JP2006159513A - Liquid discharging head, and protective tape for the head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a protective tape from being peeled from a liquid discharging head in the distribution process of the liquid discharging head, and also, to prevent the liquid discharging head from being broken even when the protective tape is peeled at the time of an actual use. <P>SOLUTION: This protective tape 14 is bonded in such a manner that the longitudinal direction may become a direction which crosses the extending direction of a train of respective discharging ports 11. Thus, the protective tape 14 is bonded in a manner to avoid a second sealing agent 4. In details, the width of the protective tape 14 is determined to be not less than the length of the discharging port 11 train, and also, not more than the interval of the second sealing agent 4 being formed on both ends of the discharging surface. Then, the protective tape 14 having the width is pasted only on the internal side of the second sealing agent 4 so that the protective tape 14 does run over the second sealing agent 4 on both ends. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a liquid discharge head and a protective tape, and more particularly to a protective tape that is bonded to protect a discharge port and its peripheral edge during distribution of a liquid discharge head that discharges liquid such as ink. It is.

  The liquid discharge head of the present invention is a facsimile machine having a printer, a copier, and a communication system for recording on a recording medium such as paper, thread, fiber, fabric, leather, metal, plastic, glass, wood, ceramics. Further, it is used in a device such as a word processor having a printer unit, and an industrial recording device combined with various processing devices. [Recording] in the present invention means not only giving an image having a meaning such as a character or a figure to a recording medium but also giving an image having no meaning such as a pattern.

  Since the discharge port of the liquid discharge head discharges liquid such as ink when the liquid discharge head is used, the discharge port is open to the atmosphere. On the other hand, when not in use, capping is performed on the surface on which the discharge ports of the liquid discharge head are arranged to prevent evaporation of the ink solvent through the discharge ports to prevent clogging of the discharge ports and contact with others. To prevent damage.

  In this way, when the liquid discharge head is mounted on an apparatus such as a printer, the liquid discharge head can be protected by capping, but when the liquid discharge head is not mounted on the apparatus, particularly in the process of logistics. In some cases, it is necessary to prevent the evaporation of the ink solvent by another means, and to prevent the discharge port arrangement surface (hereinafter also referred to as the discharge surface) from coming into contact with the other.

  As a conventional example for this purpose, those described in Patent Documents 1 and 2 are known. These documents describe a head protection member that abuts the sheet member on the ejection surface and generates a contact pressure when the holder that holds the sheet member engages the liquid ejection head. Yes. The head protection member is configured to be detachable from the liquid discharge head. Basically, when the head protection member is mounted, a part of the protection member is engaged with the liquid discharge head as described above, so that the contact of the sheet member is achieved. The contact pressure is generated.

  In Patent Document 3, as other head protection members, a head protection tape using an adhesive and a head protection tape using a thermoplastic resin are known. These protective tapes are bonded to the discharge surface of the liquid discharge head and the periphery thereof to protect the discharge ports and the like by their adhesive strength and thermoplastic resin characteristics. Such a tape-shaped head protection member has advantages such as a simple structure compared to the protection members described in Patent Documents 1 and 2 described above.

Japanese Patent No. 2810472 JP-A-3-248849 Japanese Patent Laid-Open No. 6-91886

  However, protective tapes using adhesives and thermoplastics are basically joined by adhesiveness or thermoplasticity, so the strength and ease of peeling differ depending on the shape and material of the parts to which they are joined. There is a problem due to this. This problem will be described in relation to the structure of the liquid discharge head.

  4 and 6 (a) and 6 (b) show a typical liquid discharge head, FIG. 4 is a perspective view of the discharge surface as seen from below the liquid discharge head, and FIGS. 6 (a) and 6 (b) are views. FIG. 7 is a view showing a cross section taken along line AA and line BB in FIG. 4, and FIG. 7 is a view showing a state in which the protective tape is joined to the liquid discharge head in the same cross section as FIG.

  As shown in FIG. 7, the conventional protective tape is attached to the liquid discharge head so as to be bonded to the surface of the water repellent layer 12 and the sealant 4 that form the discharge surface. The water-repellent layer 12 has a relatively high water repellency so as to prevent ink droplets and water droplets from adhering to the ejection port and its surroundings. Further, the sealing agent 4 is a thermosonic pressure bonding in which an electrical wiring between a liquid discharge head chip and an electrical wiring member (hereinafter also referred to as TAB) 6 has a TAB electrode terminal 7 disposed on an electrode portion 8 of the head chip. Since it is formed by connecting by the method, it is formed higher than the ejection surface of the head chip. Of course, the sealant is made of a material different from that of the discharge surface or its water-repellent layer.

  As described above, the conventional protective tape has a problem that the shape and material of the part to which it is joined are different, and as a result, it is easily peeled off. For example, in the case of a protective tape of an adhesive, uneven distribution of the bonding force of the protective tape may occur due to the raised shape of the sealant, and the protective tape may eventually peel off from the discharge surface in the physical distribution process.

