| 摘要 |
PURPOSE: To ensure stable contact of a contact terminal with an external connection terminal of an IC, etc. CONSTITUTION: One or more protruding parts 24 for contact having a radius of curvature in a specified range are formed in an area where a contact terminal 20 makes contact with an external connection terminal 50 of an IC, etc. In the area where contact is made with the external connection terminal 50, a multiplicity of projection parts 22 and recess parts 23 are formed, and a top part of each projection part is formed into a substantially spherical surface having a radius of curvature of 2 to 15 microns.
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