A method for interference reduction is described. The system comprises a resource management component, a service level agreement management component and a job scheduling component. A bump may be formed on the barrier layer, and the mask may be removed. The deflecting angle of the lower wing can be greater than the deflecting angle of the upper wing or the length of the lower wing can be greater than the length of the upper wing. Thus, adjustment of a film thickness of a coating film after a coating solution is coated can be effectively performed. The light emitting device package comprises: a body comprising a multilayer cavity; a light emitting device in the cavity; a first phosphor layer sealing the light emitting device and comprising a first phosphor; and a second phosphor layer comprising a second phosphor on the first phosphor layer, the second phosphor and the first phosphor having a difference in the specific gravity.