  In order to prevent the protective tape from being easily peeled off, if a protective tape that has a bonding strength that does not peel off at the discharge surface near the sealant that is most likely to peel off is used, it adheres to the periphery of the discharge surface such as on the sealant. In some cases, an agent or a thermoplastic resin may remain, and the protective tape may break the liquid discharge head without peeling off from the discharge surface. When the adhesive remains in the peripheral portion of the ejection surface, the remaining adhesive may move to the ejection port and cause the ejection port to be clogged due to a recovery operation after the head is mounted on the main body.

  The present invention has been made to solve the above-described conventional problems, and the object of the present invention is not to peel off from the liquid discharge head in the physical distribution process, but to affect the head even if it is peeled off during actual use. It is an object of the present invention to provide a liquid discharge head to which a protective tape having no adhesive is bonded, and a protective tape thereof.

  Therefore, in the present invention, in a liquid discharge head having a discharge surface provided with a discharge port for discharging a liquid and a convex portion protruding higher than the discharge surface, the substrate has a base material and a bonding layer, A protective tape that is attached to a liquid discharge head and protects the head, the protective tape being bonded to the discharge surface including the discharge port and not having the bonding layer bonded to the convex portion. It is characterized by that.

  The head is attached to a liquid discharge head having a base and a bonding layer and having a discharge surface provided with a discharge port for discharging a liquid and a convex portion protruding higher than the discharge surface. In the protective tape for protecting the liquid, the width of the protective tape is shorter than the length of the discharge surface in the direction of the discharge port array.

  In another embodiment, the substrate is bonded to a liquid discharge head having a base material and a bonding layer, and having a discharge surface provided with a discharge port for discharging liquid and a convex portion protruding higher than the discharge surface. In the protective tape for protecting the head, a hole is formed in the protective tape at a location corresponding to the convex portion.

  In yet another embodiment, the substrate is bonded to a liquid discharge head having a base and a bonding layer, and having a discharge surface provided with a discharge port for discharging liquid and a convex portion protruding higher than the discharge surface. In the protective tape for protecting the head, a concave portion is formed in the protective tape at a location corresponding to the convex portion.

  According to the above configuration, when the protective tape is applied to the liquid discharge head, the protective tape is bonded to the discharge surface including the discharge port, and the bonding layer is bonded to the convex portion such as the sealing agent connected to the discharge surface. It is pasted as if not. For example, the width of the protective tape is determined so as to avoid the convex portion, or a hole or a concave portion is formed at a position corresponding to the convex portion of the protective tape so that the protective tape bonding layer is not bonded to the convex portion. be able to. As a result, the protective tape can prevent the bonding force from becoming non-uniform or different from the material to be bonded when applied to the head, and can prevent the protective tape from peeling off during distribution. Become.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A liquid discharge head according to an embodiment of the present invention will be described based on typical head shapes described in FIGS. 4 and 6 with respect to portions other than the protective tape. In addition, the protective tape portion, which is a component of the liquid discharge head of the present invention, will be described with reference to FIG.

4. Description of Head Portion As shown in FIG. 4, the liquid discharge head 9 of the present embodiment is in the form of a holder to which an ink tank is mounted, and a liquid discharge head in the form of a chip (hereinafter also simply referred to as a head) on the bottom surface of the holder. ) Is provided. In this head, an array of ejection ports 11 is formed on a substrate, and a first sealing agent 3 and a second sealing agent 4 are disposed around the substrate. In addition, an electrical wiring member (TAB) for electrical connection between the head and the main body is provided from the bottom surface to the side surface of the holder, and the connection portion between the TAB and the electrode on the substrate is the second sealing. Sealed with the agent 4.

  As shown in FIGS. 6A and 6B, the silicon (Si) substrate 5 has three ink supply ports 15 for cyan, magenta, and yellow ink formed in parallel (FIG. 6). (B)) A plurality of electrothermal conversion elements are arranged on the substrates 5 on both sides of each ink supply port 15, and ejection ports 11 corresponding to these electrothermal conversion elements are formed. Yes. Specifically, on the substrate 5, a structure made of a resin material in which an electrothermal conversion element and its wiring pattern, an ink flow path 13 corresponding to the electrothermal conversion element and an ejection port 11 are formed is formed by a photolithography technique. ing. A water repellent layer 12 is formed on these structures except for the opening portion of the discharge port 11, and this water repellent layer 12 forms the outermost surface of the discharge surface. . In addition, electrical wiring, electrode portions 8 and the like are formed on the substrate 5. In the present embodiment, the array of electrode portions 8 is arranged on both sides in the array direction of the discharge ports on the surface on which the discharge ports are arranged (hereinafter also referred to as discharge surface), which is arranged in the direction perpendicular to the 11 rows of discharge ports. Yes. When a plurality of ink supply ports 15 are formed as in the present embodiment, the length from each ink supply port 15 to the electrode portion 8 is almost equal, so that the design considering electric wiring resistance is easy.

