Patent ID: 7148714

Claim:
A probe card comprising: (a) a first conductive surface on said probe card; (b) a second conductive surface on said probe card substantially surrounding said first conductive surface; (c) a third conductive surface on said probe card; (d) a fourth conductive surface on said probe card substantially surrounding said third conductive surface; (e) said first, second, third, and fourth conductive surfaces are electrically insulated from one another; (f) a first probing element supported by said probe card; (g) a second probing element supported by said probe card; (h) said first conductive surface electrically interconnected to said first probing element; (i) said third conductive surface electrically interconnected to said second probing element; (j) a first groove substantially surrounding said first conductive surface and not surrounding said third conductive surface; (k) a second groove substantially surrounding said third conductive surface and not surrounding said first conductive surface.