, methods for the preparation thereof, and various uses therefor. Invention metal-clad laminate structures are useful, for example, multi-layer board (MLB) industry, in the preparation of burn-in test boards and high reliability boards, applications where low coefficient of thermal expansion (CTE) is beneficial, in the preparation of boards used in down-hole drilling, and the like.
    Type: Application
    Filed: August 1, 2008
    Publication date: July 9, 2009
    Inventors: Sam Najjar, Chenghong Li, Thomas Allan Koes, Daniel Chang
  • Publication number: 20080200011
    Abstract: New compositions and methods of using those compositions as bonding compositions are provided. The compositions comprise a polymer dispersed or dissolved in a solvent system, and can be used to bond an active wafer to a carrier wafer or substrate to assist in protecting the active wafer and its active sites during subsequent processing and handling. The compositions form bonding layers that are chemically and thermally resistant, but that can also be softened to allow the wafers to slide apart at the appropriate stage in the fabrication process.
    Type: Application
    Filed: June 14, 2007
    Publication date: August 21, 2008
    Inventors: Sunil K. Pillalamarri, Chenghong Li
  • Patent number: 7364832
    Abstract: A novel process for using a hard mask or protective layer in conjunction with an extremely thin photoresist is provided. In this process, a thin film of the protective layer is coated on the surface of a substrate that is to be selectively modified by reactive ion etch (RIE). The protective layer is photosensitive and anti-reflective. An extremely thin photoresist layer is coated on top of the protective layer. The stack of the films is selectively exposed to actinic radiation at a wavelength determined by the sensitivities of the protective layer and photoresist layer. The latent images on the photoresist and protective layers resulting from the exposure are developed with a common alkaline developer. The three dimensional patterns of photoresist and underlying protective layer are formed simultaneously by the single exposure and single development. When the underlying substrate is etched by RIE, the protective layer is the masking layer, not the photoresist.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: April 29, 2008
    Assignee: Brewer Science Inc.
    Inventors: Sam X. Sun, Chenghong Li
  • Publication number: 20080041815
    Abstract: New protective coating layers for use in wet etch processes during the production of semiconductor and MEMS devices are provided. The layers include a primer layer, a first protective layer, and an optional second protective layer. The primer layer preferably comprises an organo silane compound in a solvent system. The first protective layer includes thermoplastic copolymers prepared from styrene, acrylonitrile, and optionally other addition-polymerizable monomers such as (meth)acrylate monomers, vinylbenzyl chloride, and diesters of maleic acid or fumaric acid. The second protective layer comprises a highly halogenated polymer such as a chlorinated polymer which may or may not be crosslinked upon heating.
    Type: Application
    Filed: September 17, 2007
    Publication date: February 21, 2008
    Inventors: Chenghong Li, Kimberly Ruben, Tony Flaim, Kimberly Yess
  • Patent number: 7316844
    Abstract: New protective coating layers for use in wet etch processes during the production of semiconductor and MEMS devices are provided. The layers include a primer layer, a first protective layer, and an optional second protective layer. The primer layer preferably comprises an organo silane compound in a solvent system. The first protective layer includes thermoplastic copolymers prepared from styrene, acrylonitrile, and optionally other addition-polymerizable monomers such as (meth)acrylate monomers, vinylbenzyl chloride, and diesters of maleic acid or fumaric acid. The second protective layer comprises a highly halogenated polymer such as a chlorinated polymer which may or may not be crosslinked upon heating.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: January 8, 2008
    Assignee: Brewer Science Inc.
    Inventors: Chenghong Li, Kimberly A. Ruben, Tony D. Flaim
  • Publication number: 20070075309
    Abstract: New photoresists for use during the production of semiconductor and MEMS devices are provided. The primer layer preferably comprises a silane dissolved or dispersed in a solvent system. The photoresist layer includes copolymers prepared from styrene, acrylonitrile, and epoxy-containing monomers. The photoresist layer comprises a photoacid generator, and is preferably negative-acting.
    Type: Application
    Filed: September 6, 2006
    Publication date: April 5, 2007
    Inventors: Xing-Fu Zhong, Jyoti Malhotra, Chenghong Li
  • Patent number: 7132557
    Abstract: Disclosed are compounds produced by a process comprising the step of reacting an amine reactant with an epoxide reactant to form a hydrolytically stable carbon-nitrogen bond therebetween, wherein at least one of the amine or epoxide reactants comprises a terminal alkoxysiyl group. Also disclosed are curable compositions comprising the compounds of the present invention and the cured products derived therefrom.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: November 7, 2006
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Garth L. Wilkes, Chenghong Li
  • Publication number: 20060240181
    Abstract: New protective coating layers for use in wet etch processes during the production of semiconductor and MEMS devices are provided. The layers include a primer layer, a first protective layer, and an optional second protective layer. The primer layer preferably comprises an organo silane compound in a solvent system. The first protective layer includes thermoplastic copolymers prepared from styrene, acrylonitrile, and optionally other addition-polymerizable monomers such as (meth)acrylate monomers, vinylbenzyl chloride, and diesters of maleic acid or fumaric acid. The second protective layer comprises a highly halogenated polymer such as a chlorinated polymer which may or may not be crosslinked upon heating.
    Type: Application
    Filed: June 30, 2006
    Publication date: October 26, 2006
    Inventors: Chenghong Li, Kimberly Ruben, Tony Flaim
  • Publication number: 20050158538
    Abstract: New protective coating layers for use in wet etch processes during the production of semiconductor and MEMS devices are provided. The layers include a primer layer, a first protective layer, and an optional second protective layer. The primer layer preferably comprises an organo silane compound in a solvent system. The first protective layer includes thermoplastic copolymers prepared from styrene, acrylonitrile, and optionally other addition-polymerizable monomers such as (meth)acrylate monomers, vinylbenzyl chloride, and diesters of maleic acid or fumaric acid. The second protective layer comprises a highly halogenated polymer such as a chlorinated polymer which may or may not be crosslinked upon heating.
    Type: Application
    Filed: January 16, 2004
    Publication date: July 21, 2005
    Inventors: Chenghong Li, Kimberly Ruben, Tony Flaim
  • Publication number: 20050074699
    Abstract: A novel process for using a hard mask or protective layer in conjunction with an extremely thin photoresist is provided. In this process, a thin film of the protective layer is coated on the surface of a substrate that is to be selectively modified by reactive ion etch (RIE). The protective layer is photosensitive and anti-reflective. An extremely thin photoresist layer is coated on top of the protective layer. The stack of the films is selectively exposed to actinic radiation at a wavelength determined by the sensitivities of the protective layer and photoresist layer. The latent images on the photoresist and protective layers resulting from the exposure are developed with a common alkaline developer. The three dimensional patterns of photoresist and underlying protective layer are formed simultaneously by the single exposure and single development. When the underlying substrate is etched by RIE, the protective layer is the masking layer, not the photoresist.
    Type: Application
    Filed: June 8, 2004
    Publication date: April 7, 2005
    Inventors: Sam Sun, Chenghong Li
  • Publication number: 20030153777
    Abstract: Disclosed are compounds produced by a process comprising the step of reacting an amine reactant with an epoxide reactant to form a hydrolytically stable carbon-nitrogen bond therebetween, wherein at least one of the amine or epoxide reactants comprises a terminal alkoxysiyl group. Also disclosed are curable compositions comprising the compounds of the present invention and the cured products derived therefrom.
    Type: Application
    Filed: November 19, 2002
    Publication date: August 14, 2003
    Inventors: Garth L. Wilkes, Chenghong Li