Patents Assigned to Nitto Electric Industrial Co., Ltd.
  • Patent number: 6010782
    Abstract: A thin adhesive sheet for working semiconductor wafers is described, comprising a light-permeable support and a pressure-sensitive adhesive layer on the support, wherein the adhesive layer is a composition comprising 100 parts by weight of a base polymer, from 1 to 100 parts by weight of a low molecular weight compound containing at least two photopolymerizable carbon--carbon double bonds in the molecule, and from 0.1 to 5 parts by weight of a photopolymerization initiator. This adhesive sheet is firmly bonded to a semiconductor wafer during the wafer cutting process, the adhesive force of the adhesive sheet is markedly reduced. As a result, the pick-up operation can be carried out easily. This adhesive sheet is useful in working semiconductor wafers.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: January 4, 2000
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Gosei Uemura, Yoshinari Satoda, Eiji Shigemura
  • Patent number: 5714029
    Abstract: A thin adhesive sheet for working semiconductor wafers is described, comprising a light-permeable support and a pressure-sensitive adhesive layer on the support, wherein the adhesive layer is a composition comprising 100 parts by weight of a base polymer, from 1 to 100 parts by weight of a low molecular weight compound containing at least two photopolymerizable carbon-carbon double bonds in the molecule, and from 0.1 to 5 parts by weight of a photopolymerization initiator. This adhesive sheet is firmly bonded to a semiconductor wafer during the wafer cutting process, the adhesive force of the adhesive sheet is markedly reduced. As a result, the pick-up operation can be carried out easily. This adhesive sheet is useful in working semiconductor wafers.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: February 3, 1998
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Gosei Uemura, Yoshinari Satoda, Eiji Shigemura
  • Patent number: 5637395
    Abstract: A thin adhesive sheet for working semiconductor wafers is described, comprising a light-permeable support and a pressure-sensitive adhesive layer on the support, wherein the adhesive layer is a composition comprising 100 parts by weight of a base polymer, from 1 to 100 parts by weight of a low molecular weight compound containing at least two photopolymerizable carbon-carbon double bonds in the molecule, and from 0.1 to 5 parts by weight of a photopolymerization initiator. This adhesive sheet is firmly bonded to a semiconductor wafer during the wafer cutting process whereafter and during the wafer polishing process. After irradiation, the adhesive force of the adhesive sheet is markedly reduced. As a result, the pick-up operation can be carried out easily. This adhesive sheet is useful in working semiconductor wafers.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: June 10, 1997
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Gosei Uemura, Yoshinari Satoda, Eiji Shigemura
  • Patent number: 5176916
    Abstract: A medical adhesive comprising a plaster layer containing the following ingredients, characterized in that the ingredient 2 is incorporated in a larger amount than the ingredient 5 and in an amount not less than 25% by weight relative to the total amount of the ingredients 1.about.5, and the plaster layer is a W/O type:1 a medicinal ingredient,2 a hydrophobic polymer having a glass transition temperature (Tg) of -65.degree. C. to 35.degree. C.3 a percutaneous absorption-promoting agent,4 water, and5 a hydrophilic polymer which is soluble or capable of swelling in water; anda medical adhesive which comprises a porous base layer in the plaster layer or in contact with the plaster layer, which enable stable release of the medicinal ingredient, the percutaneous absorption-promoting agents and so on and sustaining of the pharmacological effects over a long period.
    Type: Grant
    Filed: April 17, 1991
    Date of Patent: January 5, 1993
    Assignees: Nitto Electric Industrial Co., Ltd., Takeda Chemical Industries, Ltd.
    Inventors: Akihito Yamanaka, Saburo Otsuka, Yoshifumi Hosaka
  • Patent number: 5059628
    Abstract: A medical composition for external use comprising a proline ester represented by formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are as defined in the specification, or a prolinol ester represented by formula (II): ##STR2## wherein R.sub.3 and R.sub.4 are as defined in the specification. The composition enhances percutaneous penetration absorption of an active ingredient to be combined therewith.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: October 22, 1991
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Yoko Tsuda, Susumu Satoh, Tetsuo Omata
  • Patent number: 4963494
    Abstract: An enzyme immobilized membrane comprising an anisotropic ultrafiltration membrane having a porous layer and a dense layer, and an enzyme immobilized therein is disclosed. The porous layer of the ultrafiltration membrane retains a water-soluble polymer having at least two functional groups in the crosslinked state, and the enzyme is covalently bonded to the membrane through the functional groups of the polymer. Preferably, the membrane is prepared from polysulfone. The enzyme immobilized membrane is produced by a process which comprises impregnating a solution of the water-soluble polymer into the porous layer of the ultrafiltration membrane under a pressure of 0.1 to 1.0 kg/cm.sup.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: October 16, 1990
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Ken Hibino, Takeshi Okada, Kazuo Nakao, Yuko Sahashi
  • Patent number: 4962043
    Abstract: A simplified detection implement for use in the biological or chemical tests such as medical, pharmaceutical, microbiological, enzymological or analytical tests comprising an adhesive sheet (1) having an adhesion material layer (4), the adhesion sheet (1) also having an area "a" in an optimal shape and an area "b" in an optimal shape with a folding line (6) at the border of areas "a" and "b"; a small test material (3) adhered to the adhesion material layer (4) and being placed approximately at the center of area "a" of the adhesive sheet (1); and a peelable protection sheet (2) covering the surface of the adhesion material layer (4) and having an opening (5) big enough to expose the whole surface of the small test material (3) as well as being so positioned to expose the small test material (3) when areas "a" and "b" are overlapped by folding the adhesive sheet (1) at the folding line (6), and when areas "a" and "b" being overlapped the majority or part of area "a" of the adhesive sheet (1) acts as the adhesi
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: October 9, 1990
    Assignees: Showa Yakuhin Kako Co., Ltd, Nitto Electric Industrial Co., Ltd.
