Integrated multi-purpose getter for radio-frequency (RF) circuit modules
View Patent ↗An integrated getter structure and a method for its formation and installation in a circuit module enclosure ( 24 ). The integrated structure includes a hydrogen getter structure ( 10 ) and selected quantities of a material ( 20 ) that is formulated to provide both a particle getter function and an RF absorber function. In one embodiment, the material ( 20 ) is placed in discrete quantities over the hydrogen getter structure ( 10 ). In another embodiment, the hydrogen getter structure ( 10 ) is formed over a sheet of the material ( 20 ) and is provided with apertures ( 30 ) to expose the material ( 20 ).
1. An integrated multi-purpose getter material adapted for use in a radio-frequency (RF) circuit module having an interior surface, the getter material comprising:
a first layer of hydrogen adsorbing material disposed on the interior surface;
a second layer of material covering the first layer where the second layer protects the first layer from oxidation;
a quantity of further material providing both a particle getter function and an RF absorber function, where the quantity of further material is disposed at a plurality of spaced-apart locations on the second layer so that a first portion of the area of the second layer is covered by the quantity of the further material and a second portion of the area of the second layer is not covered by the quantity of the further material;
wherein the quantity of the further material and first and second layers fit inside the enclosure of the RF circuit module.
2. An integrated multi-purpose getter material as defined in claim 1 , and further comprising a hydrogen getter structure comprising the first and second layers.
3. An integrated multi-purpose getter material as defined in claim 2 , wherein the spaced-apart locations of the quantity of the further material comprise a plurality of spaced-apart buttons of the quantity of the further material.
4. An integrated multi-purpose getter material as defined in claim 2 , wherein the spaced-apart locations of the quantity of the further material comprises a plurality of spaced-apart rows of the quantity of the further material.
5. An integrated multi-purpose getter material as defined in claim 1 , wherein the further material comprises a silicone suspension base to provide the particle getter function mixed with a powdered metal-containing material to provide the RF absorber function.
6. An integrated multi-purpose getter material as defined in claim 5 , wherein the powdered metal-containing material is a one of the materials selected from the transition group consisting of iron, cobalt and rhodium in combination, scandium, tantalum, vanadium, and a metal-organo compound in which a metal atom is linked into a carbon chain structure.
7. An integrated multi-purpose getter material as defined in claim 5 , wherein the powdered metal-containing material is a polar helix polymer.
8. An integrated multi-purpose getter material as defined in claim 6 , wherein the powdered metal-containing material is iron.
9. An integrated multi-purpose getter material as defined in claim 8 , wherein the powdered iron has a size approximately in the range 6-10 microns, having been mixed with the silicone suspension such that approximately 60-70 percent, by weight, of the material is iron.
10. An integrated multi-purpose getter material as defined in claim 2 , wherein the further material comprises a silicone suspension base to provide the particle getter function mixed with a powdered metal-containing material to provide the RF absorber function.
11. An integrated multi-purpose getter material as defined in claim 10 , wherein the powdered metal-containing material is a one of the materials selected from the group consisting of iron, cobalt and rhodium in combination, scandium, tantalum, vanadium, and a metal-organo compound in which a metal atom is linked into a carbon chain structure.
12. An integrated multi-purpose getter material as defined in claim 11 , wherein the powdered metal-containing material is iron.
13. An integrated multi-purpose getter material as defined in claim 12 , wherein the powdered iron has a size approximately in the range 6-10 microns, having been mixed with the silicone suspension such that approximately 60-70 percent, by weight, of the material is iron.
14. An integrated multi-purpose getter material as defined in claim 2 , wherein the first layer is a hydrogen-absorbing metal layer and the second layer is a protective over-layer allowing one-way passage of hydrogen to the metal layer and protecting the metal layer from oxidation.
15. An integrated multi-purpose getter material as defined in claim 14 , wherein the hydrogen-absorbing layer comprises titanium; and the protective over-layer comprises palladium.
16. An integrated multi-purpose getter material as defined in claim 15 and further comprising a metal contact layer on which the titanium metal layer is formed.