Alkali Metal Deposition System
First Claim
1. A deposition system for alkali and alkaline earth metals comprising:
- a vacuum chamber;
a metal sputter target within said vacuum chamber, said target comprising target material attached to a backing plate including cooling channels;
a substrate holder within said vacuum chamber, said holder being configured to hold a substrate facing and parallel to said metal sputter target; and
multiple power sources configured to apply energy to a plasma ignited between said substrate and said target material, said multiple power sources including a first power source for controlling target material self bias, and a second power source for controlling ion density in said plasma;
wherein said target material is an alkali metal or alkaline earth metal.
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Accused Products
Abstract
A deposition system for alkali and alkaline earth metals may include a metal sputter target including cooling channels, a substrate holder configured to hold a substrate facing and parallel to the metal sputter target, and multiple power sources configured to apply energy to a plasma ignited between the substrate and the metal sputter target. The target may have a cover configured to fit over the target material, the cover may include a handle for automated removal and replacement of the cover within the deposition system, and a valve for providing access to the volume between the target material and the cover for pumping, purging or pressurizing the gas within the volume. Sputter gas may include noble gas with an atomic weight less than that of the metal target.
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Citations
21 Claims
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1. A deposition system for alkali and alkaline earth metals comprising:
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a vacuum chamber; a metal sputter target within said vacuum chamber, said target comprising target material attached to a backing plate including cooling channels; a substrate holder within said vacuum chamber, said holder being configured to hold a substrate facing and parallel to said metal sputter target; and multiple power sources configured to apply energy to a plasma ignited between said substrate and said target material, said multiple power sources including a first power source for controlling target material self bias, and a second power source for controlling ion density in said plasma; wherein said target material is an alkali metal or alkaline earth metal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of sputter depositing alkali and alkaline earth metals on a substrate comprising:
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igniting a plasma between said substrate and a sputter target within a vacuum chamber, wherein said plasma includes noble gas species and said sputter target comprises target material attached to a backing plate including cooling channels; adding energy to said plasma by multiple power sources, wherein said multiple power sources include a first power source for controlling target material self bias, and a second power source for controlling ion density in said plasma; sputtering target material from said sputter target and depositing the sputtered target material on said substrate, wherein said sputtering is by noble gas species from said plasma and wherein said noble gas species include ions with an atomic weight less than the atomic weight of said target material; and during said sputtering, cooling said sputter target by pumping coolant through said cooling channels in said backing plate; wherein said target material is an alkali metal or alkaline earth metal. - View Dependent Claims (20, 21)
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Specification