DING Yong, LIU Ze-wen, LIU Li-tian, et al. Design and Fabrication of Silicon Micromachining Suspended Inductor[J]. Acta Electronica Sinica, 2002, 30(11): 1597-1600.
DING Yong, LIU Ze-wen, LIU Li-tian, et al. Design and Fabrication of Silicon Micromachining Suspended Inductor[J]. Acta Electronica Sinica, 2002, 30(11): 1597-1600.DOI:
The factors which determine the quality (Q) factor of planar spiral inductor are presented in this paper
and a technology to fabricate suspended MEMS devices for RF circuits is presented.A simplified electrical model is used to study the influence of high-frequency magnetic fields on the parasitical resistance
including the eddy effect and skin effect.To get high-Q suspended inductor
porous silicon (PS) is used as sacrificial layer
and SiO
2
film is used as a support membrane.During the process
TMAH solution with Si powder and (NH
4
)
2
S
2
O
8
is used to remove the PS layer through small etching holes with no influence on the uncovered Al in the devices.A suspended inductor structure is realized using this technology. The fabrication is proved to be reliable.