Precursor compositions and methods for the deposition of passive electrical components on a substrate
Precursor compositions for the deposition of electronic features such as resistors and dielectric components and methods for the deposition of the precursor compositions. The precursor compositions have a low viscosity, such as not greater than about 1000 centipoise and can be deposited using a direct-write tool. The precursors also have a low conversion temperature, enabling the formation of electronic features on a wide variety of substrates, including low temperature substrates.
1. A method for the fabrication of an inorganic resistor on a substrate, comprising the steps of:
(a) providing a substrate;
(b) depositing a resistor precursor composition onto said substrate using a direct-write tool, said resistor precursor composition having a viscosity of not greater than about 100 centipoise and comprising:
i) at least a first molecular precursor compound; and
ii) at least first particles selected from the group consisting of metal particles, metal oxide particles and carbon and carbon particles;
(c) heating said resistor precursor composition to a temperature of not greater than about 350° C. to convert said resistor precursor composition to an inorganic resistor.
2. A method as recited in claim 1 , wherein said substrate is an organic substrate.
3. A method as recited in claim 1 , wherein said substrate comprises polyimide.
4. A method as recited in claim 1 , wherein said resistor precursor composition comprises a molecular precursor compound to a metal.
5. A method as recited in claim 1 , wherein said resistor precursor composition comprises a molecular precursor compound to a transition metal.
6. A method as recited in claim 1 , wherein said resistor precursor composition comprises a molecular precursor compound to silver.
7. A method as recited in claim 1 , wherein said resistor precursor composition comprises a molecular precursor compound to a metal oxide.
8. A method as recited in claim 1 , wherein said first particles comprise metal particles.
9. A method as recited in claim 1 , wherein said depositing step comprises depositing said precursor composition using an ink-jet device.
10. A method as recited in claim 1 , wherein said depositing step comprises depositing said precursor composition using an aerosol jet.
11. A method as recited in claim 1 , wherein said heating step comprises heating to a temperature of not greater than about 250° C.
12. A method as recited in claim 1 , further comprising the step of modifying a first portion of said substrate, wherein said first portion is adapted to confine said deposited resistor precursor composition.
13. A method as recited in claim 1 , further comprising the step of modifying a first portion of said substrate, wherein said first portion is modified to have a surface energy that is different than the surface energy on a second portion of said substrate, and wherein said first portion is adapted to confine said deposited resistor precursor composition.
14. A method as recited in claim 12 , wherein said step of modifying a first portion comprises coating said first portion with a hydrophobic surface agent.
15. A method as recited in claim 12 , wherein said step of modifying a first portion comprises coating said first portion with a hydrophilic surface agent.
16. A method as recited in claim 1 , wherein said resistor precursor composition further comprises a reducing agent.
17. A method as recited in claim 8 , wherein said metal particles comprise silver.
18. A method as recited in claim 17 , wherein said metal particles further comprise platinum.
19. A method as recited in claim 17 , wherein said metal particles further comprise palladium.
20. A method as recited in claim 8 , wherein said metal particles comprise NiCr.
21. A method as recited in claim 8 , wherein said first molecular precursor compound is a precursor to an insulative phase.
22. A method as recited in claim 21 , wherein said insulative phase comprises a glass.
23. A method as recited in claim 8 , wherein said resistor precursor composition further comprises second particles, wherein said second particles comprise glass particles.
24. A method as recited in claim 8 , wherein said metal particles comprise nanoparticles.
25. A method as recited in claim 1 , wherein said first particles comprise metal oxide particles.
26. A method as recited in claim 25 , wherein said metal oxide particles comprise complex metal oxide particles.
27. A method as recited in claim 25 , wherein said metal oxide particles comprise ruthenate particles.
28. A method as recited in claim 25 , wherein said metal oxide particles comprise ruthenate particles selected from the group consisting of lead ruthenate and bismuth ruthenate particles.
29. A method as recited in claim 25 , wherein said metal oxide particles comprise nanoparticles.
30. A method as recited in claim 1 , wherein said first particles comprise glass particles.
31. A method as recited in claim 30 , wherein said glass particles comprise borosilicate glass particles.
32. A method as recited in claim 1 , wherein said first particles are carbon particles.
33. A method as recited in claim 32 , wherein said carbon particles comprise graphitic carbon.
34. A method as recited in claim 1 , wherein said resistor precursor composition comprises not greater than about 75 wt. % particles.
35. A method as recited in claim 1 , wherein said resistor precursor composition comprises from about 5 wt. % to about 50 wt. % particles.
36. A method as recited in claim 1 , wherein said resistor precursor composition comprises from about 5 to about 50 wt. % nanoparticles.
37. A method as recited in claim 1 , wherein said resistor precursor composition comprises from about 30 wt. % to about 60 wt. % of said molecular precursor compound.
38. A method as recited in claim 1 , wherein said molecular precursor compound comprises ruthenium.