What is claimed is:
1. An ink-jet printhead having a hemispherical ink chamber, comprising:
a substrate, in which a manifold for supplying ink, an ink chamber having a substantially hemispherical shape and filled with ink to be ejected, and an ink channel for supplying ink from the manifold to the ink chamber are integrally formed into one body;
a nozzle plate having a multi-layered structure, in which a first insulating layer, a thermally conductive layer formed of a thermally conductive material, and a second insulating layer are sequentially stacked, and having a nozzle, through which ink is ejected, formed at a location corresponding to a center of the ink chamber;
a nozzle guide having a multi-layered structure and extending from an edge of the nozzle to an interior of the ink chamber;
a heater formed on the nozzle plate to surround the nozzle; and
an electrode formed on the nozzle plate to be electrically connected to the heater and to supply current to the heater.
2. The ink-jet printhead as claimed in claim 1, wherein the heater is formed in a ring-shape.
3. The ink-jet printhead as claimed in claim 1, wherein the heater is formed in the shape of the Greek letter omega.
4. The ink-jet printhead as claimed in claim 1, wherein the manifold is formed at a bottom of the substrate, and the ink channel is formed to a predetermined depth of the substrate so that the ink channel is in flow communication with the manifold and the ink chamber.
5. The ink-jet printhead as claimed in claim 1, wherein the manifold is formed at the bottom of the substrate, and the ink channel is formed to be in flow communication with the manifold at the bottom of the ink chamber.
6. The ink-jet printhead as claimed in claim 1, wherein the nozzle guide is formed by extending the thermally conductive layer and the first insulating layer of the nozzle plate, and the thermally conductive layer is formed to have a multi-layered structure, in which the thermally conductive layer is surrounded by the first insulating layer.
7. The ink-jet printhead as claimed in claim 1, wherein the first and second insulating layers are formed of an oxide layer.
8. The ink-jet printhead as claimed in claim 1, wherein the first and second insulating layers are formed to a thickness of between about 500-2000 .
9. The ink-jet printhead of claim 1, wherein the thermally conductive layer is formed of polysilicon.
10. A method for manufacturing an ink-jet printhead having a hemispherical chamber, comprising:
forming a ring-shaped groove for forming a nozzle guide at a surface of a substrate;
forming a nozzle plate and a nozzle guide having a multi-layered structure and including a thermally conductive layer formed at the surface of the substrate;
forming a heater having an interior diameter and an exterior diameter on the nozzle plate;
forming a manifold for supplying ink by etching the substrate;
forming an electrode on the nozzle plate to be electrically connected to the heater;
forming a nozzle by etching the nozzle plate within the interior diameter of the heater to have a diameter nearly equal to the diameter of the nozzle guide;
forming an ink chamber in a substantially hemispherical shape by etching the substrate exposed through the nozzle; and
forming an ink channel for supplying ink from the manifold to the ink chamber by etching the substrate.
11. The method as claimed in claim 10, wherein forming the nozzle plate and the nozzle guide comprises:
forming a first insulating layer at the surface of the substrate and inner surfaces of the ring-shaped groove;
forming the thermally conductive layer by depositing polysilicon on the first insulating layer and simultaneously forming the nozzle guide by filling the polysilicon in the ring-shaped groove; and
forming a second insulating layer on the thermally conductive layer.
12. The method of claim 11, wherein the first and second insulating layers are formed to a thickness of between about 500-2000 , and the thermally conductive layer is formed to a thickness of between about 1-2 m.
13. The method as claimed in claim 10, wherein the ink channel is formed to be in flow communication with the manifold by anisotropically etching the substrate at the bottom of the ink chamber to have a predetermined diameter.
14. The method as claimed in claim 10, wherein forming the ink channel comprises:
forming a groove for forming the ink channel, through which the substrate is exposed, by etching the nozzle plate beyond the exterior diameter of the heater and the manifold; and
isotropically etching the substrate exposed through the groove.
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. A protective sheath for a portable electronic device having a display surface and a rear surface opposite to the display surface, wherein the protective sheath comprises:
a front plate, capable of covering the display surface and having a first side edge;
a holding component, having an inner surface, an outer surface opposite to the inner surface and a second side edge proximal to the front plate, wherein the holding component is capable of holding the portable electronic device on the inner surface from the rear surface;
a position limiting hinge, disposed on the outer surface; and
a support plate, having a third side edge and a fourth side edge opposite to the third side edge, wherein the third side edge is pivoted to the outer surface via the position limiting hinge, and the front plate is capable of rotating relative to the holding component due to the first side edge connects with the second side edge, or capable of rotating relative to the support plate due to the first side edge connects with the fourth side edge, when the support plate rotates relative to the holding component for a presetting pivoting angle, the position limiting hinge maintains the presetting pivoting angle between the support plate and the holding component, so as to let the portable electronic device stand on a carrying surface.
