Patent ID: 8900400

Claim:
Apparatus, comprising: a first block configured with a length extending across an extent of a wafer surface, the block comprising: a main fluid transfer bore configured generally parallel to a head surface across the length; a resistor unit extending substantially across the length, the resistor unit defined as an insert disposed in a path between the main bore and the head surface to impose a resistance on a fluid flowing relative to the head surface between the main bore and the head surface; and a plurality of fluid transfer units, each fluid transfer unit extending in a fluid transfer direction, the plurality of fluid transfer units consisting of a first set of fluid transfer bores open to and between the main bore and the resistor unit and a second set of fluid transfer bores open to and between the resistor unit and the head surface so that the resistor unit substantially conditions the fluid flowing relative to the head surface and between the main bore and the head surface and across the wafer surface, the conditioning providing for substantially even flow out of the second set of fluid transfer bores across the length.