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US 12,757,321 B2Granted
Biphasic material and stretchable circuit board
AssigneeYale University
InventorsRebecca Kramer-Bottiglio, Shanliangzi Liu, Dylan Shah, Lina Mercedes Sanchez Botero, Stephanie Woodman
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Abstract
Provided are biphasic compositions including a quantity of a conductive liquid and a plurality of a particulate suspended in the quantity of conductive liquid, wherein there is sufficient wetting between the solid particles and the conductive liquid and wherein the resistance of the compositions are less than the resistance for a bulk conductor when strained as defined by Pouillet's law. Also provided are stretchable circuit board assemblies including the biphasic compositions and methods of using the stretchable circuit board assemblies including the biphasic compositions.
Claims20
A stretchable circuit board assembly comprising:
- at least one stretchable substrate layer;
- at least one conductive trace comprising a biphasic composition positioned over at least one surface of the stretchable substrate;
- and
- at least one electrical component electrically connected to the at least one conductive trace and positioned over the at least one surface of the stretchable substrate;
- wherein the biphasic composition comprises a conductive liquid and a particulate suspended in the conductive liquid;
- wherein the particulate has a median particle size between 100 nm and 200 microns;
- wherein the volumetric ratio of particulate to conductive liquid is between 0.02 and 0.70;
- and
- wherein the biphasic composition has a maximum normalized resistance of about 1 to about 15 at 400% strain.
6 more elements
A method of using a stretchable circuit board assembly comprising;
- providing at least one stretchable circuit board assembly comprising:
- at least one stretchable substrate layer;
- at least one conductive trace comprising a biphasic composition positioned over at least one surface of the stretchable substrate;
- at least one electrical component electrically connected to the at least one conductive trace and positioned over the at least one surface of the stretchable substrate;
- at least one stretchable encapsulating layer positioned over the at least one stretchable substrate, the at least one trace, and the at least one electrical component, configured to cover the at least one trace and the at least one electrical component, and
- at least one vertical interconnected access (VIA) connecting at least two traces across at least one stretchable substrate layer, at least one encapsulating layer or a combination thereof, incorporating the at least one stretchable circuit board assembly into a wearable garment for sleep studies, diagnosis of sleep disorders, health tracking, fitness tracking, physical rehabilitation or combinations thereof;
- wherein the biphasic composition comprises a conductive liquid and a particulate suspended in the conductive liquid;
- wherein the particulate has a median particle size between 100 nm and 200 microns;
- wherein the volumetric ratio of particulate to conductive liquid is between 0.02 and 0.70;
- and
- wherein the biphasic composition has a maximum normalized resistance of about 1 to about 15 at 400% strain.
8 more elements
A method of using a stretchable circuit board assembly comprising;
- providing at least one stretchable circuit board assembly comprising:
- at least one stretchable substrate layer;
- at least one conductive trace comprising a biphasic composition positioned over at least one surface of the stretchable substrate;
- at least one electrical component electrically connected to the at least one conductive trace and positioned over the at least one surface of the stretchable substrate;
- at least one stretchable encapsulating layer positioned over the at least one stretchable substrate, the at least one trace, and the at least one electrical component, configured to cover the at least one trace and the at least one electrical component;
- at least one vertical interconnected access (VIA) connecting at least two traces across at least one stretchable substrate layer, at least one encapsulating layer or a combination thereof;
- and
- incorporating the at least one stretchable circuit board assembly into a robotic system comprising one or more robots, robot-robot interfaces, human-robot interfaces, or combinations thereof;
- wherein the biphasic composition comprises a conductive liquid and a particulate suspended in the conductive liquid;
- wherein the particulate has a median particle size between 100 nm and 200 microns;
- wherein the volumetric ratio of particulate to conductive liquid is between 0.02 and 0.70;
- and
- wherein the biphasic composition has a maximum normalized resistance of about 1 to about 15 at 400% strain.
10 more elements
A method of using a stretchable circuit board assembly comprising;
- providing at least one stretchable circuit board assembly comprising:
- at least one stretchable substrate layer;
- at least one conductive trace comprising a biphasic composition positioned over at least one surface of the stretchable substrate;
- at least one electrical component electrically connected to the at least one conductive trace and positioned over the at least one surface of the stretchable substrate;
- at least one stretchable encapsulating layer positioned over the at least one stretchable substrate, the at least one trace, and the at least one electrical component, configured to cover the at least one trace and the at least one electrical component;
- at least one vertical interconnected access (VIA) connecting at least two traces across at least one stretchable substrate layer, at least one encapsulating layer or a combination thereof;
- and
- incorporating the at least one stretchable circuit board assembly into an electronic device selected from the group consisting of a cell phone, a haptic device, a tablet, a display, a virtual reality headset, a handset, a sensor, an array of sensors, a gaming device, and combinations thereof;
- wherein the biphasic composition comprises a conductive liquid and a particulate suspended in the conductive liquid;
- wherein the particulate has a median particle size between 100 nm and 200 microns;
- wherein the volumetric ratio of particulate to conductive liquid is between 0.02 and 0.70;
- and
- wherein the biphasic composition has a maximum normalized resistance of about 1 to about 15 at 400% strain.
10 more elements
Dependencies are inferred from the claim text.