Patent ID: 11948813
Assignee: ASM IP HOLDING B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 21:
22. A semiconductor processing apparatus, comprising:
a reaction chamber;
a reaction chamber exhaust port;
a showerhead device comprising:
an internal plenum communicating with a pump, the internal plenum comprising a labyrinth pattern;
a plurality of exhaust apertures in fluid communication with the internal plenum and the reaction chamber;
a plurality of inlet apertures in fluid communication with a reaction vapor source and the reaction chamber, the inlet apertures extending through the showerhead device and bypassing the internal plenum; and
a plurality of pumps in fluid communication with the plurality of exhaust apertures,

wherein the ratio of the pumping speed of gases through the plurality of exhaust apertures to the pumping speed of gases through the reaction chamber exhaust port in the reaction chamber is in a range of 100:1 to 1:100.