N-well and other implanted temperature sense resistors in inkjet print head chips
View Patent ↗An inkjet print head chip having MOS logic blocks that also includes temperature sense resistors implanted in the chip. These resistors are preferably made of N-Well material.
1. Apparatus comprising:
inkjet print head chip having a silicon substrate and MOS logic blocks, resistor elements to heat the chip, and a controller of the resistor elements; and
temperature sense resisters implanted in the silicon substrate of the print head chip and comprising atoms of an implantation material, wherein the atoms of the implantation material are embedded beneath the substrate surface, the temperature sense resistors being operatively connected to the controller of the resistor elements to enable the controller to monitor the chip temperature to control the resistor elements to beat the chip.
2. The apparatus of claim 1 , wherein the temperature sense resistors have a sheet resistance of at least 20 Ω/□ and a temperature coefficient of resistivity of at least 0.0010 Ω/° C.
3. The apparatus of claim 1 , wherein the temperature sense resistors have a sheet resistance of at least 75 Ω/□ and a temperature coefficient of resistivity of at least 0.0020 Ω/° C.
4. The apparatus of claim 1 , wherein the temperature sense resistors have a sheet resistance of at Least 500 Ω/□ and a temperature coefficient of resistivity of at least 0.0030 Ω/° C.
5. The apparatus of claim 1 , wherein the temperature sense resistors have a sheet resistance of at least 1000 Ω/□ and a temperature coefficient of resistivity of at least 0.0040 Ω/° C.
6. The apparatus of claim 1 , wherein the temperature sense resistors comprise N-Well material.
7. The apparatus of claim 1 , wherein the temperature sense resistors comprise NSD material.
8. The apparatus of claim 1 , wherein the temperature sense resistors comprise LDD material.
9. The apparatus of claim 1 , wherein the temperature sense resistors comprise PSD material.
10. The apparatus of any claim 1 , wherein the inkjet print head chip includes 1–1000 temperature sense resistors.
11. The apparatus of claim 1 , wherein each temperature sense resistor is 0.05–5000 μm wide by 0.01–400,000 μm long by 0.05–4 μm thick.
12. The apparatus of claim 1 , wherein each temperature sense resistor is 1–2000 μm wide by 1–200,000 μm long by 0.1–3μm thick.
13. The apparatus of claim 1 , wherein each temperature sense resistor is 2–1000 μm wide by 2–100,000 μm long by 0.2–2μm thick.
14. The apparatus of claim 13 , further comprising an ink jet printer comprising the inkjet print head.
15. The apparatus of claim 1 , further comprising an inkjet print head comprising; the inkjet print head chip.
16. A method of controlling the temperature of an inkjet print head chip having a substrate and MOS logic blocks, comprising:
providing the print head chip with at least one substrate heater to heat the chip;
providing the print head chip with a controller of the substrate heater;
implanting temperature sense resistors in the substrate of the chip, wherein the operation of implanting comprises directing a beam of energetic ions incident upon the substrate to embed those ions into the substrate;
operatively connecting the temperature sense resistors to the controller of the substrate heater to enable the controller to monitor the chip temperature to control the substrate heater to heat the chip; and
using the controller to control the substrate heater to heat the chip.
17. The method of claim 16 , wherein the temperature sense resistors have a sheet resistance of at least 20 Ω/□ and a temperature coefficient of resistivity of at least 0.0010 Ω/° C.
18. The method of claim 16 , wherein the temperature sense resistors have a sheet resistance of at least 20 Ω/□ and a temperature coefficient of resistivity of at least 0.0020 Ω/° C.
19. The method of claim 16 , wherein the temperature sense resistors have a sheet resistance of at least 500 Ω/□ and a temperature coefficient of resistivity of at least 0.0030 Ω/° C.
20. The method of claim 16 , wherein the temperature sense resistors have a sheet resistance of at least 1000 Ω/□ and a temperature coefficient of resistivity of at least 0.0040 Ω/° C.
21. The method of claim 16 , wherein the temperature sense resistors comprise N-Well material.
22. The meted of claim 16 , wherein the temperature sense resistors comprise NSD material.
23. The method of claim 16 , wherein the temperature sense resistors comprise LDD material.
24. The method of claim 16 , wherein the temperature sense resistors comprise PSD material.
25. The method of claim 16 , wherein the inkjet print head chip includes 1–1000 temperature sense resistors.
26. The method of claim 16 , wherein each temperature sense resistor is 0.05–5000 μm wide by 0.01–400,000 μm long by 0.0.5–4 μm thick.
27. The method of claim 16 , wherein each temperature sense resistor is 1–2000 μm wide by 1–200,000 μm long by 0.–3 μm thick.
28. The method of claim 16 , wherein each temperature sense resistor is 2–1000 μm wide by 2–100,000 μm long by 0.2–2 μm thick.
29. The method of claim 16 , further comprising installing the inkjet print head chip in an inkjet print head.
30. The method of claim 29 , further comprising installing the inkjet print head in an inkjet printer.
31. The invention of claim 16 , wherein the MOS logic blocks are CMOS logic blocks.