Patent Publication Number: US-8967771-B2

Title: Liquid ejecting head, liquid ejecting apparatus and method for manufacturing liquid ejecting head

Description:
BACKGROUND 
     1. Technical Field 
     The present invention relates to a liquid ejecting head, a liquid ejecting apparatus and a method for manufacturing a liquid ejecting head. 
     2. Related Art 
     As an example of a liquid ejecting head, an ink jet type recording head is known which discharges ink drops from nozzles by causing pressure change in ink in a pressure chamber that communicates with the nozzles. 
     In a configuration of the ink jet type recording head, a first nozzle array in which the nozzles are arranged in a constant direction and a second nozzle array in which similarly nozzles are arranged in the constant direction are arranged in a direction that is orthogonal to the constant direction so that the nozzles are placed at a higher density, and the first nozzle array and the second nozzle array are placed in a shifted manner in the constant direction (so-called staggered arrangement) (refer to JP-A-11-309877). 
     However, when the first nozzle array and the second nozzle array are placed in the constant direction in the so-called staggered arrangement as in JP-A-11-309877, a distance between the nozzles (pitch between the nozzles) in the constant direction is short so as to ensure flow path and partition wall dimensions which are required to form an individual flow path of each of the nozzles, and thus there is a limit to densification. 
     Also, when the densification is in progress after ensuring the dimensions and a margin with respect to an error during assembly of members constituting the flow path, a shape of the flow path may be complicated and, as a result, stagnation may be likely to occur in the flow of a liquid in the flow path. The stagnation may cause bubbling (reduction in bubble discharge) in the flow path, and stable liquid ejection from the nozzle may be hindered. 
     The above-described problem is present in not only the ink jet type recording head but also the liquid ejecting head that ejects a liquid other than the ink. 
     SUMMARY 
     An advantage of some aspects of the invention is to provide a liquid ejecting head that can prevent the stagnation and reduction in bubble discharge and achieve stable liquid ejection, a liquid ejecting apparatus, and a method for manufacturing the liquid ejecting head. 
     According to an aspect of the invention, a liquid ejecting head includes a pressure chamber that applies pressure to a liquid which is supplied, a nozzle that ejects the liquid to which the pressure is applied, and a communication hole that includes a first opening which communicates with the pressure chamber side at one end and a second opening which communicates with the nozzle side at the other end and has an opening area larger than an opening area of the first opening, and causes the pressure chamber and the nozzle to communicate with each other. In the communication hole, a distance between an edge of the first opening and an edge of the second opening in a first direction that is a predetermined in-plane direction of the opening area varies on one end side and the other end side in the first direction. The communication hole further includes an inclined surface that is directed to the second opening on the side where the distance between the edge of the first opening and the edge of the second opening is shorter than on the other end side in the first direction. 
     According to this configuration, the flow of the liquid in the communication hole and bubble discharge are improved by the presence of the inclined surface, and stable liquid ejection is achieved. Also, in the communication hole, the opening area of the second opening that communicates with the nozzle side is ensured to be larger than the opening area of the first opening that communicates with the pressure chamber side, and thus positioning of the communication hole and the nozzle is facilitated even when the pressure chamber and the nozzle are densified (margin with respect to an error in the positioning of the communication hole and the nozzle is ensured). 
     The inclined surface may be formed by various methods. As one of such examples, the inclined surface may be formed by a part of an adhesive that adheres the members constituting the liquid ejecting head with each other. 
     According to this configuration, the inclined surface is formed while the members constituting the liquid ejecting head are adhered with each other, and thus a configuration including the inclined surface can be achieved with ease. 
     According to the aspect of the invention, in the second opening, a width in the second direction that is orthogonal to the first direction may be set to be smaller than a width of the pressure chamber on the side where the distance between the edge of the first opening and the edge of the second opening in the first direction is shorter than on the other end side, and, in the second opening, a width in the second direction may be set to be larger than the width of the pressure chamber on the side where the distance between the edge of the first opening and the edge of the second opening in the second direction is longer than on the other end side. 
     According to this configuration, the second opening has a portion that has the width which is smaller than the width of the pressure chamber in the second direction and a portion that has the width which is larger than the width of the pressure chamber in the second direction, and thus contributes greatly to the densification of the pressure chamber and the nozzle. 
