Formulation for silicon-doped ink used to prevent chip etching
View Patent ↗An ink composition for used in an inkjet printer is provided. The ink composition includes a carrier medium, a colorant, and a silicon doping agent. The silicon doping agent may include silicic acid, silicon dioxide, or silicates. This silicon-doped ink reduces and prevents the etching of the silicon based components of the printhead. Silicon-doped inks protect the printhead from damage, thus improving printhead reliability and increasing printhead service life.
1. An ink composition for reducing the etching of a printhead component comprising:
a carrier medium;
a colorant; and
a silicon doping agent, wherein the silicon doping agent is silicic acid, and wherein the silicic acid comprises a type of silicic acid selected from the group consisting of: calcium salt silicic acid and aluminum salt silicic acid, and is added at an amount of at least 30 ppm-silicon and the silicon doping agent saturates the ink composition with silicon.
2. The ink composition of claim 1 , wherein the carrier medium includes an aqueous based medium.
3. The ink composition of claim 1 , wherein the carrier medium includes an organic solvent.
4. The ink composition of claim 1 , wherein the colorant includes a pigment, a dye, or combinations thereof.
5. The ink composition of claim 1 , further comprising a dispersant.
6. The ink composition of claim 1 , further comprising a humectant.
7. The ink composition of claim 1 , further comprising a surfactant.
8. The ink composition of claim 1 , further comprising a biocide.