Temperature control system which sprays liquid coolant droplets against an IC-module and directs radiation against the IC-module
View Patent ↗A system for maintaining an IC-chip near a set-point temperature while electrical power dissipation in the IC-chip is varied includes a container having an open end with a seal ring. Located in the container is at least one nozzle for spraying liquid coolant droplets on a portion of an IC-module which holds the IC-chip. This spraying of the liquid coolant occurs while the seal ring is pressed against the IC-module. Further, at least one window is provided in the container such that it passes energy by electromagnetic radiation from a radiation source to the IC-module, but blocks the liquid coolant.
1. A system for maintaining an IC-module near a set-point temperature while electrical power dissipation is said IC-module is varied; said system being comprised of:
a container having an open end with a seal for pressing against said IC-module;
at least one nozzle, in said container;
at least one window, in said container; and,
a closed-loop control means for—a) receiving a sensor signal representing a sensed temperature of said IC-module, b) cooling said IC-module, if said sensed temperature exceeds said set-point, by spraying a liquid coolant from said nozzle onto said IC-module, and c) heating said IC-module, if said set-point exceeds said sensed temperature, by sending electromagnetic radiation through said window onto said IC-module.
2. A system according to claim 1 wherein said closed-loop control means sends said radiation through said window with a ON-OFF ratio that increase as the difference between said set-point and said sensed temperature increases.
3. A system according to claim 1 wherein said nozzle is replicated at spaced-apart locations in said container, and said window is replicated between said spaced-apart locations.
4. A system according to claim 1 wherein said window is transparent to infrared radiation, but blocks said coolant in both a liquid state and a gas state.
5. A system according to claim 1 wherein said nozzle is replicated at spaced-apart locations in said container, said closed-loop control means sends a control signal to each nozzle, and each nozzle ejects just a single droplet of said liquid coolant when it receives said control signal.
6. A system according to claim 5 wherein said closed-loop control means sends said control signal to all of said nozzles simultaneously with a frequency that increases as the difference between said sensed temperature and said set-point increases.
7. A system according to claim 5 wherein said closed-loop control means sends said control signal to a subset of said nozzles simultaneously, and increase the number of nozzles in said subset as the difference between said sensed temperature and said set-point increases.
8. A system according to claim 5 wherein each nozzle ejects said droplet by squeezing said coolant with a piezoelectric device.
9. A system according to claim 5 wherein each nozzle ejects said droplet by heating said coolant with an electric heater.
10. A system according to claim 1 wherein said closed-loop control means sends a control signal to each nozzle, and each nozzle sprays multiple droplets of said liquid coolant when it receives said control signal.
11. A system according to claim 10 wherein said closed-loop control means generates said control signal with an ON-OFF ratio that increases as the difference between said sensed temperature and said set-point increases.
12. A system according to claim 1 wherein said seal is shaped to encircle a surface on said IC-module which enclosed an IC-chip.
13. A system according to claim 1 wherein said seal is shaped to encircle an exposed surface on an IC-chip in said IC-module.