    Inventors: Moriharu Nagase, Mutsumi Shibuya, Kuniaki Asami, Katsuo Matsumoto, Hikaru Teranishi, Sukeo Saito
  • Patent number: 4954343
    Abstract: A dermal pharmaceutical preparation comprising a soft support having provided thereon a pressure-sensitive adhesive layer containing a pressure-sensitive adhesive and a drug, wherein said pressure-sensitive adhesive is a copolymer comprising a (meth)acrylamide having an amino group as a comonomer unit. The preparation remains the drug in a dissolved state and is excellent in drug liberation and adhesion to the skin.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: September 4, 1990
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Yoshifumi Hosaka, Saburo Otsuka, Takashi Kinoshita, Yusuke Ito
  • Patent number: 4935175
    Abstract: A mold-cleaning composition and sheet comprising an uncured rubber composition comprising an uncured rubber and a curing agent, and at least one removal aid selected from imidazoles and imidazolines, and a method for cleaning a mold using the mold-cleaning sheet, are disclosed. The mold-cleaining sheet is suitably used to clean molding surfaces of a mold or to remove contaminants such as burr formed at peripheries thereof in the continuous production of semiconductor devices by transfer molding.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: June 19, 1990
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Toshihiko Kitaura, Akio Nakamura, Masayuki Sakamoto, Kouichi Takashima, Kiyotaka Hirakawa, Matao Mizota
  • Patent number: 4921703
    Abstract: A vermin exterminating element comprising a culture carrier having culture medium components containing vermin infectious microorganisms and/or the spores of the vermin infectious microorganisms cultivated therein, and a vermin exterminating method using the same.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: May 1, 1990
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Toshio Higuchi, Ken Hibino, Rikako Yoshii, Takayuki Hiyori, Yoshinori Miyamoto, Eiichiro Fukusaki, Takeo Matsumura, Yoshiko Hashimoto, Michiko Kikuma, Yuko Sahashi, Takeshi Okada
  • Patent number: 4916009
    Abstract: A flexible printing base comprising a metal foil having formed thereon a polyimide layer is disclosed, wherein said metal foil has a centerline average roughness of not more than 0.7 .mu.m, and said polyimide mainly comprises a repeating unit represented by formula (I): ##STR1## and a repeating unit represented by formula (II): ##STR2## wherein l:m=x:y, wherein x represents a number not less than 45 and less than 70; y represents a number more than 30 and not more than 55; and x+y=100, said polyimide layer is formed by applying a solution of a polyamic acid mainly comprising a repeating unit represented by formula (III): ##STR3## and a repeating unit represented by formula (IV): ##STR4## wherein l and m are as defined above, in N,N'-dimethylformamide and/or N,N'-dimethylacetamide on a metal foil, followed by imidation. The flexible printing base is quite free from curling either in the state of a composite laminate but also in the state where the metal foil has been removed by etching.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: April 10, 1990
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Atsushi Hino, Yuzuru Noda
  • Patent number: 4903119
    Abstract: A semi-conductor device in which a semi-conductor element is sealed with a molding resin is disclosed. In the device, adhesion between a semi-conductor chip and the molding resin is achieved mainly by oxygen-crosslinking between silicon in the semi-conductor chip and silicon in the molding resin. The device exhibits excellent moisture-resistant reliability even after mounting.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: February 20, 1990
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Satoshi Ito, Akiko Kitayama, Takatoshi Hamada, Miho Yamaguchi
  • Patent number: 4880416
    Abstract: A dermal bandage comprising a film-like adhesive material comprising at least one of polycarboxylic acids and polycarboxylic acid anhydrides, and a vinyl accetate polymer, and a dermal preparation comprising a film-like adhesive material containing drug, comprising at least one of polycarboxylic acids and polycarboxylic acid anhydride, and a vinyl acetate polymer are disclosed. The dermal bandage and dermal preparation exhibit strong adhesion of long duration only upon water absorption and is useful for prevention of running off of drugs applied to the skin or protection of affected parts of the skin.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: November 14, 1989
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Tetsuo Horiuchi, Yuichi Inoue
  • Patent number: 4880895
