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Developing MEMS sensors with a high strain sensing range (up to 0.6) and a stepwise sensing mechanism could enable widespread downstream applications, by allowing intimate, mechanically conformable integration with soft biological tissues. Most approaches to date focus on challenges to associate the sensing mechanism with high peak strains under large deformation. By designing and characterizing test...
This paper reports on the sensing of large strain using a mechanically actuated switch gate and a variable resistor surface creasing test structure. Test structures with different gate and interconnect/wiring geometries have been designed, fabricated and characterised. They respond to designed strain values with a reduction in device resistivity of 11 to 12 orders of magnitude. Results from strain...
Diabetic macular edema (DME) is a common vision threatening complication of diabetic retinopathy which can be assessed by detecting exudates (a type of bright lesion) in fundus images. In this work, two new methods for the detection of exudates are presented which do not use a supervised learning step; therefore, they do not require labelled lesion training sets which are time consuming to create,...
High performance polarization splitter, which is based on the hybrid coupler with long range surface plasmon polariton and dielectric waveguide, has been realized. Pure TM mode and high extinction ratio TE mode is obtained.
In order to evaluate the importance of stress relaxation on device performance of capacitive RF MEMS switches, stress relaxation has been measured in 1.2-mum-thick Au films using a membrane bulge technique. When the residual stress in the films is small, the stress relaxation is fully recoverable and is well described by linear anelasticity (viscoelasticity) theory. A 27% reduction in the effective...
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