Method of fabricating stretchable electronic device, stretchable electronic device, and stretchable display apparatus

A method of fabricating a stretchable electronic device, comprising:

• forming an elastomer polymer layer on a base substrate;
• forming a plurality of recesses partially extending into the elastomer polymer layer;
• subsequent to forming the plurality of recesses, selectively stiffening the elastomer polymer layer in a plurality of defined regions of the elastomer polymer layer corresponding to the plurality of recesses, thereby forming a modified elastomer polymer layer comprising a plurality of stiffened portions respectively in a plurality of stiffened regions spaced apart by one or more elastomeric portions in one or more elastomeric regions, the plurality of stiffened portions having a Young's modulus greater than a Young's modulus of the one or more elastomeric portions;
• separating the modified elastomer polymer layer from the base substrate;
• and stretching the modified elastomer polymer layer to form a stretched modified elastomer polymer layer;
• transferring the stretched modified elastomer polymer layer to an intermediate base substrate, and subsequent to stretching the modified elastomer polymer layer and transferring the stretched modified elastomer polymer layer to the intermediate base substrate, forming a plurality of electronic devices on the stretched modified elastomer polymer layer respectively in the plurality of stiffened regions, each of the plurality of electronic devices formed on a side of one of the plurality of stiffened portions distal to the base substrate.