Single crystal, dual wafer, tunneling sensor and a method of making same
First Claim
1. A MEM tunneling sensor assembly comprising:
- (a) a beam structure and a mating structure defined on a first substrate or wafer;
(b) at least one contact structure and a mating structure defined on a second substrate or wafer, the mating structure on the second substrate or wafer being of a complementary shape to the mating structure on the first substrate or wafer; and
(c) a bonding layer is disposed on at least one of said mating structures for bonding the mating structure, defined on the first substrate or wafer to the mating structure on the second substrate or wafer, the mating structures being joined one to another at said bonding layer.
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Abstract
A method of making a micro electromechanical switch or tunneling sensor. A cantilevered beam structure and a mating structure are defined on a first substrate or wafer; and at least one contact structure and a mating structure are defined on a second substrate or wafer, the mating structure on the second substrate or wafer being of a complementary shape to the mating structure on the first substrate or wafer. A bonding layer, preferably a eutectic bonding layer, is provided on at least one of the mating structures. The mating structure of the first substrate is moved into a confronting relationship with the mating structure of the second substrate or wafer. Pressure is applied between the two substrates so as to cause a bond to occur between the two mating structures at the bonding or eutectic layer. Then the first substrate or wafer is removed to free the cantilevered beam structure for movement relative to the second substrate or wafer.
29 Citations
25 Claims
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1. A MEM tunneling sensor assembly comprising:
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(a) a beam structure and a mating structure defined on a first substrate or wafer;
(b) at least one contact structure and a mating structure defined on a second substrate or wafer, the mating structure on the second substrate or wafer being of a complementary shape to the mating structure on the first substrate or wafer; and
(c) a bonding layer is disposed on at least one of said mating structures for bonding the mating structure, defined on the first substrate or wafer to the mating structure on the second substrate or wafer, the mating structures being joined one to another at said bonding layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A MEM tunneling sensor assembly for making a MEM sensor therefrom, the assembly comprising:
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(a) a silicon beam structure and a mating structure defined on a first silicon substrate or wafer;
(b) at least one contact structure and a mating structure defined on a second silicon substrate or wafer, the mating structure on the second substrate or wafer being of a complementary shape to the mating structure on the first substrate or wafer; and
(c) a bonding layer disposed on at least one of said mating structures for bonding the mating structure defined on the first substrate or wafer to the mating structure on the second substrate or wafer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification