Fabrication of advanced silicon-based MEMS devices
First Claim
1. A method fabricating a micro-electro-mechanical (MEM) device and an electronic device on a common substrate comprising the steps of:
- fabricating said electronic device comprising a plurality of electronic components on said common substrate;
depositing a thermally stable interconnect layer on said electronic device;
encapsulating the interconnected electronic device with a protective layer;
forming a sacrificial layer over said protective layer;
opening holes in the sacrificial layer and said protective layer to allow the connection of the MEM device to said electronic device;
fabricating said MEM device by depositing and patterning at least one layer of amorphous silicon; and
removing at least a portion of said sacrificial layer.
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Accused Products
Abstract
A micro-electro-mechanical (MEM) device and an electronic device are fabricated on a common substrate by fabricating the electronic device comprising a plurality of electronic components on the common substrate, depositing a thermally stable interconnect layer on the electronic device, encapsulating the interconnected electronic device with a protective layer, forming a sacrificial layer over the protective layer, opening holes in the sacrificial layer and the protective layer to allow the connection of the MEM device to the electronic device, fabricating the MEM device by depositing and patterning at least one layer of amorphous silicon, and removing at least a portion of the sacrificial layer. In this way, the MEM device can be fabricated after the electronic device on the same substrate.
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Citations
33 Claims
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1. A method fabricating a micro-electro-mechanical (MEM) device and an electronic device on a common substrate comprising the steps of:
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fabricating said electronic device comprising a plurality of electronic components on said common substrate;
depositing a thermally stable interconnect layer on said electronic device;
encapsulating the interconnected electronic device with a protective layer;
forming a sacrificial layer over said protective layer;
opening holes in the sacrificial layer and said protective layer to allow the connection of the MEM device to said electronic device;
fabricating said MEM device by depositing and patterning at least one layer of amorphous silicon; and
removing at least a portion of said sacrificial layer. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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6. The method of claim 6, wherein said titanium-based under-layer is selected from the group consisting of:
- titanium, Ti, titanium nitride, TiN or combinations of Ti and TiN;
said an aluminum-based middle-layer is selected from the group consisting of;
aluminum, Al;
an aluminum-silicon binary alloy containing less then 2.0 wt % of silicon, as to ensure a silicon-eutectic temperature of more than 567°
C.;
an aluminum-copper binary alloy containing less than 6.0 wt % of copper, as to ensure a silicon-eutectic temperature of more than 548°
C.;
a binary aluminum alloy having an eutectic temperature higher than 545°
C.;
an aluminum-silicon-copper ternary alloy containing less than 2.0 wt % of silicon and less than 6.0 wt % of copper;
a ternary aluminum alloy having an eutectic temperature higher than 545°
C.; and
said titanium based over-layer is selected from the group consisting of;
titanium, Ti, titanium nitride, TiN or combinations of Ti and TiN.
- titanium, Ti, titanium nitride, TiN or combinations of Ti and TiN;
Specification