Patent ID: 8340827

Claim:
A method for ascertaining a mass flow controller (MFC) control scheme for a recipe, said MFC control scheme being configured for reducing a time scale for gas delivery into a processing chamber of a plasma processing system, comprising: identifying a set of delayed gas species utilized during execution of said recipe with a set of delivery time slower than a target delivery time scale; establishing an initial overshoot strength for each gas specie of said set of delayed gas species, wherein said initial overshoot strength being a factor by which an MFC flow rate is increased; determining an initial overshoot duration for said each gas specie of said set of delayed as species, said initial overshoot duration being a time duration for applying said initial overshoot strength to said MFC flow rate; establishing said MFC control scheme by executing said recipe by adjusting an MFC hardware for said each gas specie of said set of delayed gas species, wherein said adjusting said MFC hardware includes applying said initial overshoot strength for said initial overshoot duration to determine if said MFC control scheme provides for said each gas specie of said set of delayed gas species a pressure profile within a target accuracy of an equilibrium pressure for said processing chamber; and adjusting said initial overshoot strength if said pressure profile for said each has specie of said set of delayed gas species is not within said target accuracy of said equilibrium pressure for said processing chamber, wherein said initial overshoot duration for said each gas specie of said set of delayed gas species is modified if an adjusted MFC flow rate is greater than a pre-determined percentage of a maximum MFC flow rate for said MFC hardware wherein said adjusted MFC flow rate is said MFC flow rate modified by said initial overshoot strength for said initial overshoot duration.