Patent ID: 11933818
Assignee: SK HYNIX INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A probe test card comprising:
a first substrate;
a second substrate attached to the first substrate, the second substrate having a first surface and a second surface being opposite to the first surface, the second surface including a plurality of trenches;
a plurality of test needles arranged in each of the plurality of trenches, each test needle including a first end and a second end; and
a fixing layer filled in each trench to non-removably fasten the first ends of the test needles in each trench, respectively,
wherein the second ends of the test needles protrude from the fixing layer of the trench to contact probe pads of a device under test (DUT), and
wherein the fixing layer includes a material that having a lower coefficient of thermal expansion than the second substrate, and
wherein an upper surface of the fixing layer is coplanar with the second surface of the second substrate.