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Stretchable printed electronics for pressure ulcer prevention

The Stretch-Light project is a collaborative effort between the Printed Electronics department at RISE Acreo and the Laboratory of Organic electronic at Linköping University that is aiming for the development of a conformable and elastic PPG measurement patch for the prevention of pressure ulcers that affect 12% to 16% of hospitalized patients.

Example of screen-printed conductors onto stretchable TPU substrate

Aim and goal

The aim of the Stretch-Light project is to develop an elastic and conformable patch for PPG (reflective photoplethysmography) measurement to be used in the prevention of pressure ulcers. The proposed patch will be fabricated by printing of elastic electrical conductors and mounting rigid components (LEDs, photodiodes, ICs for signal processing and transmission) onto a stretchable substrate.


Currently commercially available stretchable inks (both conductive and insulating), designed mainly for textile applications, do not possess adequate stretchatchability.

The robust and reliable integration of rigid components (LEDs, photodiodes, ICs for signal processing and transmission) onto stretchable and conformable materials is still a considerable challenge.

Chemical stability of printed elements is still a challenge when it comes to wearables.


Develop low cost, highly conductive inks for long term stable stretchable conductors.

Develop architectures and processes for pick and place mounting of rigid components onto elastic printed circuits.

Develop encapsulation strategies to improve the stability, both chemical and mechanical, of the wearable sensor.


At its end the Stretch-Light project is expected to provide a variety of benefits at different level:

Improving the quality of life of hospitalised patients by delivering, in possible collaboration with PUsensorAB, a new tool able to presence the incidence of pressure ulcers.

Consolidate the positioning of Sweden in the area of unconventional electronic and wearable

Provide to the scientific community novel technical solutions (inks and processes) for hybrid electronic onto stretchable substrate.

Provide the society with highly trained individual.


Project name




RISE role in project


Project start


5 years

Total budget

2.5 MSek


Soft electronics group at the Laboratory of Organic Electronics of the Linköping University, Linköping University


Stiftelsen för Strategisk Forskning, (SSF-research Institute PhD, FID 16-0068)

Supports the UN sustainability goals

3. Good health and well-being
Valerio Beni

Contact person

Valerio Beni


+46 72 516 86 07

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