目的 探究多孔聚二甲基硅氧烷(PDMS)基底复合柔性互连导线的透气性能和延展性能，以使其更好地应用在医疗领域。方法 本文采用三维数字图像相关(3D-DIC)方法检测了25 ℃下不同孔隙率的多孔PDMS基底复合柔性互连导线单轴拉伸过程中导线与基底的面内应变失配和离面位移特征。在此基础上，本文引入平均位移(wm)和位移幅(wa)作为量化表征复合柔性电子离面变形的指标，并结合多孔PDMS基底的气密性实验结果评价了不同导线样品。结果 研究结果表明，多孔PDMS材料作为基底能显著降低复合柔性电子的离面变形程度，并使复合柔性电子具有良好的透气性。在相同拉伸载荷(20 N)和拉伸距离下，PDMS与去离子水质量比为6∶1时的多孔PDMS基底复合柔性互联导线具有稳定的离面变形变化量。结论 多孔PDMS基底复合柔性电子不仅具有良好的透气性，而且可以有效地增强金属互联层与柔性基底的粘连程度。本文所获得的PDMS与去离子水最佳掺杂质量比，可为制造高延展性多孔基底柔性电子器件提供参考。

The work aims to explorethe air permeability and ductility of composite flexible interconnecting wires with porous polydimethyl siloxane (PDMS) substrates, so as to apply them in the medical field better. Three-dimensional digital image correlation (3D-DIC) method was used to detect the surface strain mismatch and out-of-plane displacement characteristics of the wires and the substrates during the uniaxial tensile process of composite flexible interconnecting wires with porous PDMS substrates of different porosity at 25 ℃. On this basis, the mean displacement (wm) and displacement amplitude (wa) were introduced as evaluation indicators to quantitatively characterize the out-of-plane deformation of composite flexible electrons. In addition, the evaluation indicators and the air permeability test results of the porous PDMS substrates were combined to evaluate the different wire samples. The results of this study indicated that the porous PDMS substrates could significantly reduce the out-of-plane deformation of the composite flexible electrons and make the composite flexible electrons have good air permeability. When the mass ratio of PDMS to deionized water was 6:1, the composite flexible interconnecting wires with porous PDMS substrates had stable out-of-plane deformation under the same tensile load (20 N) and the same tensile distance. The composite flexible electrons with porous PDMS substrates not only have good air permeability, but also can effectively enhance the degree of adhesion between the metal interconnect layer and the flexible substrate. The optimal doping mass ratio between PDMS and deionized water obtained can provide a reference for manufacturing high ductility flexible electronic devices with porous substrates.