fig15

Figure 15. (A) PI-based rigid island array assembled on a TPU substrate for a stretchable TFT. Reproduced with permission^[122]. Copyright 2021, American Chemical Society; (B) Stretchable inorganic transistor with a PEA elastomer of relatively higher modulus embedded as a rigid island array within a PUA substrate, exhibiting excellent adhesion at the PUA-PEA interface. Reproduced with permission^[123]. Copyright 2024, Springer Nature; (C) MLPF with varying moduli introduced as rigid islands on a stretchable substrate, enabling a stretchable inorganic TFT. Reproduced with permission^[125]. Copyright 2022, Elsevier; (D) Stretchable substrate with an array region designed with a modulus gradient along the thickness direction to optimize stress distribution during tensile deformation. Reproduced with permission^[126]. Copyright 2024, Wiley-VCH. PI: Polyimide; TPU: thermoplastic polyurethane; TFT: thin-film transistor; PEA: polyepoxy acrylate; PUA: polyurethane acrylate; MLPF: multilayer polymer film.