Auxetic stretchable substrate with flexible joint structure and method of manufacturing same

An auxetic stretchable substrate with a flexible joint structure, comprising:

• a substrate made of an elastic material;
• an auxetic formed on the substrate and including a plurality of first regions;
• and
• flexible joints formed in each of the plurality of first regions,
• wherein each of the plurality of first regions is a region in which a material constituting the auxetic is not printed, and at least some of the flexible joints formed in each of the plurality of first regions have different Young's moduli.

A flexible electronic device comprising:

• a stretchable substrate;
• and
• a flexible electrode formed on the stretchable substrate,
• wherein the stretchable substrate includes:
• a substrate made of an elastic material;
• an auxetic formed on the substrate and including a plurality of first regions;
• and
• flexible joints formed in each of the plurality of first regions, and
• each of the plurality of first regions is a region in which a material constituting the auxetic is not printed, and at least some of the flexible joints formed in each of the plurality of first regions have different Young's moduli.