Process of bonding plates
First Claim
1. The process of bonding plates in a plate assembly of a quartz crystal resonator including a base plate with a first face with a contact surface;
- a resonator plate with first and second faces with respective first and second contact surfaces, a cover plate with a first face with a contact surface, a first bonding layer disposed between the contact surfaces of the base plate and the resonator plate, and a second bonding layer disposed between the contact surfaces of the resonator plate and the cover plate, comprising;
depositing a layer of chromium on the contact surface of the first face of the base plate;
depositing a layer of silver on the layer of chromium on the contact surface of the first face of the base plate;
depositing a layer of indium on the layer of silver on the layer of chromium on the contact surface of the first face of the base plate;
depositing a layer of chromium on the contact surface of the first face of the resonator plate;
depositing a layer of silver on the layer of chromium on the contact surface of the first face of the resonator plate;
positioning the first face of the base plate towards the first face of the resonator plate so that the indium layer on the base plate is separated by a gap from the silver layer on the resonator plate;
depositing a layer of chromium on the contact surface of the first face of the cover plate;
depositing a layer of silver on the layer of chromium on the contact surface of the first face of the cover plate;
depositing a layer of indium on the layer of silver on the layer of chromium on the contact surface of the first face of the cover plate;
depositing a layer of chromium on the contact surface of the second face of the resonator plate;
depositing a layer of silver on the layer of chromium on the contact surface of the second face of the resonator plate;
positioning the first face of the cover plate towards the second face of the resonator plate so that the indium layer on the cover plate is separated by a gap from the silver layer on the resonator plate to form a plate assembly;
evacuating the plate assembly;
compressing the plate assembly; and
heating the plate assembly to about 310 degrees centigrade for a selective time interval.
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Accused Products
Abstract
A process of bonding crystalline quartz plates in a plate assembly of a quartz crystal resonator is provided. The plate assembly includes a base plate, a resonator plate, a cover plate, a first silver and indium alloy layer between the base plate and the resonator plate, and a second silver and indium alloy layer between the resonator plate and the cover plate. The process of bonding the plates in the plate assembly includes the steps of depositing in sequence on base plate face and on the cover plate face, a layer of chromium, a layer of silver, and a layer if indium, and also includes the steps of depositing in sequence on two opposite faces of the resonator plate, a layer of chromium, and a layer of silver, and also includes the steps in sequence of sandwiching the resonator plate between the base plate and the cover plate to form a plate assembly, then evacuating the plate assembly, compressing the plate assembly, and heating the plate assembly to about 310 degrees centigrade for several hours.
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Citations
7 Claims
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1. The process of bonding plates in a plate assembly of a quartz crystal resonator including a base plate with a first face with a contact surface;
- a resonator plate with first and second faces with respective first and second contact surfaces, a cover plate with a first face with a contact surface, a first bonding layer disposed between the contact surfaces of the base plate and the resonator plate, and a second bonding layer disposed between the contact surfaces of the resonator plate and the cover plate, comprising;
depositing a layer of chromium on the contact surface of the first face of the base plate; depositing a layer of silver on the layer of chromium on the contact surface of the first face of the base plate; depositing a layer of indium on the layer of silver on the layer of chromium on the contact surface of the first face of the base plate; depositing a layer of chromium on the contact surface of the first face of the resonator plate; depositing a layer of silver on the layer of chromium on the contact surface of the first face of the resonator plate; positioning the first face of the base plate towards the first face of the resonator plate so that the indium layer on the base plate is separated by a gap from the silver layer on the resonator plate; depositing a layer of chromium on the contact surface of the first face of the cover plate; depositing a layer of silver on the layer of chromium on the contact surface of the first face of the cover plate; depositing a layer of indium on the layer of silver on the layer of chromium on the contact surface of the first face of the cover plate; depositing a layer of chromium on the contact surface of the second face of the resonator plate; depositing a layer of silver on the layer of chromium on the contact surface of the second face of the resonator plate; positioning the first face of the cover plate towards the second face of the resonator plate so that the indium layer on the cover plate is separated by a gap from the silver layer on the resonator plate to form a plate assembly; evacuating the plate assembly; compressing the plate assembly; and heating the plate assembly to about 310 degrees centigrade for a selective time interval. - View Dependent Claims (2, 3, 4, 5, 6)
- a resonator plate with first and second faces with respective first and second contact surfaces, a cover plate with a first face with a contact surface, a first bonding layer disposed between the contact surfaces of the base plate and the resonator plate, and a second bonding layer disposed between the contact surfaces of the resonator plate and the cover plate, comprising;
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7. The process of bonding plates in a plate assembly of a quartz crystal resonator having a first plate with a face and a second plate with a face and having a chamber therebetween with a chamber surface comprising:
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depositing a layer of chromium on the face of the first plate; depositing a layer of silver on the layer of chromium on the face of the first plate; depositing a layer of indium on the layer of silver on the layer of chromium on the face of the first plate; depositing a layer of chromium on the face of the second plate and simultaneously depositing a layer of chromium of defined length and width on the chamber surface; depositing a layer of silver on the layer of chromium on the face of the second plate and then depositing a layer of gold film on the layer of chromium on the chamber surface; positioning the face of the first plate towards the face of the second plate so that the indium layer on the first plate is separated by a gap from the silver layer on the second plate to form a plate assembly; compressing the plate assembly; and heating the plate assembly to about 310 degrees centigrade for a selective time interval.
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Specification