Conductive emissions protection
View Patent ↗A multi-layer substrate includes a ground structure, a plurality of dielectric layers on the ground structure and a plurality of conductive layers separating the plurality of dielectric layers. The conductive layers include a first conductive layer and a second conductive layer and a connection electrically coupling the first conductive layer and the second conductive layer. The first conductive layer and the ground structure are configured to define a first parasitic capacitance there between and the first conductive layer and the second conductive layer are configured to define a second, negating parasitic capacitance there between.
1. A multi-layer substrate comprising:
a ground structure;
a plurality of dielectric layers on the ground structure; and
a plurality of conductive layers separating the plurality of dielectric layers,
the plurality of conductive layers including a first conductive layer and a second conductive layer and a connection electrically coupling the first conductive layer and the second conductive layer,
the first conductive layer and the ground structure being configured to define a first parasitic capacitance there between and the first conductive layer and the second conductive layer being configured to define a second, negating parasitic capacitance there between.
2. The substrate of claim 1 , wherein at least one of the plurality of dielectric layers is formed using a laser deposition process.
3. The substrate of claim 1 , wherein at least one of the plurality of dielectric layers is formed using an E-beam deposition process.
4. The substrate of claim 1 , wherein at least one of the plurality of dielectric layers are selected from the group consisting of silicon carbide, silicon nitride; silicon dioxide, aluminum nitride, aluminum oxide, alumina, hafnium dioxide, and hafnia.
5. The substrate of claim 1 , wherein at least one of the plurality of conductive layers are formed using the laser deposition process.
6. The substrate of claim 1 , wherein at least one of the plurality of conductive layers are selected from the group consisting of copper, aluminum, nickel, and gold.
7. The substrate of claim 1 , further comprising a die coupled to one of the plurality of conductive layers.
8. The substrate of claim 7 , wherein the die corresponds to a switch.
9. The substrate of claim 1 , wherein one of the plurality of dielectric layers and one of the plurality of conductive layers collectively provide a Faraday shield.
10. The substrate of claim 1 , wherein at least one of the plurality of dielectric layers includes hafnia.
11. A method of manufacturing a multi-layer substrate, the method comprising:
forming a first dielectric layer;
forming a first conductive layer on the first dielectric layer;
forming a second dielectric layer on the first conductive layer such that the second dielectric layer is separated by the first conductive layer from the first dielectric layer, wherein the dielectric layers have a dielectric strength of at least approximately 15,876 volts per mil;
forming a second conductive layer on the second dielectric layer; and
electrically coupling the first conductive layer to the second conductive layer.
12. The method of claim 11 , wherein each of the first dielectric layer and the second dielectric layer have a thickness less than 381 microns.
13. The method of claim 11 , wherein each of the first conductive layer and the second conductive layer are formed using at least one of a laser deposition process or an E-beam deposition process.
14. The method of claim 11 , further comprising: applying an electrical component to the second dielectric layer, wherein the first dielectric layer is formed on a ground structure.
15. The method of claim 14 , wherein the electrical component includes a switch.
16. The method of claim 11 , wherein at least one of the first dielectric layer or the second dielectric layer are selected from the group consisting of silicon carbide, silicon nitride, silicon dioxide, aluminum nitride, aluminum oxide, alumina, hafnium dioxide, and hafnia.
17. The method of claim 11 , wherein at least one of the first conductive layer or the second conductive layer are selected from the group consisting of copper, aluminum, nickel, and gold.
18. A method of controlling parasitic capacitance in a multi-layer substrate, the method comprising:
providing a multi-layer substrate including a ground structure, a plurality of dielectric layers on the ground structure, and a plurality of conductive layers separating the plurality of dielectric layers,
the plurality of conductive layers including a first conductive layer and a second conductive layer,
the first conductive layer and the ground structure defining a first parasitic capacitance there between;
establishing a second parasitic capacitance between the first conductive layer and the second conductive layer; and
negating the effects of the first parasitic capacitance with the second parasitic capacitance with regard to electromagnetic emission to the ground structure.