Patents by Inventor Wenjie Li

Wenjie 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).

  • Publication number: 20060216643
    Abstract: A positive photoresist composition comprises a radiation sensitive acid generator, and a polymer that includes a first repeating unit derived from a sulfonamide monomer including a fluorosulfonamide functionality, a second repeating unit having a pendant acid-labile moiety, and a third repeating unit having a lactone functionality. The positive photoresist composition may be used to form patterned features on a substrate, such as those used in the manufacture of a semiconductor device.
    Type: Application
    Filed: May 23, 2006
    Publication date: September 28, 2006
    Applicant: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara Varanasi
  • Patent number: 7081326
    Abstract: A negative photoresist composition and a method of patterning a substrate through use of the negative photoresist composition. The composition includes: a radiation sensitive acid generator; a multihydroxy-containing additive; and a resist polymer comprising a first repeating unit from a first monomer. The resist polymer may also comprise a second repeating unit from a second monomer, wherein the second monomer has an aqueous base soluble moiety. The multihydroxy-containing additive has the structure Q-(OH)m, where Q may include at least one alicycic group and m may be any integer between 2 and 6. The acid generator is adapted to generate an acid upon exposure to radiation. The resist polymer is adapted to chemically react with the additive in the presence of the acid to generate a product that is insoluble in a developer solution.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: July 25, 2006
    Assignee: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara R. Varanasi
  • Patent number: 7063931
    Abstract: A positive photoresist composition comprises a radiations sensitive acid generator, and a polymer that may include a first repeating unit derived from a sulfonamide monomer including a fluorosulfonamide functionality, and a second repeating unit, which may include a pendant acid-labile moiety. The positive photoresist composition may also comprise at least one of a solvent, a quencher, and a surfactant. A patterned photoresist layer, made of the positive photoresist composition, may be formed on a substrate, the positive photoresist layer may be exposed to a pattern of imaging radiation, a portion of the positive photoresist layer that is exposed to the pattern of imaging radiation may be removed to reveal a correspondingly patterned substrate for subsequent processing in the manufacture of a semiconductor device.
    Type: Grant
    Filed: January 8, 2004
    Date of Patent: June 20, 2006
    Assignee: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara Rao Varanasi
  • Publication number: 20060127800
    Abstract: The resist compositions having an acid sensitive imaging polymer and a radiation sensitive acid generator component comprising: (i) a first radiation sensitive acid generator selected from the group consisting of dissolution-inhibiting acid generators, and (ii) a second radiation sensitive acid generator selected from the group consisting of unprotected acidic group-functionalized acid generators and acid labile group-protected acidic group-functionalized radiation sensitive acid generators; enables formation of high sensitivity resists suitable for use in EPL, EUV, soft x-ray, and other low energy intensity lithographic imaging applications. The resist compositions may be useful in other lithographic processes as well.
    Type: Application
    Filed: December 5, 2002
    Publication date: June 15, 2006
    Inventors: Wu-Song Huang, Wenjie Li, Wayne Moreau, David Medeiros, Karen Petrillo, Robert Lang, Marie Angelopoulos
  • Publication number: 20060105269
    Abstract: A photoresist composition including a polymer is disclosed, wherein the polymer includes at least one monomer having the formula: where R1 represents hydrogen (H), a linear, branched or cyclo alkyl group of 1 to 20 carbons, a semi- or perfluorinated linear, branched or cyclo alkyl group of 1 to 20 carbons or CN; R2 represents an alicyclic group of 5 or more carbon atoms; X represents a methylene, ether, ester, amide or carbonate linkage; R3 represents a linear or branched alkylene group or semi- or perfluorinated linear or branched alkylene group with 1 or more carbon atoms; R4 represents hydrogen (H), methyl (CH3), trifluoromethyl (CF3), difluoromethyl (CHF2), fluoromethyl (CH2F), or a semi- or perflourinated aliphatic group; R5 represents trifluoromethyl (CF3), difluoromethyl (CHF2), fluoromethyl (CH2F), or a semi- or perfluorinated substituted or unsubstituted aliphatic group; n represents an integer of 1 or more; and OR12 represents OH or at least one acid labile group selected from a tertiary alkyl
    Type: Application
    Filed: November 12, 2004
    Publication date: May 18, 2006
    Applicant: International Business Machines Corporation
    Inventors: Mahmoud Khojasteh, Pushkara Varanasi, Wenjie Li, Kuang-Jung Chen, Kaushal Patel
  • Publication number: 20060089000
    Abstract: In the back end of integrated circuits employing low-k interlevel dielectrics, etched structures are filled with a planarizing material comprising a cyclic olefin polymer and solvent; the next pattern to be etched is defined in a photosensitive layer above the planarizing layer; the pattern is etched in the dielectric and the planarizing material is stripped in a wet process that does not damage the interlevel dielectric.
