Polydimethylsiloxane (PDMS) is widely used in the field of flexible electronics due to its transparency

biocompatibility

good elasticity and so on. Aiming at the wire layout of flexible electronic devices

a new flexible structure of PDMS with spring wire is designed. Through the combination of experiment and finite element simulation

under the condition of constant spring parameters such as spring outer diameter

D

the optimum process parameters of tensile properties of flexible structure were studied from three aspects: the ratio of PDMS prepolymer to curing agent

the thickness of flexible structure and the spring spacing. The results show that the optimum process parameters are as follows: the mass ratio of PDMS prepolymer to curing agent is 15∶1

the structure thickness is 2.14

D

and the spring spacing is 1.57

D

. The tensile strain of flexible structure can reach 95%

and the tensile force tends to be stable under the same tensile deformation after 20 cycles. In the flexible structure

the spring-shaped wire still has excellent conductivity stability even though it has large deformation during stretching.