Patent ID: 11937372
Assignee: YALE UNIVERSITY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method of making a stretchable circuit board assembly, comprising:
depositing a layer of GaIn nanoparticles on a first substrate;
heating the deposited layer of GaIn nanoparticles in an enclosed furnace to a temperature between 800 and 1000° C. for a time duration between 5 minutes and 60 minutes to form a GaIn film comprising a quantity of liquid GaIn and a plurality of solid particles of Ga2O3 suspended in the quantity of liquid GaIn, the Ga2O3 particles having a median particle size between 8 μm and 25 μm wherein the volumetric ratio of solid particles to liquid metal is between 0.4 and 0.7;
cooling the GaIn film in ambient conditions;
transferring at least a portion of the GaIn film to the second stretchable substrate to form at least one GaIn trace;
securing one or more electrical components to the at least one GaIn trace; and
encapsulating the one or more electrical components and the at least one GaIn trace with a stretchable encapsulating layer.