Patent ID: 6930498

Claim:
A membrane probing assembly comprising: (a) a probe card having an upper surface and supporting an elongate probe card signal conductor having an end and a substantial length located between a pair of spaced apart guard conductors, said guard conductors and said signal conductor being arranged in a plane substantially parallel to said upper surface of said probe card; (b) a membrane assembly including a membrane having a lower surface and supporting an elongate membrane a signal conductor having an end and a substantial length located between a pair of spaced apart guard conductors, said guard conductors and said signal conductor being arranged in a plane substantially parallel to said lower surface of said membrane; (c) a conductive structure interconnecting said probe card signal conductor and said membrane signal conductor, said conductive structure located proximate said ends of said elongate signal conductors; (d) said guard conductors of said probe card being electrically interconnected proximate the interconnection between said probe card signal conductor and said membrane signal conductor by a substantially coplanar conductor; and (e) said guard conductors of said membrane assembly being electrically interconnected proximate the interconnection between said probe card signal conductor and said membrane signal conductor by a substantially coplanar conductor.