Systems and methods for metering a dose volume of fluid used to treat microelectronic substrates
View Patent ↗The disclosure relates to systems and methods for metering a dose volume of fluid that may be used to treat microelectronic substrates. The system enables precision dispensing of relatively small amounts of a liquid chemical into a chemical bath or processing chamber for microelectronic substrates. The dispensing device may include a fluid conduit with a plurality of actuation devices that may limit fluid communication between the actuation devices and store a portion of the fluid in expandable membrane. The actuation devices may push or pull the fluid within the fluid conduit when the expandable membrane expands or contracts. The configuration and operation of the actuation devices may enable the collection, isolation, and dispensing of the dose volume.
1. A method for treating a microelectronic substrate, comprising:
providing a fluid delivery line that can contain a fluid,
providing an inlet device in fluid communication with the fluid delivery line, the inlet device capable of receiving a first inflow of fluid from the fluid delivery line, and comprising a sealing component having an open position that enables fluid communication through the inlet device and a closed position that prevents fluid communication through the inlet device;
providing an outflow device in fluid communication with the inlet device and comprising a sealing component having an open position that enables fluid communication through the outlet device and a closed position that prevents fluid communication through the outlet device;
providing a dose device disposed between and in fluid communication with the inlet device and the outlet device, the dose device comprising a dose storage component capable of receiving a dose volume within a storage area, a displacement component that displaces the dose volume towards the outlet device, and a sealing component having an open position that enables fluid communication through the dose device and a closed position that prevents fluid communication through the dose device; and
dispensing a dose volume of a dose chemical through the outlet device by mechanical actuation of the inlet device, outlet device and dose device into a larger amount of fluid or into a process chamber or bath for treating a microelectronic substrate.
2. The method of claim 1 , wherein the dose storage component of the dose device is primed to hold a dose volume within the storage area by placing the sealing component of the outlet device in a closed position.
3. The method of claim 1 , wherein the dose volume is dispensed in an amount sufficient to provide a mixed solution having a concentration of the dose chemical in the mixed solution equal to or less than 100 ppm.
4. The method of claim 1 , wherein the dose chemical comprises an acid or a colloidal fluid.
5. The method of claim 1 , wherein the inlet device comprises a dose storage component capable of receiving a dose volume within a storage area and dispensing a dose volume from the storage area.
6. The method of claim 5 , wherein the dose volume of the inlet device is dispensed from the storage area away from the direction of the larger amount of fluid, process chamber or bath for treating a microelectronic substrate.
7. The method of claim 1 , wherein the outlet device comprises a dose storage component capable of receiving a dose volume within a storage area and dispensing a dose volume from the storage area.
8. The method of claim 7 , wherein the dose volume of the outlet device is dispensed from the storage area away from the direction of the larger amount of fluid, process chamber or bath for treating a microelectronic substrate.
9. The method of claim 7 , wherein the dose volume of the outlet device is dispensed from the storage area in the direction of the larger amount of fluid, process chamber or bath for treating a microelectronic substrate.
10. The method of claim 1 , wherein the storage area defined at least in part by an expandable membrane.
11. The method of claim 10 , wherein the dose volume is displaced from the dose storage component by contraction of the membrane when the sealing component of the dose device is in the closed position.
12. The method of claim 10 , wherein the dose volume is displaced from the dose storage component by contraction of the membrane when the sealing component of the dose device is in the closed position.
13. The method of claim 10 , wherein the dose volume is displaced from the dose storage component by actuation of an actuation device when the sealing component of the dose device is in the closed position.
14. The method of claim 13 , wherein the actuation device is selected from a solenoid or a spring.
15. The method of claim 10 , wherein the dose volume is displaced from the dose storage component by actuation of an actuation device when the sealing component of the dose device is in the closed position.
16. The method of claim 15 , wherein the actuation device is selected from a solenoid or a spring.