Nitinol foil Application

As a unique advantage and application scenario of "foil"

Thinning and miniaturization:  These are the most important advantages of foil materials. The thickness is usually in the range of micrometers to several hundred micrometers (commonly such as 0.025mm-0.5mm), making it an ideal choice for microelectromechanical systems, microsensors, actuators, and micro medical devices (such as minimally invasive surgical instruments, micro stents, and occluders).

Flexibility and formability: In specific states (such as martensitic or high-temperature austenitic), foil materials are relatively easy to bend and form, making them easy to process into complex planar or three-dimensional structures.

Large area actuation/sensing: Compared to silk, foil can provide a larger working area, suitable for applications that require large area deformation or sensing.

Thermal management:
Thermal switch/thermal interface material: using changes in thermal conductivity or shape during phase transition to control the heat flow path or improve contact thermal resistance.
Over temperature protection device: using shape memory effect to trigger mechanical action (such as disconnecting the circuit) to prevent overheating.

Electronic/Optoelectronic Packaging:
Low stress connection/lead frame: Utilizing superelasticity to absorb stress caused by thermal expansion mismatch, protecting sensitive chips or connection points.
Self aligning/self-assembly structure: Utilizing shape memory effect to achieve micro level precision in self-aligning assembly.

Biomedical applications:
Micro stent: used for ultra-fine blood vessels or cavities in neurovascular, ophthalmic, and other fields.
Occluder/Implant: A thinner and more flexible implant component.
Surgical instrument end effectors: such as bendable and expandable micro forceps, scissors.
Drug delivery system: As a driving element for micro pumps or a controllable release encapsulation film.

Sensing:
Strain sensor: utilizing the characteristic of resistance changing with strain (resistance change originates from phase transition and lattice deformation).
Temperature sensor: utilizing the sudden change characteristic of resistance near the phase transition temperature.