2. The protective sheath as claimed in claim 1, wherein the holding component further has a fifth side edge opposite to the second side edge, a sixth side edge connecting the second side edge and the fifth side edge, a seventh side edge opposite to the sixth side edge and a center region located among the second side edge, the fifth side edge, the sixth side edge and the seventh side edge, and the position limiting hinge is disposed on the fifth side edge or the center region, or extending from the sixth side edge to the seventh side edge.
3. The protective sheath as claimed in claim 1, wherein the holding component is a silicon case, a leather case or a plastic case.
4. The protective sheath as claimed in claim 1, wherein the holding component comprises a rear plate having the inner surface, the outer surface and the second side edge, and a silicon case, a leather case, a plastic case or at least an elastic tape disposed on the inner surface.
5. The protective sheath as claimed in claim 1, wherein the holding component comprises:
a rear plate, having the inner surface, the outer surface and the second side edge; and
a plurality of hooks, disposed on at least a part of a periphery of the rear plate excepting the second side edge.
6. The protective sheath as claimed in claim 5, wherein the hooks are further disposed on at least a part of a periphery of the support plate excepting the third side edge and the fourth side edge.
7. The protective sheath as claimed in claim 1, wherein the position limiting hinge comprises:
a first metal sheet, fastened to the outer surface;
a second metal sheet, fastened to the third side edge; and
at least a shaft, pivoted between where the first metal sheet protruding out of the outer surface and where the second metal sheet proximal to the first metal sheet.
8. The protective sheath as claimed in claim 7, wherein the first metal sheet comprises:
a first main plate, disposed on the outer surface;
a first folded plate, disposed on the inner surface;
a second folded plate, passing through the holding component and connected between the first main plate and the first folded plate;
at least a first circular folded plate, wherein the shaft is fitted into the first circular folded plate; and
at least a first connecting plate, connected between the first main plate and the first circular folded plate.
9. The protective sheath as claimed in claim 8, wherein the holding component further has a first dent on the outer surface, a second dent on the inner surface and a first slit extending from the inner surface to the outer surface, the first main plate is embedded within the first dent, the first folded plate is embedded within the second dent, and the second folded plate is embedded within the first slit.
10. The protective bag as claimed in claim 7, wherein the second metal sheet comprises:
a second main plate, disposed on a first surface of the support plate facing the rear surface or the outer surface;
a third folded plate, disposed on a second surface of the support plate opposite to the first surface;
a fourth folded plate, passing through the support plate and connected between the second main plate and the third folded plate;
at least a second circular folded plate, wherein the shaft is fitted into the second circular folded plate; and
at least a second connecting plate, connected between the second main plate and the second circular folded plate.
11. The protective sheath as claimed in claim 10, wherein the support plate further has a third dent on the first surface, a fourth dent on the second surface and a second slit extending from the first surface to the second surface, the second main plate is embedded within the third dent, the third folded plate is embedded within the fourth dent, and the fourth folded plate is embedded within the second slit.
12. The protective sheath as claimed in claim 7, wherein the position limiting hinge comprises two shafts, the first metal sheet comprises two first circular folded plates, the second metal sheet comprises two second circular folded plates, and each of the shafts is fitted into one of the first circular folded plates and a corresponding one of the second circular folded plates.
13. The protective sheath as claimed in claim 12, wherein both of the first circular folded plates are located between or outside the second circular folded plates.
14. The protective sheath as claimed in claim 7, wherein the shaft is a combination of a nut and a bolt.
15. The protective sheath as claimed in claim 7 wherein the first metal sheet is fastened to the outer surface by melt bonding, fastening, attaching with adhesive, screwing, riveting or a combination thereof.
16. The protective sheath as claimed in claim 7, wherein the second metal sheet is fastened to the third side edge by melt bonding, fastening, attaching with adhesive, screwing, riveting or a combination thereof.
17. The protective sheath as claimed in claim 1, wherein the holding component further has an adhesive portion disposed on the inner surface, and the portable electronic device is capable of being held on the inner surface by attaching the adhesive portion to the rear surface.
18. The protective sheath as claimed in claim 1, wherein the holding component further has a permanent magnet, and the portable electronic device further has another permanent magnet or a ferromagnetic material corresponding to the permanent magnet in position.
19. The protective sheath as claimed in claim 1, wherein the position limiting hinge is a hinge with a close fit structure or a position limiting structure.
20. The protective sheath as claimed in claim 1, wherein the position limiting hinge is an embedded hinge.
21. The protective sheath as claimed in claim 1, wherein the position limiting hinge is an exposed hinge.