Main objective
The objective of this project is the development of stretchable electronics for large area application for use in health care, wellness and functional clothes, and for integrated electronics in stretchable parts and products. Stretchable electronics includes the integration of electronic components, energy supply, sensors, actuators or display and switches on a stretchable substrate with stretchable conductors.
TPU test substrate with Cu conductors and dummy 8-pin component mounted
| Technology Objectives |
| Stretchable material thickness |
0.05 to 2mm |
| Stretchability |
1 - 50 %, at low stress levels, pure (an-)elastic deformation |
| Biocompatibility |
Skin contact, wound contact, depending on application |
| Number of interconnecting layers in a multilayer |
1 – 4 |
| Conductor line / spacing |
125 µm / 125 µm for coarse technology
10 µm / 10 µm for small area fine pitch technology |
| Conductivity of conductors |
< 50 Ω/sq., for polymer based conductors |
| Component assembly pitch |
0.5 mm |
| Electronic Component types |
Bare die, SOT, QFP, flip-chip, BGA, SMD passives… |
| Max. number of I/Os per component |
100 |
| Max. size of single components |
5 x 5 mm |
| Component assembly |
Lead free soldering, adhesive as alternative, mechanical “clamping” |
| Power source |
Thin film solid state Lithium-ion battery, enduring high assembly temperatures (up to 250°C) |
| Capacity : 100 µAh/cm² |
| Current density available : 2 mA/cm² |
| Manufacturing |
Potential for low cost large scale manufacturing |
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