    Type: Application
    Filed: October 26, 2004
    Publication date: April 27, 2006
    Applicant: International Business Machines Corporation
    Inventors: Ronald Della Guardia, Ranee Kwong, Wenjie Li, Qinghuang Lin, Dirk Pfeiffer, David Rath
  • Patent number: 7011923
    Abstract: A negative photoresist composition and a method of patterning a substrate through use of the negative photoresist composition. The negative photoresist composition comprises a radiation sensitive acid generator, a first polymer containing an alkoxymethyl amido group and a hydroxy-containing second polymer. The first and second polymers may also have a repeating unit having an aqueous base soluble moiety. The first and second polymers undergo acid catalyzed crosslinking upon exposure of the acid to radiation, producing a product that is insoluble in an aqueous alkaline developer solution.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: March 14, 2006
    Assignee: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara R. Varanasi
  • Publication number: 20060035167
    Abstract: A barrier layer for fabricating at least one of a device and a mask includes a polymeric photoacid generator formed between a substrate and a resist layer. The barrier layer may be used, for example, in forming a resist image, and forming a patterned material feature on a substrate.
    Type: Application
    Filed: August 12, 2004
    Publication date: February 16, 2006
    Applicant: International Business Machines Corporation
    Inventors: Marie Angelopoulos, Gregory Breyta, Wu-Song Huang, Robert Lang, Wenjie Li, David Medeiros, Wayne Moreau, Karen Petrillo
  • Patent number: 6991890
    Abstract: A negative photoresist composition and a method of patterning a substrate through use of the negative photoresist composition. The composition includes: a radiation sensitive acid generator; an additive; and a resist polymer derived from at least one first monomer including a hydroxy group. The first monomer may be acidic or approximately pH neutral. The resist polymer may be further derived from a second monomer having an aqueous base soluble moiety. The additive may include one or more alicyclic structures. The acid generator is adapted to generate an acid upon exposure to radiation. The resist polymer is adapted to chemically react with the additive in the presence of the acid to generate a non-crosslinking reaction product that is insoluble in an aqueous alkaline developer solution.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: January 31, 2006
    Assignee: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara R. Varanasi, Alyssandrea H. Hamad
  • Publication number: 20050266354
    Abstract: A top coat material for applying on top of a photoresist material is disclosed. The top coat material includes a polymer, which includes at least one fluorosulfonamide monomer unit having one of the following two structures: wherein: M is a polymerizable backbone moiety; Z is a linking moiety selected from the group consisting of —C(O)O—, —C(O)—, —OC(O)—, and —O—C(O)—C(O)—O—; R1 is selected from the group consisting of an alkylene, an arylene, a semi- or perfluorinated alkylene, and a semi- or perfluorinated arylene; p and q are 0 or 1; R2 is selected from the group consisting of hydrogen, fluorine, an alkyl group of 1 to 6 carbons, and a semi- or perfluorinated alkyl group of 1 to 6 carbons; n is an integer from 1 to 6; and R3 is selected from the group consisting of hydrogen, an alkyl, an aryl, a semi- or perfluorinated alkyl, and a semi- or perfluorinated aryl. The top coat material may be used in lithography processes, wherein the top coat material is applied on a photoresist layer.
