The MEMS thermal actuator is made of polysilicon.
Foil thickness is 1 micron.
Voltage applied: V+ = 5 V
Electrical resistivity: 2.3*10-5 Ohm*m
Thermal conductivity: 150 W/(m*K)
Thermal expansion coefficient: 2.9*10-6 1/K
Young's modulus: 169 GPa, Poisson's ratio: 0.22.
Calculate the electric current and Joule heat losses distribution, temperature and linear mechanical displacement.
To calculate the electric current and Joule losses distribution the DC conduction problem is simulated. Then the results are used in the thermal analysis study to calculate the temperature distribution. Finally, the stress analysis problem is simulated to calculate the related thermal deformation.
Electric potential distribution
Electric current distribution
Joule heat losses distribution
The actuator mechanical displacement is 17 um
* Reference: Marin Hristov Hristov, Tihomir Borisov Takov, Ivelina Nikolaeva Cholakova, Krassimir Hristov Denishev, Vladimir Emilov Grozdanov, Dobromir Georgiev Gaydazhiev, Design and investigation of a thermal actuator, ELECTRONICS 2008, 24-26 September, Sozopol, BULGARIA
DC Conduction simulation
3D to 2D plane convection simulation