Patents by Inventor Chuji Shibuya

Chuji Shibuya 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).

  • Method of making flexible printed circuits
    Patent number: 4411982
    Abstract: A disclosed method of continuous making flexible printed circuits for use in radio set or the like appliances, includes punching holes in a continuous copper-film clad insulating substrate, forming photopolymer films on the faces of the copper films exposing the photopolymer film to photochemical light of a predetermined pattern, developing the exposed photopolymer film, etching the copper film utilizing remaining parts of the photopolymer film as etching masks, removing the remaining photopolymer films 40 and printing solder-resist films on selected parts. The improvement is to provide and retain selected oblong parts of said conductor metal film disposed on and parallel to longitudinal direction of the continuous substrate by, for example, covering these parts by etching-resist films.
    Type: Grant
    Filed: January 12, 1982
    Date of Patent: October 25, 1983
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Chuji Shibuya, Satoshi Kaneda, Takashi Kanehisa, Masatoshi Kondo, Kenji Nogawa, Fumio Hasuike