    Type: Application
    Filed: May 27, 2004
    Publication date: December 1, 2005
    Inventors: Wenjie Li, Margaret Lawson, Pushkara Varanasi
  • Publication number: 20050238675
    Abstract: Aqueous liquid or gel formulations of fat soluble vitamins, essential nutrients and other pharmaceutical agents have enhanced concentration of the active components relative to known compositions and therefore have enhanced bioavailability. The aqueous solutions or gels form a free flowing powder when they are absorbed on a suitable pharmaceutically acceptable solid carrier, such as silicon dioxide, maltodextrin, magnesium oxide, aluminum hydroxide, magnesium trisilicate, starch or sugars, or encapsulated by polymers such as gelatin, pectin, chitosan and the like.
    Type: Application
    Filed: April 19, 2005
    Publication date: October 27, 2005
    Inventors: Wenjie Li, Amy Nguyen, Edward Alosio, Bricini Dema-Ala
  • Publication number: 20050227167
    Abstract: A negative photoresist composition and a method of patterning a substrate through use of the negative photoresist composition. The negative photoresist composition comprises a radiation sensitive acid generator, a first polymer containing an alkoxymethyl amido group and a hydroxy-containing second polymer. The first and second polymers may also have a repeating unit having an aqueous base soluble moiety. The first and second polymers undergo acid catalyzed crosslinking upon exposure of the acid to radiation, producing a product that is insoluble in an aqueous alkaline developer solution.
    Type: Application
    Filed: April 7, 2004
    Publication date: October 13, 2005
    Applicant: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara Varanasi
  • Patent number: 6949325
    Abstract: A negative resist composition is disclosed, wherein the resist composition includes a polymer having at least one fluorosulfonamide monomer unit having one of the following two formulae: wherein: M is a polymerizable backbone moiety; Z is a linking moiety selected from the group consisting of —C(O)O—, —C(O)—, —OC(O)—, —O—C(O)—C(O)—O—, or alkyl; P is 0 or 1; R1 is a linear or branched alkyl group of 1 to 20 carbons; R2 is hydrogen, fluorine, a linear or branched alkyl group of 1 to 6 carbons, or a semi- or perfluorinated linear or branched alkyl group of 1 to 6 carbons; and n is an integer from 1 to 6.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: September 27, 2005
    Assignee: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara Rao Varanasi
  • Publication number: 20050202339
    Abstract: A negative photoresist composition and a method of patterning a substrate through use of the negative photoresist composition. The composition includes: a radiation sensitive acid generator; a multihydroxy-containing additive; and a resist polymer comprising a first repeating unit from a first monomer. The resist polymer may also comprise a second repeating unit from a second monomer, wherein the second monomer has an aqueous base soluble moiety. The multihydroxy-containing additive has the structure Q-(OH)m, where Q may include at least one alicycic group and m may be any integer between 2 and 6. The acid generator is adapted to generate an acid upon exposure to radiation. The resist polymer is adapted to chemically react with the additive in the presence of the acid to generate a product that is insoluble in a developer solution.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 15, 2005
    Applicant: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara Varanasi
  • Publication number: 20050175928
    Abstract: A negative photoresist composition and a method of patterning a substrate through use of the negative photoresist composition. The composition includes: a radiation sensitive acid generator; an additive; and a resist polymer derived from at least one first monomer including a hydroxy group. The first monomer may be acidic or approximately pH neutral. The resist polymer may be further derived from a second monomer having an aqueous base soluble moiety. The additive may include one or more alicyclic structures. The acid generator is adapted to generate an acid upon exposure to radiation. The resist polymer is adapted to chemically react with the additive in the presence of the acid to generate a non-crosslinking reaction product that is insoluble in an aqueous alkaline developer solution.
