Patent ID: 7819672

Claim:
An electrical connecting apparatus attached to a board and electrically connecting a conductive portion formed on said board to an electrode of a device under test, comprising: a housing having a first recess extending in a first direction in a horizontal plane, opened downward, and having at least a backside inward surface and a plurality of slits spaced in said first direction and extending in a second direction intersecting said first direction in said horizontal plane, wherein each slit communicates at one end portion in its longitudinal direction with said first recess and is opened at least upward and downward; a plurality of contacts each arranged in said housing in a state of extending inside said slit from within said first recess, electrically connecting said conductive portion to said electrode, and each having a tip end projecting upward from said slit so as to be thrust to said electrode relatively, a back end directing to said backside inward surface, and an external surface curved and directing to said conductive portion; and a probe holder arranged in said first recess and abutting on a part opposite said external surface of said contact so as to bring said external surface of said contact into contact with said conductive portion, wherein said backside inward surface of said first recess includes a forward-inclined portion inclined to both said horizontal plane and a vertical plane, and a rearward-inclined portion inclined to both said horizontal plane and said vertical plane, the forward-inclined portion and the rearward-inclined portion meeting at a forward-protruding feature of said backside inward surface, and wherein the back end of each of said plurality of contacts includes a forward-inclined surface that abuts and opposes said forward-inclined portion of said backside inward surface when the tip end of the respective contact is not thrust to said electrode, and includes a rearward-inclined surface that abuts and opposes said rearward-inclined portion of said backside inward surface when the tip end of said respective contact is not thrust to said electrode, the forward-inclined surface and the rearward-inclined surface forming a concave feature that abuts and opposes said forward-protruding feature of said backside inward surface when the tip end of said respective contact is not thrust to said electrode.