| CPC C23C 14/243 (2013.01) [C23C 14/30 (2013.01)] | 25 Claims |

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1. A crucible cover comprising:
a body member configured to interface with a crucible comprising a multiple-pocket vapor source comprising a plurality of pockets, the body member having an opening formed therein; and
an insert member at least partially disposed within the opening and movably interfaced with the body member thereat;
wherein the crucible cover is configured such that, in operation of the crucible cover to cover the multiple-pocket vapor source, the insert member is displaceable relative to the body member such that at least a portion of the insert member remains in physical contact with the crucible but is taken out of physical contact with the body member.
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