Patent ID: 11959819
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A strain sensor comprising:
a flexible substrate;
an upper capping layer on the flexible substrate;
rigid patterns on the flexible substrate, the rigid patterns comprising a first pattern and a second pattern spaced apart from the first pattern in a first direction;
a first electrode on the first pattern;
a second electrode on the second pattern, the second electrode being spaced apart from the first electrode; and
a piezoresistive layer connecting the first electrode and the second electrode, wherein
each of the rigid patterns has a stiffness greater than that of the flexible substrate,
the first pattern has a first thickness in a second direction perpendicular to the first direction,
the piezoresistive layer has a second thickness in the second direction,
the first thickness is greater than the second thickness,
the rigid patterns have side surfs that face each other,
the piezoresistive layer vertically overlaps the side surfaces of rigid patterns that face each other,
the upper capping layer contacts with a side the piezoresistive layer, side surfaces of the first and second electrodes, and at least part of upper surfaces of the first and second electrodes, and
a width of the first pattern in the first direction is the same as a width of the first electrode in the first direction.