     Specifically, the liquid ejecting head may further include a nozzle plate in which a first nozzle array where a plurality of the nozzles are formed in the second direction and a second nozzle array where a plurality of the nozzles are formed in the second direction are arranged in the first direction and the nozzles of the first nozzle array and the nozzles of the second nozzle array are formed at positions different in the second direction, and a flow path member that includes a plurality of the pressure chambers which are arranged in the second direction and a plurality of the communication holes that cause the respective pressure chambers to communicate one-to-one with the respective nozzles. In the second opening of each of the plurality of the communication holes, portions of the second opening that have the width larger than the width of the pressure chamber which is placed in the first direction may be alternately placed at different positions in the second direction with respect to the first opening, and may communicate alternately with the nozzles of the first nozzle array and the nozzles of the second nozzle array in the second direction. 
     According to this configuration, the second openings of the communication holes are alternately disposed at the positions different in the first direction, and thus the communication holes can be placed at narrow intervals in the second direction so as to contribute to the densification of the nozzle in the second direction and reduction in size of the head. 
     The technical idea according to the invention may be embodied by various forms not limited to the liquid ejecting head. For example, an apparatus (liquid ejecting apparatus) mounted with the liquid ejecting head can be regarded as one invention, and a part of the configuration of the liquid ejecting head (for example, the flow path member including the communication hole) can be regarded as one invention. Also, a method for manufacturing the above-described liquid ejecting head can be regarded as one invention. For example, a method for manufacturing a liquid ejecting head including a flow path member that includes a liquid flow path which has a first opening and a second opening which is on a side opposite to the first opening and has an opening area larger than an opening area of the first opening, an adhesion member that is adhered to the second opening side of the flow path member, and a nozzle that ejects a liquid includes applying or attaching an adhesive to at least one of a surface of the flow path member on the adhesion member side and a surface of the adhesion member on the flow path member side, and forming an inclined surface that is directed from a wall surface of the flow path to the second opening by causing a part of the adhesive to enter the flow path from the second opening on a side where a distance between an edge of the first opening and an edge of the second opening is shorter than on the other end side in the first direction which is parallel with an opening surface of the second opening by adhering the flow path member and the adhesion member with each other and by using the adhesive that enters the flow path. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
         FIG. 1  is an exploded perspective view illustrating a part of a main configuration of a liquid ejecting head. 
         FIG. 2  is a cross-sectional view showing a cross section through a nozzle of a first nozzle array. 
         FIG. 3  is a cross-sectional view showing a cross section through a nozzle of a second nozzle array. 
         FIG. 4  is a view illustrating a part of a plurality of pressure chambers and the like. 
         FIG. 5  is a perspective view illustrating a communication hole that has an inclined surface therein. 
         FIG. 6  is a view illustrating a part of a method for manufacturing the liquid ejecting head. 
         FIG. 7  is a view illustrating the vicinity of a plurality of second openings in a state where an adhesion sheet is attached to a target surface. 
         FIG. 8  is a schematic view showing an example of an ink jet printer. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, embodiments of the invention will be described referring to the accompanying drawings. 
       FIG. 1  is an exploded perspective view illustrating a part of a main configuration of a liquid ejecting head  10  according to this embodiment. Herein, an ink jet type recording head that ejects (discharges) ink is described as the liquid ejecting head  10 . The liquid ejecting head  10  is configured to include each of the following members of a vibrating plate  20 , a flow path substrate  30 , a sealing plate  40 , a reservoir plate  50 , and a nozzle plate  60 . The flow path substrate  30  corresponds to an example of a flow path member according to an aspect of the invention. These members may be individually formed and stacked or these members (or some of these members) may be integrally formed. Also, the liquid ejecting head  10  may be configured to include a member other than the members shown in  FIG. 1  or may be configured not to include some of the members shown in  FIG. 1 . 
     The vibrating plate  20  seals one surface of the flow path substrate  30 , and is mounted with a piezoelectric element  70  (refer to  FIGS. 2 and 3 ) on a surface on the side opposite to a surface in contact with the flow path substrate  30 . The vibrating plate  20  is formed of ceramics or the like or the vibrating plate  20  has, for example, an elastic film formed of an oxide film which is in contact with the flow path substrate  30  and an insulator film which is formed from an oxide film using a different material than the elastic film and is stacked on the elastic film. In the invention, objects being “in contact” with each other means both of a state where an adhesive or the like is interposed between the objects and a state where nothing is interposed between the objects. 
