摘要:
A manufacturing method of an ink-jet recording head for improving relative positional accuracy between a piezoelectric element and a pressure generating chamber to improve ink ejection characteristics and stability thereof. The manufacturing method includes the steps of: forming a passage-forming layer on a passage-forming substrate and imparting etching selectivity to a region that will be a space portion of the passage-forming layer; forming a vibration plate on the passage-forming layer and a piezoelectric element; performing anisotropic etching on the passage-forming substrate to form a penetrated portion at least to a region that will be the space portion, etching the passage-forming layer to form the space portion, and forming a pressure generating chamber opposite the space portion; and joining a nozzle plate to the passage-forming substrate.
摘要:
Disclosed is an ink-jet recording head improving relative positional accuracy between a piezoelectric element and a pressure generating chamber to improve ink ejection characteristics and stability thereof, capable of arraying pressure generating chambers in high density, and reducing cross talk between the pressure generating chambers. Moreover, disclosed are a manufacturing method of the same and an ink-jet recording apparatus having the ink-jet recording head built therein. The ink-jet recording head comprises: a passage-forming substrate 10 having a pressure generating chamber 11 formed therein, which communicates with a nozzle orifice; and a piezoelectric element 300 formed of a thin film and by a lithography method in a region corresponding to the pressure generating chamber 11 via a vibration plate constituting a portion of the pressure generating chamber 11. The ink-jet recording head is characterized in that a space portion 41 communicating with the pressure generating chamber 11 and having at least one surface constituted of the vibration plate is provided in the region between the passage-forming substrate 10 and the vibrating plate, the region being opposite the pressure generating chamber 11, and at least a width of the pressure generating chamber 11 close to the space portion 41, is set to be equal to a width of the space portion 41 or less, thus relative positional accuracy between the pressure generating chamber 11 and the piezoelectric element 300 is improved.
摘要:
Disclosed is a method of manufacturing a liquid jet head, which enables a passage-forming substrate to be easily handled, thus realizing good formation of pressure generating chambers and an improvement in manufacturing efficiency. The method includes the steps of: forming a vibration plate and piezoelectric elements on one surface of the passage-forming substrate; thermally adhering a reinforcing substrate for reinforcing the rigidity of the passage-forming substrate, onto the passage-forming substrate; processing the passage-forming substrate to have a predetermined thickness; depositing an insulation film on other surface of the passage-forming substrate at lower temperature than that for adhering the passage-forming substrate and the reinforcing substrate, and patterning the insulation film into a predetermined shape; and etching the passage-forming substrate using the patterned insulation film as a mask to form the pressure generating chambers. Thus, handling of the passage-forming substrate becomes easy, and the pressure generating chambers can be formed with high precision.
摘要:
Disclosed are an ink-jet recording head, in which nozzles can be arrayed in high density and a manufacturing cost thereof is reduced, and an ink-jet recording apparatus. In an ink-jet recording head, comprising: a pressure generating chamber (12) communicating with a nozzle orifice; and a piezoelectric element (300) having a lower electrode (60), a piezoelectric layer (70) and an upper electrode (80), the piezoelectric element (300) being provided in a region corresponding to the pressure generating chamber (12) with a vibration plate interposed therebetween, the piezoelectric element (300) includes a piezoelectric active portion (320) as a substantial drive portion and a piezoelectric non-active portion (330) having the piezoelectric layer (70) continuous from the piezoelectric active portion (320) but not being substantially driven, and a stress suppression layer (100) for suppressing stress due to drive of the piezoelectric element (300) is provided, straddling a boundary between the piezoelectric active portion (320) and the piezoelectric non-active portion (330).
摘要:
An ink-jet printing head comprises: a pressurizing chamber substrate having first and second sides opposing each other; a plurality of pressurizing chambers formed on the first side of the pressurizing chamber substrate; channels formed on the second side of the pressuring chamber substrate to be opposite to the pressuring chambers, respectively; oscillating plate films for pressurizing ink within the respective pressurizing chambers; and piezoelectric thin-film elements, each having upper and lower electrodes and a piezoelectric film sandwiched between the upper and lower electrodes, the piezoelectric thin-film being formed in the channel, wherein at least the upper electrode is formed to have a narrower width than that of the pressurizing chamber. And a method for producing the ink-jet head.
摘要:
Provided is a liquid jet head, a method of manufacturing the same, and a liquid jet apparatus, in which liquid ejecting characteristics can be kept constant for a long period and in which nozzle blockage is prevented. In a liquid jet head including a passage-forming substrate (10) which is made of a single crystal silicon substrate and in which pressure generating chambers (12) communicating with nozzle orifices are formed, and pressure generating elements (300) for causing pressure changes in the pressure generating chambers (12), a protective film (100) which is made of tantalum oxide and has resistance to liquid, is provided at least on the inner wall surfaces of the pressure generating chambers (12).
摘要:
A piezoelectric thin film element is provided that functions well as an actuator, that yields the desired composition, and that exhibits good piezoelectric thin film distortion characteristics. A lower electrode is formed on a substrate, a piezoelectric thin film precursor thin film layer is formed on the lower electrode, this is subjected to patterning, and a heating solution is applied to the substrate to implement hydrothermal processing, thereby selectively crystallizing the precursor thin film layer and yielding a piezoelectric thin film layer.
摘要:
An ink-jet printing head comprises: a pressurizing chamber substrate having first and second sides opposing each other; a plurality of pressurizing chambers formed on the first side of the pressurizing chamber substrate; channels formed on the second side of the pressuring chamber substrate to be opposite to the pressuring chambers, respectively; oscillating plate films for pressurizing ink within the respective pressurizing chambers; and piezoelectric thin-film elements, each having upper and lower electrodes and a piezoelectric film sandwiched between the upper and lower electrodes, the piezoelectric thin-film being formed in the channel, wherein at least the upper electrode is formed to have a narrower width than that of the pressurizing chamber. And a method for producing the ink-jet head.
摘要:
Disclosed is a method of manufacturing a liquid jet head, which enables a passage-forming substrate to be easily handled, thus realizing good formation of pressure generating chambers and an improvement in manufacturing efficiency. The method includes the steps of: forming a vibration plate and piezoelectric elements on one surface of the passage-forming substrate; thermally adhering a reinforcing substrate for reinforcing the rigidity of the passage-forming substrate, onto the passage-forming substrate; processing the passage-forming substrate to have a predetermined thickness; depositing an insulation film on other surface of the passage-forming substrate at lower temperature than that for adhering the passage-forming substrate and the reinforcing substrate, and patterning the insulation film into a predetermined shape; and etching the passage-forming substrate using the patterned insulation film as a mask to form the pressure generating chambers. Thus, handling of the passage-forming substrate becomes easy, and the pressure generating chambers can be formed with high precision.
摘要:
The present invention provides a thin piezoelectric film having a high piezoelectric strain constant and a good adhesion with a lower electrode which can be produced without being cracked. The present invention also provides an ink jet recording head comprising this thin piezoelectric film as a vibrator. The thin piezoelectric film element of the present invention comprises a PZT film 14 made of a polycrystalline substance, and an upper electrode 16 and a lower electrode 12 arranged with the PZT film interposed therebetween. The grain boundary of the crystalline constituting the PZT film is present almost perpendicular to the surface of the electrode. Further, the orientation of the crystalline constituting the PZT film is controlled to a desired range.