Patent ID: 7413774

Claim:
A method of vapor-phase coating deposition on a substrate present in a processing chamber, where at least one precursor used for formation of said coating exhibits a vapor pressure below about 150 Torr at a temperature of 25° C., the method comprising: a) providing a processing chamber in which said coating is vapor deposited; b) providing at least one precursor exhibiting a vapor pressure below about 150 Torr at a temperature of 25° C.; c) transferring vapor of said at least one precursor to a corresponding precursor vapor reservoir in which said precursor vapor accumulates; d) accumulating a precise nominal amount of said at least one precursor vapor required for vapor phase coating deposition in at least one precursor vapor reservoir which corresponds with said at least one precursor, wherein said precise nominal amount of said precursor is accumulated by controlling a pressure at a specific temperature in said precursor vapor reservoir which corresponds with said precursor; and e) adding said precise nominal amount of said at least one precursor vapor to said processing chamber in which said coating is being deposited, wherein the entire said precise nominal amount of said at least one precursor vapor is transferred in batch fashion into said processing chamber.