Patent ID: 11867752
Assignee: JOHNSTECH INTERNATIONAL CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A Kelvin testing system for testing integrated circuit devices, comprising:
a device under test;
a load board; and
a contact assembly including:
at least one grouping of blades including a first force blade, a second force blade, a first sense blade, and a second sense blade; the first force blade, the second force blade, the first sense blade, and the second sense blade being disposed in a side by side generally parallel relationship; the first force blade, the second force blade, the first sense blade, and the second sense blade being configured to be longitudinally slidable with respect to each other; the first force blade and the second force blade being staggered in a longitudinal direction and disposed side by side; the first sense blade and the second sense blade being staggered in the longitudinal direction and disposed side by side;
an electrical insulation layer disposed between the first force blade and the first sense blade and between the second force blade and the second sense blade; and
an elongated elastomer, the elastomer being configured to be retained by the first force blade, the second force blade, the first sense blade, and the second sense blade;
wherein each of the first force blade, the second force blade, the first sense blade, and the second sense blade includes a recess having an opening and sized to receive and retain at least a portion of the elastomer;
wherein the first force blade, the second force blade, the first sense blade, and the second sense blade are electrically conductive; the insulation layer and the elastomer are non-conductive,

wherein the testing system further comprises a housing,
the contact assembly is disposed inside the housing,
the elastomer is wedged into the housing to retain the contact assembly in the housing,
the housing includes at least one elastomer slot at the bottom of the housing, the elastomer slot has an arched door-shape, a key-hole shape, a rectangular shape, or a T-shape in a cross-sectional view.