Patent ID: 7032307

Claim:
A method for fabricating probe pins, comprising: forming silicon pins rising in the vertical direction by crystal growth, each silicon pin having a tip, a side, and a bottom; coating the tip and the side of each silicon pin with a first metal forming an insulating layer filling up the space between the silicon pins to fix the silicon pins so that the tips of the silicon pins project from a top face of the insulating layer and that a bottom face of the insulating layer aligns with bottoms of the silicon pins; covering the bottom face of the insulating layer and the bottoms of the silicon pins with a second metal; heating the silicon pins, the insulating layer, and the first and second metals all together at a temperature above an alloy-forming temperature of silicon and the second metal and below an alloy-forming temperature of silicon and the first metal; removing a non-reacted second metal that has not been reacted with the silicon pins during the heating step; and forming a third metal on the bottoms of the silicon pins, from which the non-reacted second metal has been removed.