| 摘要 |
PURPOSE: A lead wire is provided to prevent a harmful pollution to human beings and environments and meet the characteristics by avoiding lead component as a coating layer. CONSTITUTION: A coating layer is an Sn-Bi alloy layer(40) mixed with Sn and Bi in a ratio of 87-97%: 3-13%. A Sn layer(30) inside the Sn-Bi alloy layer(40) is further formed to form a coating layer. The Sn layer(30) is coated around the peripheral surface of a wire(10) before forming the Sn-Bi alloy layer(40), thereby preventing a harmful pollution with respect to human beings and environments and meeting the characteristics by avoiding a lead component as the lead wire is coated. |
