TY - JOUR
T1 - Application and optimization of stiffness abruption structures for pressure sensors with high sensitivity and anti-overload ability
AU - Xu, Tingzhong
AU - Lu, Dejiang
AU - Zhao, Libo
AU - Jiang, Zhuangde
AU - Wang, Hongyan
AU - Guo, Xin
AU - Li, Zhikang
AU - Zhou, Xiangyang
AU - Zhao, Yulong
PY - 2017/9/1
Y1 - 2017/9/1
N2 - The influence of diaphragm bending stiffness distribution on the stress concentration characteristics of a pressure sensing chip had been analyzed and discussed systematically. According to the analysis, a novel peninsula-island-based diaphragm structure was presented and applied to two differenet diaphragm shapes as sensing chips for pressure sensors. By well-designed bending stiffness distribution of the diaphragm, the elastic potential energy induced by diaphragm deformation was concentrated above the gap position, which remarkably increased the sensitivity of the sensing chip. An optimization method and the distribution pattern of the peninsula-island based diaphragm structure were also discussed. Two kinds of sensing chips combined with the peninsula-island structures distributing along the side edge and diagonal directions of rectangular diaphragm were fabricated and analyzed. By bonding the sensing chips with anti-overload glass bases, these two sensing chips were demonstrated by testing to achieve not only high sensitivity, but also good anti-overload ability. The experimental results showed that the proposed structures had the potential to measure ultra-low absolute pressures with high sensitivity and good anti-overload ability in an atmospheric environment.
AB - The influence of diaphragm bending stiffness distribution on the stress concentration characteristics of a pressure sensing chip had been analyzed and discussed systematically. According to the analysis, a novel peninsula-island-based diaphragm structure was presented and applied to two differenet diaphragm shapes as sensing chips for pressure sensors. By well-designed bending stiffness distribution of the diaphragm, the elastic potential energy induced by diaphragm deformation was concentrated above the gap position, which remarkably increased the sensitivity of the sensing chip. An optimization method and the distribution pattern of the peninsula-island based diaphragm structure were also discussed. Two kinds of sensing chips combined with the peninsula-island structures distributing along the side edge and diagonal directions of rectangular diaphragm were fabricated and analyzed. By bonding the sensing chips with anti-overload glass bases, these two sensing chips were demonstrated by testing to achieve not only high sensitivity, but also good anti-overload ability. The experimental results showed that the proposed structures had the potential to measure ultra-low absolute pressures with high sensitivity and good anti-overload ability in an atmospheric environment.
KW - Bending stiffness distribution
KW - High anti-overload ability
KW - High sensitivity
KW - Peninsula-island structured diaphragm
KW - Stress concentration region
UR - https://www.mendeley.com/catalogue/75010a22-f60b-36f0-80d7-c6c247f5df9c/
U2 - 10.3390/s17091965
DO - 10.3390/s17091965
M3 - Article
C2 - 28846599
SN - 1424-8220
VL - 17
JO - Sensors
JF - Sensors
IS - 9
ER -