1. A liquid ejecting printing head comprising:
a printing element substrate having an ejection port for ejecting a liquid;
a supporting member having a face to which the printing element substrate is bonded, thereby supporting the printing element substrate on the face;
a sealant for sealing one side face of the printing element substrate and another side face which is an opposite face of the one side face; and
ribs which are formed along and opposing the one side face and the other side face,
wherein the sealant is disposed at a region between the one side face and one of the ribs, as well as at a region between the other side face and another of the ribs, and
the sealant is not provided at a back side of the ribs, the back side of the ribs not facing the printing element substrate.
2. The printing head as set forth in claim 1, wherein two of the ribs are positioned behind the printing element substrate.
3. The printing head as set forth in claim 1, wherein at least one of the ribs is formed integrally with the supporting member.
4. The printing head as set forth in claim 1, wherein at least one of the ribs is formed separately from the supporting member.
5. The printing head as set forth in claim 1, wherein at least one of the ribs is installed along the entire width of the printing element substrate.
6. The printing head as set forth in claim 1, wherein the sealant is used to seal between the ribs and the printing element substrate.
7. The printing head as set forth in claim 1, wherein
a height from a base of at least one of the ribs to a top part thereof is greater than a thickness of the printing element substrate.
8. The printing head as set forth in claim 7, wherein
the base of at least one of the ribs is positioned at a position lower than the face of the supporting member bonded to the printing element substrate.
9. The printing head as set forth in claim 7, wherein
a part of the face of the supporting member to which the printing element substrate is bonded receives the sealant between the ribs and the printing element substrate.
10. A liquid ejecting printing head comprising:
a printing element substrate having an ejection port for ejecting a liquid;
a supporting member having a face to which the printing element substrate is bonded, thereby supporting the printing element substrate on the face;
a sealant for sealing one side face of the printing element substrate and another side face which is an opposite face of the one side face; and
a plate-like members which are formed along and opposing the one side face and the other side face,
wherein the sealant is disposed at a region between the one side face and one of the plate-like members as well as at a region between the other side face and another of the plate-like members, and
the sealant is not provided at a back side of the plate-like members, the back side of the plate-like members not facing the printing element substrate.
11. The printing head according to claim 10, wherein a tip of at least one of the plate-like members can be displaced in a direction of the one side face of the printing element substrate.
12. The printing head according to claim 10, wherein an intersection point of at least one of the plate-like members with the supporting member is positioned at a position lower than the face of the supporting member.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An inkjet printer comprising:
an inkjet printhead comprising at least one corrodible structure comprised of silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide, said corrodible structure having a surface exposed to ink; and
an ink reservoir containing said ink, said ink reservoir being in fluid communication with said printhead,
wherein said ink comprises:
water;
a dye; and
a metal additive for minimizing corrosion of said exposed surface, said metal additive comprising one or more metals selected from the group consisting of: Al(III), Fe(III), Fe(II), Cu(II), Cu(I), Bi(III), Cr(III), Mg(II), Sr(II), Ba(II), Ce(III), Ag(I), Al, Fe, Ce, Cu, Cr, Mg and Ag.
2. The inkjet printer of claim 1, wherein metal additive comprises one or metals selected from the group consisting of: Al(III) and Fe(III).
3. The inkjet printer of claim 1, wherein said metal additive comprises one or more metals selected from the group consisting of: aluminium nitrate nonahydrate, iron(III) nitrate nonahydrate; iron(III) hydroxide, ammonium iron(III) sulfate, iron(III) sulfate heptahydrate, iron(III) chloride and iron(III) bromide.
5. The inkjet printer of claim 1, wherein said metal additive is contained in said ink in a concentration in the range of 0.01 to 200 ppm.
6. The inkjet printer of claim 1, wherein said ink comprises 0.01 to 25 wt. % of said dye.
7. The inkjet printer of claim 1, wherein said dye comprises one or more sulfonate groups.
8. The inkjet printer of claim 7, wherein said dye comprises one or more counterions selected from the group consisting of: ammonium, potassium and sodium.
9. The inkjet printer of claim 7, wherein said dye is an azo dye.
10. The inkjet printer of claim 1, wherein said metal additive is contained in said ink in particulate form, and wherein an average particle size of said metal additive is in the range of 0.01 to 2 microns.
11. The inkjet printer of claim 1, wherein said printhead comprises a plurality of nozzle chambers, each nozzle chamber comprising at least one structure comprised of silicon nitride.
12. The inkjet printer of claim 11, wherein a roof of each nozzle chamber defines part of a nozzle plate for said printhead, wherein said nozzle plate is comprised of silicon nitride.
13. The inkjet printer of claim 1, wherein said printhead comprises a plurality of nozzle chambers, each nozzle chamber comprising at least one structure comprised of silicon oxide.
14. The inkjet printer of claim 1, wherein said printhead comprises CMOS layers having at least one layer of BPSG exposed to said ink.
15. The inkjet printer of claim 1, wherein said printhead comprises CMOS layers, having at least one layer of silicon oxide exposed to said ink.
16. The inkjet printer of claim 12, wherein said printhead comprises a plurality of ink inlets defined by openings through said CMOS layers.
17. The inkjet printer of claim 11, wherein each nozzle chamber comprises an actuator selected from the group consisting of:
a heater element for heating at least some of the ink to a temperature sufficient to cause formation of a bubble in the nozzle chamber; and
a thermal bend actuator comprised of: a passive beam and a thermoelastic active beam fused to the passive beam.
18. An inkjet ink comprising:
water;
0.01 to 25 wt. % of a dye having one or more sulfonate groups, wherein said dye comprises one or more counterions selected from the group consisting of: potassium, sodium and ammonium; and
a metal additive for minimizing corrosion of corrodible surfaces in an inkjet printhead, said metal additive comprising one or more metals selected from the group consisting of: Al(III), Fe(III), Fe(II), Cu(II), Cu(I), Bi(III), Cr(III), Mg(II), Sr(II), Ba(II), Ce(III), Ag(I), Al, Fe, Ce, Cu, Cr, Mg and Ag.
19. The inkjet ink of claim 18, wherein said dye comprises a potassium counterion.
20. A kit comprising:
a printer having an inkjet printhead, said inkjet printhead comprising at least one structure comprised of silicon nitride, borophosphosilicate glass (BPSG) or silicon oxide, said structure having a surface exposed to ink; and
at least one ink cartridge for installation in said printer, said ink cartridge containing an inkjet ink, wherein said ink comprises:
water;
a dye; and
a metal additive for minimizing corrosion of said exposed surface, said metal additive comprising one or more metals selected from the group consisting of: Al(III), Fe(III), Fe(II), Cu(II), Cu(I), Bi(III), Cr(III), Mg(II), Sr(II), Ba(II), Ce(III), Ag(I), Al, Fe, Ce, Cu, Cr, Mg and Ag.