Patent ID: 7662254

Claim:
Apparatus for orienting an upper electrode relative to a desired existing orientation of a lower electrode in a wafer process chamber, each electrode being configured with a reference surface, the apparatus comprising: a fixture configured with an upper nest and a lower nest, the upper nest being configured with an upper fixture reference surface and an upper wall, the lower nest being configured with a lower fixture reference surface and a lower wall, the lower fixture reference surface being parallel to the upper fixture reference surface, the upper wall being coaxial with and parallel to the lower wall, each of the upper nest and lower nest being configured to receive at least a portion of the respective upper and lower electrode reference surface, the nests orienting the upper electrode relative to the desired existing orientation of the lower electrode by aligning the lower fixture reference surface and the upper fixture reference surface parallel to the lower electrode reference surface and by centering the upper electrode relative to the lower electrode.