| 摘要 |
PROBLEM TO BE SOLVED: To maintain flexibility and restrain variation in a characteristic impedance by insulated cores are fusedly integrated in parallel per two or three cores from a one-side end in the lateral width direction across the length thereof, in a structure of a non-fused portion. SOLUTION: An insulating coating 1b is applied on the outer circumference of a stranded wire conductor 1a, by using an insulation material thermoplastic elastomer to thereby obtain one insulated core 1c. Two of the cores 1c are then arranged in parallel, and the insulating coatings 1b thereof are mutually fused to form a two-core juxtaposed line 1d being a core, and then necessary number of them are prepared and arranged parally in the lateral direction of a flat cable 1 to thereby form a non-fused part. Thereafter, the insulating coating 1b for the adjacent two-core juxtaposed line 1d is fused to form a fused part per prescribed interval in the lengthwide direction of the flat cable 1 by the fusion work. Since the non-fused part is fused as one unit for insulated core, the distance between insulated cores can be maintained constant.
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