Contact pin and socket for electrical parts

Abstract

A contact pin for an IC socket. The contact pin is formed from a metal material having conductivity and includes an elastic portion that is elastically deformable by a force applied thereto. A contact portion is formed at an end portion of the elastic portion and contacts an IC lead of an IC package. The elastic portion is polished to improve durability.

1 . A method of manufacturing a contact pin for a socket, comprising: 
 punching out a contact pin having a predetermined shape from a thin, conductive metal plate;    polishing the contact pin to provide a predetermined surface roughness; and    applying one or more metal platings to the polished contact pin to improve elastic strength of the contact pin.    
   
   
       2 . The method according to  claim 1 , wherein the predetermined surface roughness is achieved by removing an acute angle portion of a surface of the contact pin.  
   
   
       3 . The method according to  claim 1 , wherein said applying one or more metal platings to the polished contact pin comprises applying a nickel plating to increase thickness of the contact pin.  
   
   
       4 . The method according to  claim 3 , wherein said applying one or more metal platings to the polished contact pin further comprises applying a gold plating after application of the nickel plating.