Method of forming a sensor for detecting motion
First Claim
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1. A method of forming a MEMS device, the method comprising:
- providing a silicon-on-insulator substrate comprising a device layer, an insulator layer, and a handle layer;
patterning the device layer to form a device structure in the device layer;
providing a support substrate;
patterning the support substrate;
forming an electrically conductive layer over the support substrate;
bonding together the silicon-on-insulator substrate and the support substrate;
removing the handle layer from the silicon-on-insulator substrate; and
removing the insulator layer from the silicon-on-insulator substrate.
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Abstract
A method of forming a sensor for detecting motion is disclosed. The method includes a first step (110) of providing a silicon-on-insulator (SOI) substrate (200) containing a device layer (210), an insulator layer (220), and a handle layer (230). The device layer may be patterned to form a device structure (310). A support substrate (410) is also provided and patterned, and an electrically conductive layer (510) is formed over the support substrate. The SOI substrate and the support substrate are bonded together, and the handle layer and the insulator layer are removed from the SOI substrate, thus releasing the device structure.
52 Citations
22 Claims
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1. A method of forming a MEMS device, the method comprising:
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providing a silicon-on-insulator substrate comprising a device layer, an insulator layer, and a handle layer;
patterning the device layer to form a device structure in the device layer;
providing a support substrate;
patterning the support substrate;
forming an electrically conductive layer over the support substrate;
bonding together the silicon-on-insulator substrate and the support substrate;
removing the handle layer from the silicon-on-insulator substrate; and
removing the insulator layer from the silicon-on-insulator substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of manufacturing a MEMS device, the method comprising:
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providing a silicon-on-insulator substrate comprising a device layer, an insulator layer, and a handle layer;
patterning the device layer to form a seismic mass in the device layer;
providing a support substrate;
patterning the support substrate;
forming an electrically conductive layer over the support substrate;
bonding together the silicon-on-insulator substrate and the support substrate;
removing the handle layer from the silicon-on-insulator substrate; and
removing the insulator layer from the silicon-on-insulator substrate. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of manufacturing a sensor for detecting motion, the method comprising:
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providing a silicon-on-insulator substrate comprising a device layer and a handle layer separated from each other by an insulator layer;
etching a first pattern into the device layer to form a cantilever structure in the device layer;
providing a support substrate having a surface;
etching a second pattern into the surface of the support substrate;
forming an electrically conductive layer over the surface of the support substrate after etching the second pattern;
bonding together the device layer of the silicon-on-insulator substrate and the surface of the support substrate after etching the first pattern and after forming the electrically conductive layer;
etching the handle layer from the silicon-on-insulator substrate after bonding together the device layer of the silicon-on-insulator substrate and the surface of the support substrate; and
etching the insulator layer from the silicon-on-insulator substrate after removing the handle layer to release the cantilever structure. - View Dependent Claims (19, 20, 21, 22)
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Specification