Patents by Inventor Masaru Nagasawa

Masaru Nagasawa 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: 7788882
    Abstract: Provided are a packaging device and packaging method of a hollow cathode sputtering target which installs, in the hollow cathode sputtering target, a cover of a size capable of covering a void of the target; provides one or more through-holes to the cover; places a resin bag over them, and performs vacuum suction to the inside of the bag. This packaging device and packaging method of a hollow cathode sputtering target is capable of performing vacuum suction even to the inside of the hollow portion covered with the resin bag.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: September 7, 2010
    Assignee: Nippon Mining & Metals Co., Ltd.
    Inventors: Takeo Okabe, Masaru Nagasawa
  • Publication number: 20070131545
    Abstract: Provided are a packaging device and packaging method of a hollow cathode sputtering target which installs, in the hollow cathode sputtering target, a cover of a size capable of covering a void of the target; provides one or more through-holes to the cover; places a resin bag over them, and performs vacuum suction to the inside of the bag. This packaging device and packaging method of a hollow cathode sputtering target is capable of performing vacuum suction even to the inside of the hollow portion covered with the resin bag.
    Type: Application
    Filed: September 14, 2004
    Publication date: June 14, 2007
    Applicant: Nikko Materials Co., Ltd.
    Inventors: Takeo Okabe, Masaru Nagasawa
  • Patent number: 5772860
    Abstract: A high-purity titanium sputtering target having controlled crystal characteristics. The uniform problem of film thickness distribution on a substrate can be solved by adopting the requirements that (a) the average crystal grain diameters at various portions of the sputtering surface of the target are 500 .mu.m or less, preferably 100 .mu.m or less, and their dispersions are within .+-.20%, and (b) the defined orientation content ratios A have dispersions within .+-.20% and (c) a Ti target crystal structure has a recrystallization structure. The problems in connection with particle generation and lowered film forming rate in collimation sputtering can be solved by adopting the requirements that (d) said orientation content ratios A are is 80% or less, preferably 50% or less, and (e) the defined orientation content ratios B are 20% or less, as necessary, in combination with the aforementioned (a) to (c) requirements.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: June 30, 1998
    Assignee: Japan Energy Corporation
    Inventors: Susumu Sawada, Hideaki Fukuyo, Masaru Nagasawa
  • Patent number: 5693203
    Abstract: A sputtering target assembly composed of a sputtering target and a backing plate with or without an insert or inserts interposed therebetween as necessary characterized by having solid-phase bonded interface accompanied with no appreciable thermal diffusion layer and by said sputtering target substantially maintaining the quality characteristics including metallurgical characteristics and properties that the sputtering target had before it was bonded to the backing plate intact. The sputtering target assembly is obtained by solid-phase bonding the target and backing plate, with or without one or more insert sandwiched therebetween, at a low temperature and a low pressure under a vacuum. The solid-phase bonded interface gives reliable bonds of a bonded area percentage of 100% without non-bonded portions such as pores. The uniformity of microstructure and crystal orientation etc. of a target material is maintained intact with the suppression of crystal grain growth.
    Type: Grant
    Filed: September 14, 1994
    Date of Patent: December 2, 1997
    Assignee: Japan Energy Corporation
    Inventors: Tateo Ohhashi, Hideaki Fukuyo, Ichiroh Sawamura, Kenichirou Nakamura, Atsushi Fukushima, Masaru Nagasawa
  • Patent number: 5456815
    Abstract: A sputtering target of a high-purity Al or Al alloy having (1) a target crystal structure as a recrystallization structure and average grain diameters in various portions of 500 .mu.m or less, with dispersions within .+-.15%, and (2) a {200} crystalline orientation content ratio on the sputtering surface of at least 0.35 in various portions of the target, with dispersions within .+-.15%, said {200} crystalline orientation content ratio being defined by the following formula: ##EQU1## where I.sub.{200}, I.sub.{111}, I.sub.{220} and I.sub.{311} are peak strengths for (200), (111), (220) and (311) crystal planes, respectively, as obtained X-ray diffraction method. Simultaneous realization of (1)+(2) is desirable. For these purposes, uniform warm or cold working to a desired final geometry below the recrystallization temperature must be followed by uniform heat treatment throughout the target at the recrystallization temperature of the material to finish the recrystallization.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: October 10, 1995
    Assignee: Japan Energy Corporation
    Inventors: Hideaki Fukuyo, Susumu Sawada, Masaru Nagasawa