    Abstract: A polyamide acid solution is disclosed, comprising a polyamide acid comprising as main components at least one recurring unit selected from the recurring units of the formulae (I) to (IV) and a recurring unit of formula (V), dissolved in an organic solvent comprising as a main component an amide type polar solvent having a boiling point of 170.degree. C. or less. The solution is capable of forming a polyimide film which has colorless transparency free from coloration and strong adhesion to a substrate for liquid crystal cell enough to prevent penetration of water into interface between the substrate and film. The solution is particularly useful for forming a liquid crystal oriented film.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: November 14, 1989
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Kazumi Higashi, Yuzuru Noda
  • Patent number: 4876330
    Abstract: A colorless transparent polyimide shaped article having as a main component at least one recurring unit selected from the recurring units of the formulae (I) to (IX). It is useful, for example, as an oriented film in liquid crystal display devices. The polyimide shaped article is produced by a process which comprises preparing a solution of a polyamide acid having as a main component at least one recurring unit selected from the recurring units of the formulae (V) to (VIII) in an amide-type organic polar solvent, forming a shaped article of the polyamide acid from the solution, and imidizing the resulting shaped article of the polyamide acid.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: October 24, 1989
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Kazumi Higashi, Yuzuru Noda
  • Patent number: 4874834
    Abstract: A colorless transparent polyimide shaped article having as a main component at least one recurring unit selected from the recurring units of the formulae (I) to (III), which is useful, for example, as an oriented film in liquid crystal display devices. The polyimide shaped article is produced by a process which comprises preparing a solution of (A) a polyimide precursor obtained by reacting a diamino compound comprising as a main component at least one aromatic diamine having amino groups at the m-position selected from diamines of formulae (IV) to (VI) with a tetracarboxylic acid compound comprising as a main component a tetracarboxylic acid dianhydride of formula (VII) dissolved in (B) at least one organic polar solvent selected from N,N-dimethylacetamide, N,N-dimethylformamide, bis(2-methoxyethyl)ether, cresol and halogenated phenols; forming a shaped article of the polyimide precursor from the solution; and imidizing the resulting shaped article.
    Type: Grant
    Filed: March 6, 1987
    Date of Patent: October 17, 1989
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Kazumi Higashi, Yuzuru Noda
  • Patent number: 4869979
    Abstract: A conducting organic polymer battery is disclosed, which comprises a cathode comprising a conducting organic polymer doped with a polymer anion having a number of anionic groups in the molecule thereof, an anode comprising a metal having a redox potential lower than that of the conducting organic polymer, and an electrolyte solution or a solid electrolyte as an ion conductive phase. In the battery, the ion concentration in an electrolyte solution does not substantially change during charging and discharging.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: September 26, 1989
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Akira Ohtani, Masao Abe, Hiroyuki Higuchi
  • Patent number: 4865677
    Abstract: A device for sticking adhesive tape to thin articles, such as semiconductor wafers, and trimming excess portions of said tape from the thin articles. A plurality of sticking rollers apply adhesive tape from a roll to each thin article, the tape having an adhesive side oriented towards an upper surface of the article and a width greater than a width of the article. A suction stage receives and holds each of the thin articles with the adhesive tape stuck thereto by said sticking rollers while a tape cutter trims the excess portion of the tape from along peripheral edge portions of the article. A tape peeling device then peels off the trimmed excess portions of the tape from the thin article, whereupon the thin article is conveyed back to a cassette.
    Type: Grant
    Filed: October 7, 1987
    Date of Patent: September 12, 1989
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Takao Matsushita, Akihiko Kira, Minoru Ametani
  • Patent number: 4863952
    Abstract: A composition for percutaneous drug administration which contains a compound of the general formula ##STR1## wherein R.sub.1 is a hydrogen atom or an alkyl group and R.sub.2 is a residue of aliphatic hydrocarbon.The composition is capable of promoting percutaneous drug absorption.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: September 5, 1989
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Yoko Abe, Susumu Satoh, Yoshiaki Itoh
  • Patent number: 4864056
    Abstract: Methyl (2S,3S,4R)-(+)- and (2R,3R,4S)-(-)-3-hydroxy-2,4-dimethylheptanoates which are important intermediates for synthesis of invictolide, one component of a queen recognition pheromone of red imported fire ant.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: September 5, 1989
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Shuji Senda, Yutaka Nakazono, Kenji Mori