Patent ID: 9105994
Filing Date: 2015-08-11
Classification: G01R,H01R

Abstract:
1. A contact probe comprising: a plunger; a top contacting member provided at a tip end of the plunger and configured to be brought into contact with an electrode of a semiconductor device; a bottom contacting member which is configured to be brought into contact with an electrode of a testing board; and an elastic member for urging the top contacting member and the bottom contacting member in opposite directions away from each other, wherein the plunger is a cylindrical shape and includes a through-hole which penetrates through the plunger in an axial direction thereof, wherein the top contacting member includes a plurality of mountain-shaped sharp portions each including a peak formed in a direction projecting from the tip end of the plunger and a pair of ridges extending in an opposite direction from the projecting direction of the peak, wherein each of the sharp portions is asymmetrical with respect to a straight line that passes through the peak and extends along an axial direction of the plunger, each of the ridges of the pair of ridges is located on a same lateral side or opposite sides of the straight line that passes through .the peak and which extends along the axial direction of the plunger, wherein each of the sharp portions is bent toward a center line of the plunger, wherein one of the pair of ridges is longer than the other, and wherein, when the peak is in contact with the electrode of the semiconductor device, each of the sharp portions is elastically deformed toward the center line of the plunger and the electrode of the semiconductor device and the longer ridge of each of the sharp portions are in contact and slide against each other.