Method of fabrication glass diaphragm on silicon macrostructure
First Claim
1. A method for fabricating a glass diaphragm on a silicon macrostructure comprising the steps of:
- (a) obtaining a silicon wafer and forming a cavity in said silicon wafer;
(b) depositing a glass soot into said cavity and filling said cavity, said glass soot also being deposited in a contiguous manner over an external surface of said silicon wafer above said cavity so as to form a glass soot layer having a thickness;
(c) heat-consolidating said glass soot at temperatures between 850 and 1,350°
C. so as to cause said glass soot to shrink and form a glass diaphragm over said cavity.
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Abstract
A method for fabricating microelectromechanical systems containing a glass diaphragm formed on a silicon macrostructure is disclosed. The method comprises the steps of: (a) obtaining a silicon wafer and forming a cavity in the silicon wafer; (b) using a flame hydrolysis deposition technique to deposite glass soot into the cavity, the glass soot fills the cavity and extends onto the external surface of the silicon wafer so as to form a glass soot layer having a predetermined thickness; and (c) heat-consolidating the glass soot at temperatures between 850° and 1,350° C. so as to cause the glass soot to shrink and form a glass diaphragm over the cavity. The shrinkage ratio between the glass diaphragm and the glass soot layer is between 1:20 to 1:50. The silicon wafer can be further fabricated to contain a diaphragm-sealed cavity and/or a diaphragm-converted cantilever.
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14 Claims
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1. A method for fabricating a glass diaphragm on a silicon macrostructure comprising the steps of:
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(a) obtaining a silicon wafer and forming a cavity in said silicon wafer; (b) depositing a glass soot into said cavity and filling said cavity, said glass soot also being deposited in a contiguous manner over an external surface of said silicon wafer above said cavity so as to form a glass soot layer having a thickness; (c) heat-consolidating said glass soot at temperatures between 850 and 1,350°
C. so as to cause said glass soot to shrink and form a glass diaphragm over said cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification