Patent ID: 6776879
Filing Date: 2004-08-17
Classification: C23C,H01J

Abstract:
A backing plate which is used for a sputtering apparatus for forming a thin film on a substrate, and to which a substantially rectangularly-shaped target is bonded, the backing plate comprising:cooling means for feeding a cooling medium to the backing plate at a predetermined flow rate, the cooling means including at least one cooling medium flow passage, and wherein there is substantially uniform temperature distribution in the target by virtue of: (a) controlling the flow rate of the cooling medium; (b) feeding the cooling medium to at least one corner of the backing plate and to at least a portion of the periphery of the backing plate such that a different level of cooling is achieved at the at least one corner than at the at least a portion of the periphery; and (c) applying different sputtering powers to predetermined portions of the target, and wherein the substantially uniform temperature distribution in the target results in formation of a thin film having a substantially uniform film thickness.