Table 1 Contrast of common flexible substrates
Flexible substrates | Thermal conductivity | CTE | Young's modulus | Glass transition temperature | Resistivity | Relative permittivity |
|---|---|---|---|---|---|---|
PDMS | \(0.15{ }\,{\text{W}}\,{\text{m}}^{ - 1} \,{\text{K}}^{ - 1}\) | \(301\,{\text{ppm}}\,^{ \circ } {\text{C}}^{ - 1}\) | \(\approx \,3.7\,{\text{MPa}}\) | 125 \(^{ \circ } {\text{C}}\) | \({1}{\text{.2}} \times {10}^{{14 }} \,\Omega \,{\text{cm}}^{ - 1}\) | 2.3–2.8 |
PI | \(0.1\,{\text{W}}\,{\text{m}}^{ - 1} \,{\text{K}}^{ - 1}\) | \(16{ }\,{\text{ppm}}\,^{ \circ } {\text{C}}^{ - 1}\) | \(\approx \,2.8 \,{\text{GPa}}\) | 360–410 \(^{ \circ } {\text{C}}\) | \({1}{\text{.5}} \times {10}^{{{17}}} \, \Omega \,{\text{cm}}^{ - 1}\) | 3.0–3.6 |