To provide an electric wire for high frequency low in production cost and a method for determining the increase of surface area in a conductor part by which the surface area of the conductor part is efficiently increased in the number of recessed parts formed in a longitudinal direction on the outer peripheral surface of the conductor part and the conductivity of the high frequency current caused by the skin effect is improved and even the high-strength fine diameter wire of ≤1 mm diameter can be produced highly precisely at a high production efficiency.
In this electric wire, the conductor part 1 having round-shaped cross section is formed of a good electric conductor, and a plurality of recessed parts 2 having arc-shaped or U-shaped cross section drawn with the desired radius r on the surface are provided appropriately in the longitudinal direction X at the interval on the outer peripheral surface in the conductor part. The recessed parts are formed on the surface of the conductor part of diameter .
ONUMA KATSUYOSHI
| JPH0515218U | 1993-02-26 | |||
| JP16003609Y | ||||
| JP16003614Y |
Hiroshi Ochi
Sadao Matsumura
Isamu Kakiuchi