Patent ID: 11915850
Assignee: APPLIED MATERIALS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A coil assembly, comprising:
a mandrel comprising:
an annular body having a central opening configured to allow the coil assembly to be disposed in semiconductor processing chamber, that includes an internal coolant channel comprising a body coolant inlet through which a coolant fluid flows into the internal coolant channel, which is fluidly coupled to at least one body coolant inlet channel, which is fluidly coupled to at least one body coolant outlet channel, which is fluidly coupled to a body coolant outlet through which the coolant flows out of the internal coolant channel,
wherein the entire coolant channel is disposed completely internal to, and located within the coil assembly mandrel from the body coolant inlet to the body coolant outlet, such that any of the coolant flowing from the body coolant inlet, through the coolant channel, to the body coolant outlet, does not contact an outer surface of the coil assembly mandrel; and a plurality of cooling fins disposed circumferentially about an outer diameter of the annular body, each having a central axis oriented radially outward from the outer diameter of the annular body, each of the cooling fins suitable to support a plurality of coils wrapped around the cooling fin which are oriented orthogonal to the central axis of the cooling fin, wherein at least one of the cooling fins is an active cooling fin, and
wherein the active cooling fin includes the at least one cooling fin channel formed within the active cooling fin, comprising a cooling fin inlet fluidly coupled to a cooling fin outlet through the internal cooling fin channel,
wherein the cooling fin inlet is fluidly coupled to the at least one body coolant inlet channel, and the cooling fin outlet is fluidly coupled to the at least one body coolant outlet channel; an inner electromagnetic cosine-theta (cos θ) coil ring including a first set of inner cos θ coils wrapped around the plurality of cooling fins of the annular body and configured to generate a magnetic field in a first direction; and an outer electromagnetic cosine-theta (cos θ) coil ring including a second set of outer cos θ coils wrapped around the plurality of cooling fins and configured to generate a magnetic field in a second direction orthogonal to the first direction.