     The flow path substrate  30  has a plurality of liquid flow paths  31 . The flow paths  31  are arranged in a second direction that is orthogonal to a first direction which is parallel with a longitudinal direction thereof. A partition wall  35  is disposed between the flow path  31  and the flow path  31 . In this specification, directions, positions and the like of the components of the liquid ejecting head  10  being expressed to be, for example, parallel, orthogonal, or identical to each other means not only that these are strictly parallel, orthogonal, or identical to each other but also that these are with a tolerance acceptable for product performance and a tolerance acceptable in product manufacturing. 
     Each of the flow paths  31  is configured to have a supply hole  32 , a pressure chamber  33 , and a communication hole  34 . The pressure chamber  33  is open on the one surface of the flow path substrate  30 , and the supply hole  32  and the communication hole  34  are open on the other surface of the flow path substrate  30 . The supply hole  32  communicates with the pressure chamber  33  in the vicinity of one longitudinal direction end side of the pressure chamber  33 . The communication hole  34  communicates with the pressure chamber  33  in the vicinity of the other longitudinal direction end side of the pressure chamber  33 . 
     The nozzle plate  60  has a plurality of nozzles  61  as through-holes through which the ink is ejected. In the example of  FIG. 1 , the nozzle plate  60  has a first nozzle array  62  where the plurality of nozzles  61  are formed at predetermined intervals along the second direction, and a second nozzle array  63  where the plurality of nozzles  61  are formed at the predetermined intervals along the second direction. The first nozzle array  62  and the second nozzle array  63  are arranged in the first direction. Also, the nozzles  61  of the first nozzle array  62  and the nozzles  61  of the second nozzle array  63  are placed at positions shifted in the second direction (so-called staggered arrangement). In a case where the first nozzle array  62  and the second nozzle array  63  are collectively considered as one nozzle group (nozzle group of the liquid ejecting head  10 ), a nozzle pitch P (distance between the nozzles in the second direction) of the nozzle group is half of the predetermined interval. 
     Each of the communication holes  34  of the respective flow paths  31  causes each of the pressure chambers  33  and each of the nozzles  61  to communicate one-to-one with each other. In the example of  FIG. 1 , the sealing plate  40  and the reservoir plate  50  are interposed between the other surface of the flow path substrate  30  and the nozzle plate  60 . One surface of the sealing plate  40  is in contact with the other surface of the flow path substrate  30 . One surface of the reservoir plate  50  is in contact with the other surface of the sealing plate  40 . Also, the other surface of the reservoir plate  50  is in contact with the surface of the nozzle plate  60  on the side opposite to a surface thereof which is exposed to the outside (nozzle opening surface). Each of the flow path substrate  30 , sealing plate  40 , reservoir plate  50 , and nozzle plate  60  is formed of, for example, ceramics, a silicon single crystal substrate, and stainless steel. 
     The reservoir plate  50  has a plurality of second communication holes  51  and a reservoir  52 . The reservoir  52  is referred to as a common ink chamber. Both of the second communication holes  51  and the reservoir  52  penetrate the reservoir plate  50 . Each of the second communication holes  51  is placed at a position corresponding one-to-one to each of the nozzles  61 . The length of the reservoir  52  in the second direction is ensured in such a manner as to substantially correspond to the length of the nozzle group in the second direction. The sealing plate  40  has a plurality of first communication holes  41  and a common supply hole  42 . Both of the first communication holes  41  and the common supply hole  42  penetrate the sealing plate  40 . Each of the first communication holes  41  is placed at a position corresponding one-to-one to each of the nozzles  61  as is the case with each of the second communication holes  51 . Also, each of the first communication holes  41  communicates one-to-one with each of the communication holes  34 . The length of the common supply hole  42  in the second direction is ensured in such a manner as to substantially correspond to the length of the nozzle group in the second direction as is the case with the reservoir  52 . Also, the common supply hole  42  communicates with each of the supply holes  32  of the respective flow paths  31 . (Excluding an ink supply path from the outside that will be described later,) the reservoir  52  is sealed by the nozzle plate  60  on a side in contact with the nozzle plate  60 , and is sealed by the sealing plate  40  on a side in contact with the sealing plate excluding a portion which corresponds to the common supply hole  42 . 
