Patent ID: 11970772
Assignee: LAM RESEARCH CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A method for controlling precursor delivery in a semiconductor processing tool, the method comprising:
(a) starting a flow of a precursor from a precursor source to a process chamber before a dose step by an amount of time that is substantially equal to a line charge time, wherein the line charge time is the time required for precursor to flow from the precursor source to the process chamber;
(b) stopping the precursor from flowing out of the precursor source;
(c) opening a process chamber valve, at the beginning of the dose step, to allow the flow of precursor to enter the process chamber; and
(d) closing the process chamber valve, at the end of the dose step, to stop the flow of precursor from entering the process chamber,
wherein, prior to (a), a gas flows through a gas line without the presence of the precursor, and wherein, during (a), the gas flows to cause the precursor to move through the gas line to the processing chamber.