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A probe needle having a coaxial structure that facilitates assembly of a probe card. The probe needle is manufactured by covering a central conductive body with an insulative tube, and forming a conductive layer around the insulative tube by superimposing a film of fine conductive grains around the

A probe needle having a coaxial structure that facilitates assembly of a probe card. The probe needle is manufactured by covering a central conductive body with an insulative tube, and forming a conductive layer around the insulative tube by superimposing a film of fine conductive grains around the insulative tube.

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What is claimed is: 1. A method for manufacturing a probe needle having a coaxial structure, the method comprising: preparing a central conductive body including a reduced diameter portion having a diameter smaller than that of other portions of the central conductive body; covering the reduced dia

What is claimed is: 1. A method for manufacturing a probe needle having a coaxial structure, the method comprising: preparing a central conductive body including a reduced diameter portion having a diameter smaller than that of other portions of the central conductive body; covering the reduced diameter portion of the central conductive body with an insulative tube; and forming a conductive layer around the insulative tube by superimposing a film of fine conductive grains around the insulative tube. 2. The method of claim 1, wherein the conductive layer has a thickness of about 5-10 μm. 3. A method for manufacturing a probe needle having a coaxial structure, the method comprising: preparing a central conductive body including a reduced diameter portion having a diameter smaller than that of other portions of the central conductive body; covering the reduced diameter portion of the central conductive body with an insulative tube; and forming a conductive layer around the insulative tube by applying a solvent, in which a conductive substance is mixed, around the insulative tube. 4. A method for manufacturing a probe needle having a coaxial structure, the method comprising: preparing a central conductive body including a reduced diameter portion having a diameter smaller than that of other portions of the central conductive body; covering the reduced diameter portion of the central conductive body with an insulative tube; and forming a conductive layer around the insulative tube by performing vapor deposition to superimpose a conductive substance around the insulative tube. 5. The method of claim 4, wherein the conductive layer has a thickness of about 5-10 μm. 6. A method for manufacturing a probe needle having a coaxial structure, the method comprising: covering a central conductive body with an insulative tube, wherein the insulative tube includes a first end portion and a second end portion that are not covered by the insulative tube; and forming a conductive layer around the insulative tube and the second end portion, said forming a conductive layer including immersing the central conductive body in a first solvent containing a conductive substance excluding the first end portion, taking out the central conductive body from the first solvent, drying the central conductive body; and removing a portion of the conductive layer on the second end portion of the insulative tube with a second solvent. 7. The method according to claim 6, wherein the first solvent includes silver grains and a high polymer acrylic resin.