       FIG. 2  shows a cross section taken along line II-II′ of the liquid ejecting head  10  shown in  FIG. 1  from a point of view facing the second direction. The cross section shown in  FIG. 2  is a cross section through the nozzles  61  of the first nozzle array  62 . 
       FIG. 3  shows a cross section taken along line III-III′ of the liquid ejecting head  10  shown in  FIG. 1  from a point of view facing the second direction. The cross section shown in  FIG. 3  is a cross section through the nozzles  61  of the second nozzle array  63 . 
     As shown in  FIGS. 2 and 3 , the pressure chamber  33  communicates with the nozzles  61  via the communication holes  34 , first communication holes  41 , and the second communication holes  51 . The communication hole  34  that is shown in  FIG. 2  causes the pressure chamber  33  to communicate with the nozzle  61  of the first nozzle array  62 , and the communication hole  34  that is shown in  FIG. 3  causes the pressure chamber  33  to communicate with the nozzle  61  of the second nozzle array  63 . Hereinafter, the nozzle  61  of the first nozzle array  62  may be referred to as a nozzle  61 A, the nozzle  61  of the second nozzle array  63  may be referred to as a nozzle  61 B, the communication hole  34  that causes the pressure chamber  33  to communicate with the nozzle  61 A may be referred to as a communication hole  34 A, and the communication hole  34  that causes the pressure chamber  33  to communicate with the nozzle  61 B may be referred to as a communication hole  34 B to allow for the difference. 
     The piezoelectric element  70  is mounted on the surface of the vibrating plate  20  on the side opposite to the surface in contact with the flow path substrate  30 . As is known, the piezoelectric element  70  is disposed on each of the pressure chambers  33  to correspond to positions of the pressure chambers  33 . An individual electrode and a common electrode, which are not shown herein, are connected to the piezoelectric element  70 , and the piezoelectric element  70  is deformed when voltage supplied from the circuit substrate  100  which drives the liquid ejecting head  10  is applied via cables (flexible substrate or the like)  90  to the electrodes. The vibrating plate  20  on which the piezoelectric element  70  and each of the above-described electrodes are mounted and the flow path substrate  30  can be collectively referred to as an actuator substrate  11 . 
     The ink is supplied from the outside to the reservoir  52  via the ink supply path that is not shown herein. The ink that is supplied to the reservoir  52  passes through the common supply hole  42  and is supplied to each of the pressure chambers  33  from each of the supply holes  32 . The above-described deformation of the piezoelectric element  70  causes the vibrating plate  20  to be bent and pressure in the pressure chamber  33  to increase. The ink in the pressure chamber  33  is ejected from the nozzles  61  in response to the increase in the pressure. 
     As shown in  FIGS. 2 and 3 , the communication hole  34  has a first opening  34   a  that communicates with a pressure chamber  33  side at one end, and a second opening  34   b  that communicates with a nozzle  61  side at the other end. In this embodiment, the opening area of the second opening  34   b  is ensured to be larger than the opening area of the first opening  34   a . In this embodiment, an in-plane direction that constitutes the opening areas includes the first direction. 
       FIG. 4  illustrates a part of the plurality of pressure chambers  33  and the like from a point of view from a vibrating plate  20  side. In  FIG. 4 , the pressure chamber  33  and the first opening  34   a  are shown with a solid line, and the second opening  34   b  is shown with a chain line. Also, for reference, the first communication hole  41 , the second communication hole  51 , and the nozzle  61  that communicate with the second opening  34   b  are also shown with a chain line. It can be known also in  FIG. 4  that the second opening  34   b  is formed to be larger than the first opening  34   a . The first openings  34   a  are placed in such a manner as to have the same positions in the first direction. Also, in each of the communication holes  34 , a distance between an edge of the first opening  34   a  and an edge of the second opening  34   b  in the first direction that is parallel with opening surfaces of the first opening  34   a  and the second opening  34   b  varies on one end side and the other end side in the first direction. Specifically, in the communication hole  34 B, the distance between the edge of the first opening  34   a  and the edge of the second opening  34   b  on the one end side is short (almost zero in the example of  FIG. 4 ), and the distance between the edge of the first opening  34   a  and the edge of the second opening  34   b  on the other end side is long. In contrast, in the communication hole  34 A, the distance between the edge of the first opening  34   a  and the edge of the second opening  34   b  on the other end side is short (almost zero in the example of  FIG. 4 ), and the distance between the edge of the first opening  34   a  and the edge of the second opening  34   b  on the one end side is long. 
