Patents Assigned to Sumitomo Meta Mining Co., Ltd.
  • Publication number: 20080254256
    Abstract: A heat-resistant light-shading film having high light shading capacity, high heat resistance, high sliding characteristics, low surface gloss and high electroconductivity, and useful for optical device parts such as shutter blades or diaphragm blades for diaphragm blades of lens shutter and the like for digital cameras and digital video cameras and diaphragm blades of light intensity adjusting device for projectors, and a method for producing the same. The heat-resistant light-shading film is a film comprising a resin film substrate (A) having a heat resistance of 155° C. or higher and a light-shading layer (B) of crystalline metal carbide film (MeC) formed on one side or both sides of the resin film substrate (A), characterized in that the light-shading layer (B) has a thickness of 100 nm or more and a surface roughness of 0.1 to 2.1 ?m (arithmetic average height Ra), and content of carbon element (C) in the metal carbide film (MeC) is 0.3 or more in atomic number ratio to the total metal elements (Me).
    Type: Application
    Filed: January 29, 2008
    Publication date: October 16, 2008
    Applicant: Sumitomo Meta Mining Co., Ltd.
    Inventors: Yoshiyuki Abe, Katsushi Ono, Yukio Tsukakoshi