Method for manufacturing an ink-jet head having nozzle openings with a constant width
First Claim
1. A method of manufacturing an ink-jet head comprising the steps of:
- forming an etch resist film on first and second sides of a silicon monocrystalline substrate having a face (110);
etching part of the etch resist film on said first side of said substrate to expose a first area of the silicon monocrystalline substrate so as to form cylindrical portions having sufficient diameter to discharge ink droplets;
etching a second exposed area on the second side of said substrate anisotropically to form a nozzle plate having a plurality of nozzle openings so as to have faces (1-11) and (-11-1) in the direction in which the nozzle openings are arrayed, wherein said nozzle openings are formed after the cylindrical portions are formed; and
laminating a spacer having a plurality of ink reservoirs, ink supply ports and ink cavities on the side of the second exposed area.
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Accused Products
Abstract
A nozzle plate has a plurality of nozzles for discharging ink which is fed from an ink reservoir to ink cavities through ink supply ports and is pressurized by a pressurizing element. In the nozzle plate, nozzle openings are formed in a silicon monocrystalline substrate with a lattice face (110) by anisotropic etching in such a way that through holes have faces (1-11) and (-11-1) in the direction in which the nozzle opening are arrayed as well as faces (111) and (11-1) in the direction of the axis of the ink cavity. The nozzle openings can be formed so as to have the faces (1-11) and (-11-1) normal to the silicon monocrystalline substrate in the direction in which the nozzle openings are arrayed. The width of the nozzle opening becomes constant irrespective of the time required to etch the substrate.
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Citations
16 Claims
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1. A method of manufacturing an ink-jet head comprising the steps of:
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forming an etch resist film on first and second sides of a silicon monocrystalline substrate having a face (110);
etching part of the etch resist film on said first side of said substrate to expose a first area of the silicon monocrystalline substrate so as to form cylindrical portions having sufficient diameter to discharge ink droplets;
etching a second exposed area on the second side of said substrate anisotropically to form a nozzle plate having a plurality of nozzle openings so as to have faces (1-11) and (-11-1) in the direction in which the nozzle openings are arrayed, wherein said nozzle openings are formed after the cylindrical portions are formed; and
laminating a spacer having a plurality of ink reservoirs, ink supply ports and ink cavities on the side of the second exposed area. - View Dependent Claims (2, 3, 4, 5, 11)
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6. A method of manufacturing an ink-jet head comprising the steps of:
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forming an etch resist film on first and second sides of a silicon monocrystalline substrate having a face (110);
etching part of the etch resist film on said first side of the silicon monocrystalline substrate to expose a first area of the silicon monocrystalline substrate so as to form cylindrical portions having sufficient diameter to discharge ink droplets;
etching the exposed first area isotropically to form recesses;
forming an etch resist film on the recesses;
etching part of the etch resist film on said second side of the silicon monocrystalline substrate so as to expose a second area of the silicon monocrystalline substrate to form a pattern suitable for anisotropically etching the recesses;
etching the exposed second area of the second side anisotropically to form a nozzle plate having a plurality of nozzle openings so as to have faces (1-11) and (-11-1) in the direction in which the nozzle openings are arrayed, wherein said nozzle openings are formed after the cylindrical portions are formed; and
laminating a spacer having a plurality of ink reservoirs, ink supply ports and ink cavities on the second side. - View Dependent Claims (7, 8, 9, 10, 12)
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13. A method of manufacturing an ink-jet head comprising the steps of:
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forming an etch resist film on first and second sides of a silicon monocrystalline substrate having a face (110);
etching part of the etch resist film on said first side of said substrate to expose a first area of the silicon monocrystalline substrate so as to form cylindrical portions having sufficient diameter to discharge ink droplets;
etching an exposed second area on the second side of said substrate anisotropically to form a plurality of nozzle openings so as to have faces (1-11) and (-11-1) in the direction in which the nozzle openings are arrayed, wherein said nozzle openings are formed after the cylindrical portions are formed;
laminating a spacer having a plurality of ink reservoirs, ink supply ports and ink cavities on the side of the second exposed area; and
forming other recesses in the area where the ink reservoir is positioned, on the side of the second exposed area.
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14. A method of manufacturing an ink-jet head comprising the steps of:
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forming an etch resist film on first and second sides of a silicon monocrystalline substrate having a face (110);
etching part of the etch resist film on said first side of said substrate to expose a first area of the silicon monocrystalline substrate so as to form cylindrical portions having sufficient diameter to discharge ink droplets;
etching an exposed second area on the second side of said substrate anisotropically to form a plurality of nozzle openings so as to have faces (1-11) and (-11-1) in the direction in which the nozzle openings are arrayed, wherein said nozzle openings are formed after the cylindrical portions are formed;
laminating a spacer having a plurality of ink reservoirs, ink supply ports and ink cavities on the side of the second exposed area; and
forming other recesses in the area where the ink supply ports are positioned, on the side of the second exposed area.
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15. A method of manufacturing an ink-jet head comprising the steps of:
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forming an etch resist film on first and second sides of a silicon monocrystalline substrate having a face (110);
etching part of the etch resist film on said first side of said substrate to expose a first area of the silicon monocrystalline substrate so as to form cylindrical portions having sufficient diameter to discharge ink droplets;
etching an exposed second area on the second side of said substrate anisotropically to form a plurality of nozzle openings so as to have faces (1-11) and (-11-1) in the direction in which the nozzle openings are arrayed, wherein said nozzle openings are formed after the cylindrical portions are formed, laminating a spacer having a plurality of ink reservoirs, ink supply ports and ink cavities on the side of the second exposed area; and
forming other recesses in the area where the ink reservoirs and the ink supply ports are positioned, on the side of the second exposed area.
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16. A method of manufacturing an ink-jet head comprising the steps of:
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forming an etch resist film on first and second sides of a silicon monocrystalline substrate having a face (110);
etching part of the etch resist film on said first side of said substrate to expose a first area of the silicon monocrystalline substrate so as to form cylindrical portions having sufficient diameter to discharge ink droplets;
etching an exposed second area on the second side of said substrate anisotropically to form a plurality of nozzle openings so as to have faces (1-11) and (-11-1) in the direction in which the nozzle openings are arrayed, wherein said nozzle openings are formed after the cylindrical portions are formed;
laminating a spacer having a plurality of ink reservoirs, ink supply ports and ink cavities on the side of the second exposed area;
removing all of said etch resist film; and
thermally oxidizing the exposed first and second areas of the nozzle plate.
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Specification