     Further, the second opening  34   b  of each of the communication holes  34  has a width L 1  that is smaller than a width L 0  of the pressure chamber  33  in the second direction on the side where the distance between the edge of the first opening  34   a  and the edge of the second opening  34   b  in the first direction is short, and has a width L 2  that is larger than the width L 0  of the pressure chamber  33  in the second direction on the side where the distance between the edge of the first opening  34   a  and the edge of the second opening  34   b  in the first direction is long. Further, portions of the second openings  34   b  of the communication holes  34  that have the width which is larger than the width of the pressure chamber  33  are placed alternately along the second direction at different positions with respect to the first openings  34   a  in the first direction. This means that the communication holes  34 A and the communication holes  34 B are placed alternately in the second direction in a shape that is symmetrical with a line in the second direction which passes through centers of the first openings  34   a.    
     When the above-described shape and placement of the communication holes  34  are adopted, the communication holes (communication hole  34 A and communication hole  34 B) associated with the adjacent pressure chambers  33  do not interfere with each other, and thus the pressure chambers  33  can be placed at a high density in the second direction and the nozzles  61  can be placed at a high density in the second direction (the nozzle pitch P can be narrower). Also, even when the pressure chambers  33  are placed at a high density, the second opening  34   b  of the communication hole  34  has the portion wider than the pressure chamber  33  (refer to L 2  of  FIG. 4 ), and thus positioning of the nozzle  61  (furthermore, the first communication hole  41  and the second communication hole  51 ) and the communication hole  34  can be facilitated. 
     As is shown from the above description and  FIGS. 2 to 4 , the second opening  34   b  of the communication hole  34  communicates with the nozzle  61  side at the portion that is wider than the pressure chamber  33 . This configuration, in other words, means that a partial range of the second opening  34   b  (range including the portion that is narrower (refer to L 1  of  FIG. 4 ) than the pressure chamber  33 ) is blocked by a member (sealing plate  40  in the example of  FIGS. 1 to 3 ) that is in contact with a surface of the flow path substrate  30  on a side where the second opening  34   b  is open. In the partial range that is blocked by the member which is in contact with the surface on the side where the second opening  34   b  is open in this manner, a step portion is formed by the contact member and a wall surface of the communication hole  34 . The step portion may cause stagnation of the flow of the ink and bubbling (reduction in bubble discharge) in the flow path and may hinder stable liquid ejection from the nozzle  61 . As such, in this embodiment, the communication hole  34  has an inclined surface  81  (refer to  FIGS. 2 and 3 ) toward the second opening on the side where the distance between the edge of the first opening  34   a  and the edge of the second opening  34   b  in the first direction is short so as to eliminate the presence of the step portion to the maximum extent possible. 
       FIG. 5  is a perspective illustration of the communication hole  34  that has the inclined surface  81  on the wall surface therein. In  FIG. 5 , the wall surface (side surface) of the hole of the communication hole  34  is shown with a chain line, and the inclined surface  81  is shown with a solid line. Also,  FIG. 5  shows the communication hole  34  that does not have the inclined surface  81  on the wall surface (side surface) therein as a comparative example of this embodiment. A range of the comparative example that is shown with sign D is the above-described partial range of the second opening  34   b , and the step portion is formed in this range between the wall surface (side surface) of the communication hole  34  and the surface of the sealing plate which is adhered. According to  FIG. 5 , the inclined surface  81  that is inclined from the wall surface (side surface) is formed at a position corresponding to the step portion in such a manner that the step portion is buried, and thus the presence of the step portion is substantially eliminated. In this embodiment, the inclined surface  81  is not only a surface inclined with respect to a normal direction but also an inclined surface that is inclined with respect to the wall surface (side surface) which is adjacent to the edge of the first opening  34   a . The flow of the ink in the communication hole  34  is improved by the presence of the inclined surface  81 , and the bubbling in the communication hole  34  is also prevented. As a result, the bubble discharge out of the nozzle  61  is improved, and the liquid ejection from the nozzle  61  becomes more stable than in the related art. 
