3D piezoresistive silicon microprobes with stacked suspensions for tailored mechanical anisotropies
3D piezoresistive silicon microprobes with stacked suspensions for tailored mechanical anisotropies
复制标题
具有堆叠式悬架的 3D 压阻硅微探针,可实现定制的机械各向异性
DOI:
10.1016/j.sna.2017.09.039
复制
发表时间:
2017
影响因子:
4.6
通讯作者:
D. Metz
中科院分区:
文献类型:
--
作者:
D. Metz
Different kinds of piezoresistive microprobes based on silicon have been developed to enable measurement with high accuracies. However, the typical mechanical anisotropy of such systems leads to the slip of the tip, when probing inclined surfaces. Here, a novel microprobe design is presented, which can be tailored to provide a range of anisotropy or even a perfect isotropy. In the first approach, the microprobe is composed of two stacked silicon membranes. In the second approach, a stainless steel suspension in the form of a laser structured foil is stacked on a silicon membrane. Geometrical parameter studies were carried out by mechanical FEM simulations to determine their influence on the stiffnesses in all spatial directions and to predict anisotropies. Microsystems with selected geometries were fabricated and stacking was obtained through selective adhesive transfer and bonding on a wafer level. Prototypes with anisotropies between 3 and 0.4 were characterized confirming the simulations.
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DOI:
10.1016/j.precisioneng.2015.08.004
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2016
影响因子:
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通讯作者:
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