Hermetically sealed electronic packages with electrically powered multi-pin electrical feedthroughs
A hermetically sealed electronic package may include a thermal panel having a panel interior surface and a panel exterior surface with electronic device(s) in thermal communication with the panel interior surface. An enclosure, isolating environmental communication from internal electronic devices and modules, may be coupled to the thermal panel, and the enclosure may have an enclosure interior surface and an enclosure exterior surface. A plurality of electrical feedthroughs may be coupled to the package enclosure for signal and data transmission, and the conducting pin(s) in every electrical feedthrough may be bonded by a hydrophobic sealing material for harsh environmental electrical signal, data and power transmission. The ratio of sealing length over sealing bead diameter in the electrical feedthrough subassembly may have a preferred value from 2 to 3; and the ratio of the sealing bead diameter over pin diameter in the electrical feedthrough subassembly may have a preferred value from 1.5 to 2.0, where a preferred thermal stress resistance could be designed for making highly hermetic sealed electronic package.
1. A hermetically sealed electronic package for electronic devices, the package comprising:
a thermal panel having a panel interior surface and a panel exterior surface, the electronic devices in thermal communication with the thermal panel;
an enclosure coupled to the thermal panel, isolating environmental communication from internal electronic devices and modules; having an enclosure interior surface and an enclosure exterior surface, wherein the enclosure interior surface is coupled to the panel interior surface and the enclosure exterior surface is coupled to the panel exterior surface;
a cavity formed by the panel interior surface and the enclosure interior surface; and
at least one electrical feedthrough coupled to the enclosure, the electrical feedthrough having at least one electrical feedthrough subassembly, wherein the electrical feedthrough subassembly has a conducting pin penetrating from the enclosure interior surface to the enclosure exterior surface, the conducting pin sealed to a header via by a hydrophobic crystalline sealing material.
2. The package of claim 1 , wherein the package is a hermetically sealed electronic package comprising of a plurality of electrical feedthroughs each with electrically powered conducting pins, wherein each electrical feedthrough generates extra heat and leads to temperature rise of the electronic package.
3. The package of claim 2 , wherein the pin and header seal of the electrical feedthrough is configured for greater than 50 KW power delivery, having about 3 to 5° C./MPa thermal resistance for enabling up to 10 amperes current flowing at 5 KV DVC, without causing package temperature rise up to hermeticity failure temperature limit.
4. The package of 2 , wherein the thermal resistance of the pin and header seal is configured for greater than 5 KW power delivery in the electrical feedthrough and has between 7 to 10° C./MPa thermal resistance, and wherein the electrical feedthrough subassembly has a maximum operating temperature from 150° C. to −180° C. for enabling up to 1 ampere current flowing at 5 KV DVC, without causing package temperature rise up to hermeticity failure temperature limit.
5. The package of claim 2 , wherein the electrical feedthrough subassembly comprises a pin diameter to seal bead diameter ratio, and wherein the ratio is less than 2.0.
6. The package of claim 2 , wherein the electrical feedthrough subassembly comprises a sealing length to seal bead diameter ratio, and wherein the ratio is greater than 2.0.
7. The package of claim 6 , wherein the sealing material bead has hydrophobic properties and having a length greater than 1.5 millimeters.
8. The package of claim 1 , wherein the header is coupled to the enclosure by a coupling method selected from laser welding and metal solder/brazing process, and wherein the enclosure comprises a material selected from the group consisting of copper alloy; copper-zinc alloy; and aluminum alloy high-thermal conductive materials.
9. The package of claim 1 , wherein the header is in contact with the thermal panel, and wherein the enclosure comprises a material selected from the group consisting of nickel-cobalt ferrous alloy; titanium alloy; and nickel-iron alloy low-thermal conductive materials.