     The inclined surface  81  may be formed by various methods. In this embodiment, as one of such examples, the inclined surface  81  is formed by a part of an adhesive that adheres the members constituting the liquid ejecting head  10  with each other. Specifically, the inclined surface  81  is formed by a part of a layer (adhesion layer  80 ) of the adhesive that adheres the surface of the flow path substrate  30  on the side where the second opening  34   b  is open with the member (sealing plate  40  in the example of  FIGS. 1 to 3 ) which is in contact with the surface. However, at least a part of the inclined surface  81  may be formed by a material other than the adhesive and the member. Also, the wall surface (side surface) of the communication hole  34  itself may be formed in the flow path substrate  30  with a shape that has the inclined surface  81  which is inclined with respect to the normal direction. 
     Hereinafter, a method used in a case where the inclined surface  81  is formed by a part of the adhesion layer  80  will be described. 
       FIG. 6  illustrates each of processes through which the inclined surface  81  is formed, which are included in a method for manufacturing the liquid ejecting head  10 , by using the same cross section as in  FIG. 2 . The upper section of  FIG. 6  shows applying or attaching the adhesive to the surface (hereinafter, target surface) of the flow path substrate  30  on the side where the second opening  34   b  is open. Specifically, a sheet-like thermo-compression adhesive (adhesion sheet) is attached to the target surface. The adhesion sheet is an example of the adhesion layer  80 . 
       FIG. 7  illustrates the vicinity of the plurality of second openings  34   b  in a state where the adhesion sheet ( 80 ) is attached to the target surface. A substantially circular hole  82  that corresponds to the position of each of the second openings  34   b  is formed in advance through hollowing out on the adhesion sheet ( 80 ). The adhesion sheet ( 80 ) is attached in such a manner that each of the holes  82  surrounds an outer side of the portion of each of the second openings  34   b  which is wider than the pressure chamber  33 . However, the adhesion sheet ( 80 ) does not completely surround the outer side of each of the second openings  34   b  with each of the holes  82 , but a partial range of each of the second openings  34   b  is covered by the adhesion sheet ( 80 ). The range shown with an oblique line in  FIG. 7  is the range of each of the second openings  34   b  that is covered by the adhesion sheet ( 80 ). 
     After the adhesion sheet ( 80 ) is attached to the target surface as described above, the actuator substrate  11  is placed in such a manner that the target surface is directed to a vertical direction upper side as shown in the lower section of  FIG. 6 , the member (the member that is in contact with the target surface is referred to as an adhesion member: sealing plate  40  in the example of  FIGS. 1 to 3  and  6 ) that is contact with the target surface is pressed against the adhesion sheet ( 80 ), and heat is applied to the adhesion sheet ( 80 ). In this manner, the target surface and the adhesion member are thermo-compressed. In this case, the portion covering the range shown with the oblique line in  FIG. 7  that is a part of the adhesion sheet ( 80 ) which is temporarily softened by the heat enters the flow path (communication hole  34 ) from the second opening  34   b  for the pressure caused by the pressing of the adhesion member and gravity. The portion of the adhesion sheet ( 80 ) that enters the flow path is cooled and cured while moving along the wall surface corresponding to the portion of the communication hole  34  which is narrower than the pressure chamber  33 . As a result, as shown in the lower section of  FIG. 6  and  FIGS. 2 ,  3 , and  5 , the inclined surface  81  that has a shape directed from the wall surface of the communication hole  34  to the second opening  34   b  is shaped by the adhesive which is hardened. In a case where the adhesive is not a thermo-compression adhesive, the heat may not be applied but the adhesion is performed by a method corresponding thereto. 
