Liquid delivering apparatus and method of producing the same
First Claim
1. A liquid delivering apparatus, comprising:
- a flow-passage unit including an opening and a pressure chamber which accommodates liquid and which communicates with the opening, the flow-passage unit including a first outer side edge and a second outer side edge opposite the first outer side edge;
an oscillating plate which partially defines the pressure chamber and which includes an extending portion that initially extends from the first outer side edge of the flow-passage unit to an outside thereof so as to be away from the second outer side edge;
a piezoelectric material layer which is one of directly and indirectly stacked on the oscillating plate and which deforms upon application of an electric field thereto so as to oscillate the oscillating plate for delivering the liquid from the pressure chamber through the opening;
an electrode pattern and a drive circuit which apply the electric field to the piezoelectric material layer, the electrode pattern being one of directly and indirectly provided on the oscillating plate, the drive circuit is one of directly and indirectly mounted on the extending portion of the oscillating plate; and
a heat dissipating member provided on the extending portion in the vicinity of the drive circuit.
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Accused Products
Abstract
A liquid delivering apparatus, including a flow-passage unit including an opening and a pressure chamber which accommodates liquid and which communicates with the opening; an oscillating plate which partially defines the pressure chamber; a piezoelectric material layer which is one of directly and indirectly stacked on the oscillating plate and which deforms upon application of an electric field thereto so as to oscillate the oscillating plate for delivering the liquid from the pressure chamber through the opening; and an electrode pattern and a drive circuit which apply the electric filed to the piezoelectric material layer. The drive circuit and the electrode pattern are one of directly and indirectly provided on the oscillating plate.
16 Citations
22 Claims
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1. A liquid delivering apparatus, comprising:
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a flow-passage unit including an opening and a pressure chamber which accommodates liquid and which communicates with the opening, the flow-passage unit including a first outer side edge and a second outer side edge opposite the first outer side edge; an oscillating plate which partially defines the pressure chamber and which includes an extending portion that initially extends from the first outer side edge of the flow-passage unit to an outside thereof so as to be away from the second outer side edge; a piezoelectric material layer which is one of directly and indirectly stacked on the oscillating plate and which deforms upon application of an electric field thereto so as to oscillate the oscillating plate for delivering the liquid from the pressure chamber through the opening; an electrode pattern and a drive circuit which apply the electric field to the piezoelectric material layer, the electrode pattern being one of directly and indirectly provided on the oscillating plate, the drive circuit is one of directly and indirectly mounted on the extending portion of the oscillating plate; and a heat dissipating member provided on the extending portion in the vicinity of the drive circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A liquid delivering apparatus, comprising:
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a flow-passage unit including an opening and a pressure chamber which accommodates liquid and which communicates with the opening, the flow-passage unit including a first outer side edge and a second outer side edge opposite the first outer side edge; an oscillating plate which partially defines the pressure chamber and which includes an extending portion that initially extends from the first outer side edge of the flow-passage unit to an outside thereof so as to be away from the second outer side edge; a piezoelectric material layer which is stacked on the oscillating plate and which deforms upon application of an electric field thereto so as to oscillate the oscillating plate for delivering the liquid from the pressure chamber through the opening; an electrode pattern and a drive circuit which apply the electric field to the piezoelectric material layer, the electrode pattern being one of directly and indirectly provided on the oscillating plate while the drive circuit is one of directly and indirectly mounted on the extending portion of the oscillating plate; and an electrically insulating layer which is formed on the oscillating plate by using a ceramic material having an electrically insulating property, the drive circuit being mounted on the extending portion of the oscillating plate with the electrically insulating layer therebetween. - View Dependent Claims (21)
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22. A liquid delivering apparatus, comprising:
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a flow-passage unit including an opening and a pressure chamber which accommodates liquid and which communicates with the opening, the flow-passage unit including a first outer side edge and a second outer side edge opposite the first outer side edge; an oscillating plate which partially defines the pressure chamber and which includes an extending portion that initially extends from the first outer side edge of the flow-passage unit to an outside thereof so as to be away from the second outer side edge; a piezoelectric material layer which is stacked on the oscillating plate and which deforms upon application of an electric field thereto so as to oscillate the oscillating plate for delivering the liquid from the pressure chamber through the opening; and an electrode pattern and a drive circuit which apply the electric field to the piezoelectric material layer, wherein the liquid delivering apparatus further comprises; an electrically insulating layer superposed on the oscillating plate at both of a region of the oscillating plate overlapping the flow-passage unit and a region of the oscillating plate corresponding to the extending portion, wherein the drive circuit is mounted on the extending portion of the oscillating plate while the electrode pattern is superposed on the electrically insulating layer at both of the region of the oscillating plate overlapping the flow-passage unit and the region of the oscillating plate corresponding to the extending portion, wherein the piezoelectric material layer is superposed on the electrically insulating layer at the region of the oscillating plate overlapping the flow-passage unit, with the electrode pattern interposed between the electrically insulating layer and the piezoelectric material layer, wherein the liquid delivering apparatus further comprises; an upper electrode superposed on the piezoelectric material layer; and an upper-electrode connecting portion which is superposed on the electrically insulating layer at the region of the oscillating plate corresponding to the extending portion, for connecting the upper electrode and the drive circuit to each other, and wherein the liquid delivering apparatus is arranged such that the electric field is applied between the electrode pattern and the upper electrode.
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Specification