| 摘要 |
PROBLEM TO BE SOLVED: To provide a superfine coaxial cable with excellent conductivity, on an insulating layer of which foamed cells are uniformly formed and in which a dielectric constant does not show a local variation but becomes uniform. SOLUTION: The superfine coaxial cable is provided with an internal conductor, an insulating layer provided with foamed cells which are formed to surround the internal conductor, a super-foamed shutoff layer formed to surround the insulating layer so that the foamed cells can be formed uniformly, metallic shielding layer formed to surround the super-foamed shielding layer, and a protecting cover layer formed to surround the metallic shielding layer. A provision of the super-foamed shutoff layer controls an abnormal growth of foamed cells formed on the insulating layer and makes a size of the foamed cells become uniform and foamed cells are formed neighboring with each other continuously, and the dielectric constant does not show a local difference and becomes uniform as a whole, and an excellent conductivity is attained. COPYRIGHT: (C)2008,JPO&INPIT
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