     A timing when the actuator substrate  11  is placed in such a manner that the target surface is directed to the vertical direction upper side may be earlier than a timing of attaching the adhesion sheet ( 80 ) to the target surface. Also, the adhesion sheet ( 80 ) may not be attached to the target surface but may be attached a surface (hereinafter, second target surface) of the adhesion member (sealing plate  40  in the example of  FIGS. 1 to 3  and  6 ) in contact with the target surface on a flow path substrate  30  side. Further, the adhesion sheet ( 80 ) may be attached to both of the target surface and the second target surface. Even in this case, it is preferable that the adhesion be performed by placing the actuator substrate  11  in such a manner that the target surface is directed to the vertical direction upper side. Then, the reservoir plate  50  and the nozzle plate  60  are mounted, and connected to the circuit substrate  100  or the like so that the liquid ejecting head  10  is manufactured. According to the manufacturing method, the inclined surface  81  can be easily formed by the originally required material of the adhesive. 
     Other Embodiments 
     The invention is not limited to the above-described embodiment, but various modifications are possible without departing from the scope of the invention. For example, the following embodiments are also possible. 
     The liquid ejecting head  10  does not necessarily have to include the sealing plate  40  and the reservoir plate  50 , but may include another plate such as a so-called compliance plate. Further, the liquid ejecting head  10  may be configured to include a plurality of these plates or may be configured to include a single plate which has functions of the plurality of plates. Also, the nozzle plate  60  and the so-called compliance plate may be adhered to the target surface. In this case, for example, a configuration in which the flow path substrate  30  has a part of the reservoir which supplies the ink to each of the pressure chambers  33  may be adopted. 
     Also, pressure generation means for generating a change in the pressure in the pressure chamber  33  is not limited to the thin film type piezoelectric element shown in  FIGS. 2 ,  3 , and  6  but, for example, a stacked type piezoelectric actuator in which a piezoelectric material and an electrode material are alternately stacked or longitudinal vibration type pressure generation means that applies a change in pressure to each of the pressure chambers  33  through longitudinal vibration may be adopted. Also, one in which a heating element is placed in a pressure chamber and ejects droplets from a nozzle by using bubbles generated by heat generation of the heating element or such as a so-called electrostatic actuator that generates static electricity between a vibrating plate and an electrode, deforms the vibrating plate by using the static electricity, and ejects droplets from a nozzle can be used as the pressure generation means. 
     Also, the liquid ejecting head  10  constitutes a part of an ink jet type recording head unit that includes an ink supply path which communicates with an ink cartridge or the like, and is mounted on an ink jet printer  200 . The ink jet printer  200  is an example of a liquid ejecting apparatus. 
       FIG. 8  is a schematic view showing an example of the ink jet printer  200 . Sign  1  in  FIG. 8  shows a part of a housing (head cover) that accommodates the liquid ejecting head  10  while exposing a nozzle opening surface thereof to the outside. In the ink jet printer  200 , ink cartridges  202 A and  202 B or the like are removably disposed in the ink jet type recording head unit (hereinafter, head unit  202 ) which includes a plurality of the liquid ejecting heads  10 . A carriage  203  on which the head unit  202  is mounted is disposed in an axially movable manner in a carriage shaft  205  mounted on an apparatus main body  204 . When a driving force of a drive motor  206  is transmitted to the carriage  203  via a plurality of gears, which are not shown herein, and a timing belt  207 , the carriage  203  moves along the carriage shaft  205 . 
     A platen  208  is disposed along the carriage shaft  205  in the apparatus main body  204 , and a printing medium S that is supplied by a roller or the like, which is not shown herein, is transported on the platen  208 . The ink is ejected from the nozzle  61  of the liquid ejecting head  10  onto the printing medium S that is transported so that any image is printed onto the printing medium S. The ink jet printer  200  may be a so-called line head type printer in which not only the head unit  202  is moved as described above but also, for example, printing is performed by moving only the printing medium S with the liquid ejecting head  10  being fixed. 
     Also, the invention can also be applied to a liquid ejecting head and a liquid ejecting apparatus ejecting a liquid other than ink. Examples of the liquid ejecting head include a color material ejecting head that is used for manufacturing a color filter of a liquid crystal display or the like, an electrode material ejecting head that is used for forming an electrode of an organic EL display or a field emission display (FED), and a bio-organic material ejecting head that is used for biochip manufacturing. The invention can also be applied to a liquid ejecting apparatus on which the liquid ejecting head is mounted. 
     The entire disclosure of Japanese Patent Application No. 2013-018383, filed Feb. 1, 2013 is incorporated by reference herein.