Patents Examined by Mark Naguno
  • Liquid crystal-dispersed polymeric film
    Patent number: 5466496
    Abstract: Liquid crystal films which are stable to light, moisture and heat, and which have an improved response time and viewing angle are provided by combining ferroelectric liquid crystals and a polymer matrix. The invention further provides for liquid crystal display elements utilizing the liquid crystal films of the invention. Still further, the invention provides methods of producing the liquid crystal films. According to the invention, liquid crystalline polymers having optical anisotropy as a polymer matrix and functional side chain radicals having an asymmetric carbon atom and dipole moment in the polymer matrix are matched with the dipole moment of the ferroelectric crystals.
    Type: Grant
    Filed: April 13, 1994
    Date of Patent: November 14, 1995
    Assignee: Samsung Electron Devices Co., Ltd.
    Inventor: Yong W. Jin
  • Anionically polymerizable monomers, polymers thereof and use of such polymers in photoresists
    Patent number: 5359101
    Abstract: Anionically polymerizable monomers containing at least one silicon or titanium atom form polymeric photoresists having good dry etch resistance for use in microlithography. The monomers are of the formula ##STR1## wherein A is --H or --CH.dbd.CH.sub.2 ; X is a strong electron withdrawing group;Y is a strong electron withdrawing group containing at least one silicon or titanium atom.Preferably Y is ##STR2## wherein n is 1-5 and R.sup.2, R.sup.3 and R.sup.4 are C.sub.1 -C.sub.10 alkyl. A particularly preferred monomer is 3-trimethylsilylpropyl 2-cyanoacrylate.Methods for applying a resist coating by vapor deposition of these monomers and exposure to radiation are described. A positive or negative tone image can be produced, depending upon the imaging method employed. The imaging layer may be applied over a planarizing layer to form a multilayer photoresist.
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: October 25, 1994
    Assignee: Loctite Ireland, Ltd.
    Inventors: John Woods, Pauline Coakley
  • Two-part adhesive
    Patent number: RE36140
    Abstract: A two-part adhesive consisting of a first liquid comprising 100 parts by weight of a polymerizable vinyl monomer and from 0.1 to 20 parts by weight of an organic peroxide and a second liquid comprising 100 parts by weight of a polymerizable vinyl monomer and from 0.05 to 15 parts by weight of a reducing agent, wherein either one or both of the first and second liquids contain from 0.4 to 5% by weight of water, and the content of water is more than 0.2% by weight based on the total amount of the first and second liquids.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: March 9, 1999
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Koichi Taguchi, Kinpei Iwata, Hideki Matsudo