    Type: Application
    Filed: February 6, 2004
    Publication date: August 11, 2005
    Applicant: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara Varanasi, Alyssandrea Hamad
  • Publication number: 20050164507
    Abstract: A negative photoresist composition and a method of patterning a substrate through use of the negative photoresist composition. The composition includes: a radiation sensitive acid generator; a hydroxy-containing additive; and a resist polymer derived from at least one first monomer. The resist polymer may be further derived from a second monomer having an aqueous base soluble moiety. The hydroxy-containing additive has the structure of Q-OH, where Q may include one or more cyclic structures. Q-OH may have a primary alcohol structure. The acid generator is adapted to generate an acid upon exposure to radiation. The resist polymer is adapted to chemically react with the additive in the presence of the acid to generate a non-crosslinking reaction product that is insoluble in an aqueous alkaline developer solution.
    Type: Application
    Filed: January 28, 2004
    Publication date: July 28, 2005
    Inventors: Wenjie Li, Pushkara Varanasi
  • Publication number: 20050153232
    Abstract: A positive photoresist composition comprises a radiations sensitive acid generator, and a polymer that may include a first repeating unit derived from a sulfonamide monomer including a fluorosulfonamide functionality, and a second repeating unit, which may include a pendant acid-labile moiety. The positive photoresist composition may also comprise at least one of a solvent, a quencher, and a surfactant. A patterned photoresist layer, made of the positive photoresist composition, may be formed on a substrate, the positive photoresist layer may be exposed to a pattern of imaging radiation, a portion of the positive photoresist layer that is exposed to the pattern of imaging radiation may be removed to reveal a correspondingly patterned substrate for subsequent processing in the manufacture of a semiconductor device.
    Type: Application
    Filed: January 8, 2004
    Publication date: July 14, 2005
    Applicant: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara Varanasi
  • Patent number: 6902874
    Abstract: Acid-catalyzed positive resist compositions which are imageable with 193 nm radiation and/or possibly other radiation and are developable to form resist structures of improved development characteristics and improved etch resistance are enabled by the use of resist compositions containing imaging polymer having a 2-cyano acrylic monomer.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: June 7, 2005
    Assignee: International Business Machines Corporation
    Inventors: Wenjie Li, Pushkara Rao Varanasi
  • Patent number: 6890961
    Abstract: A clear aqueous formulation for topical application in the oral cavity of humans to treat leukoplakia contains water, ?-carotene, a water miscible polyol, an unsaturated fatty acid ester, and a surfactant, preferably polyethoxylated castor oil or POE(20) sorbitan monooleate. The formulation preferably also contains a pharmaceutically acceptable anti-oxidant, preferably d-alpha-tocopherol (vitamin E), and is in the form of an oral rinse or as a gel well suited for spreading on gums or other parts of the oral cavity. The formulation is applied in a gel form on a substantially regular daily basis to areas in the oral cavity where leukoplakia lesions are present. Persistent application of the gel results in substantial diminution or total elimination of the leukoplakia lesions.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: May 10, 2005
    Assignee: Micelle Products, Inc.
    Inventors: Wenjie Li, Edward Alosio, David a. Rutolo, Jr., Brincini Faith Dema-Ala
  • Publication number: 20050058930
    Abstract: A negative resist composition is disclosed, wherein the resist composition includes a polymer having at least one fluorosulfonamide monomer unit having one of the following two formulae: wherein: M is a polymerizable backbone moiety; Z is a linking moiety selected from the group consisting of —C(O)O—, —C(O)—, —OC(O)—, —O—C(O)—C(O)—O—, or alkyl; P is 0 or 1; R1 is a linear or branched alkyl group of 1 to 20 carbons; R2 is hydrogen, fluorine, a linear or branched alkyl group of 1 to 6 carbons, or a semi- or perfluorinated linear or branched alkyl group of 1 to 6 carbons; and n is an integer from 1 to 6.
    Type: Application
    Filed: September 16, 2003
    Publication date: March 17, 2005
    Inventors: Wenjie Li, Pushkara Varanasi