  The TAB 6 forms an electric signal path for supplying an electric signal to the electrode wiring on the substrate 5, and an opening for incorporating the substrate 5 is formed. Near the edge of the opening, an electrode terminal 7 connected to the electrode portion 8 of the chip is formed. The chip and TAB 6 are bonded to an ink supply holding member 10 formed by resin molding. The electrical connection portion between the substrate 5 and the TAB 6 seals the first sealant 3 that seals the portion below the electrical connection portion and where the chip electrode is not formed, and the upper portion of the electrical connection portion. Sealing is performed with the second sealant 4 to protect the electrical connection portion from ink corrosion and external impact.

  Several embodiments of the protective tape used by being bonded to the liquid discharge head described above will be described below.

Description of the protective tape portion which is a component of the head (Embodiment 1)
FIGS. 1A and 1B are views showing a state in which the protective tape 14 is joined to the head shown in FIGS. 4 and 6, and FIG. 1A is a front view of the ejection surface of the present embodiment. FIG. 2B is a cross-sectional view taken along line AA of FIG.
FIG. 8 is a diagram showing a layer configuration of the protective tape 14 according to the first embodiment of the present invention. As shown in FIG. 8, the substrate 1 of the protective tape 14 is a PET film having a thickness of 12 μm, and the adhesive 2 as the bonding layer is an acrylic adhesive. The protective tape 14 is configured by applying the pressure-sensitive adhesive 2 on the substrate 1 so as to have a thickness of 30 μm.

  As shown in these drawings, the protective tape 14 is bonded so that the longitudinal direction thereof intersects the direction in which the rows of the respective discharge ports 11 extend, whereby the protective tape 14 is bonded to the second tape. Bonding is performed so as to avoid the sealant 4. Specifically, the width of the protective tape 14 is determined to be equal to or greater than the length of the 11 rows of ejection openings and equal to or smaller than the interval between the second sealing agents 4 formed at both ends of the ejection surface. And the protective tape 14 which has this width | variety is bonded only to the inner side so that it may not run over the 2nd sealing agent 4 of both ends. FIG. 5 is a perspective view showing a state where the protective tape 14 is attached to the head.

  In this bonded state, an accelerated test was performed to reproduce the environment until the package was opened under the general consumer, and when the protective tape was bonded, the protective tape was not peeled off from the discharge surface. It was.

  When the protective tape 14 is peeled off when using the head, the ink may ooze out from the ejection port 11. In order to minimize the influence due to the color mixing of the ink that oozes out, a configuration is adopted in which 11 rows of thinner ink ejection ports are arranged on the side where the protective tape 14 starts to be peeled, and darker ink is placed as it is peeled off. It is desirable. Specifically, it is desirable to dispose yellow, magenta, and cyan discharge ports in this order from the peeling start side. As a result, even if the yellow ink oozes due to the peeling of the protective tape 14 or a slight amount of yellow oozing out in the magenta ink portion of the next ink supply port 15 is mixed, it is more effective for recording as compared with the reverse color arrangement. The influence can be reduced. The same can be said even if some magenta ink that oozes out to the cyan ink portion is mixed.

  FIGS. 3A and 3B are views showing another form of the liquid discharge head according to the present embodiment and a protective tape bonded thereto, and FIG. 3A shows a row of the discharge ports 11. It is the figure which looked at the discharge surface made from the front, and the figure (b) is an AA line sectional view in the figure (a).

  As shown in these drawings, the protective tape of this embodiment is joined to the head so that the rows of the discharge ports 11 and the extending direction of the second sealant 4 are parallel and do not contact the sealant 4. The That is, the protective tape of this embodiment is determined so that the width is equal to or larger than the width including all the 11 rows of the ejection ports and equal to or smaller than the interval between the second sealing agents 4 formed at both ends of the ejection surface. The protective tape 14 having this width is attached only to the inner side of the head 9 so that it does not run over the second row of sealants 4 formed at both ends of the ejection surface, thereby completing the liquid ejection head 9 in a physical distribution state. It was.

  In this state, an acceleration test was conducted so as to reproduce the environment until the package was opened by a general consumer, and the state of the protective tape was confirmed. As a result, the protective tape from the water repellent layer 12 constituting the ejection surface was confirmed. No peeling was observed, and the same effect as above was obtained.

  According to this embodiment, the electrothermal conversion element disposed on both sides of the ink supply port 15, such as when one type of ink discharge port (and hence one supply port 15) is formed on one discharge surface. To the electrode portion 8 on the outer periphery of the discharge surface can be set to be the same on both sides of the supply port, and wiring design is facilitated.

(Embodiment 2)
FIGS. 2A, 2B and 2C are views showing a liquid discharge head and a protective tape attached thereto according to the second embodiment of the present invention. FIG. It is the figure which looked at the discharge surface where this row | line | column was arrange | positioned from the front, The same figure (b) is the same figure which shows the other form of the protective tape of this embodiment, The same figure (c) is the same figure. It is AA sectional view taken on the line in (a).

  In this embodiment, a PET film having a thickness of 500 μm is used as the substrate 1 of the protective tape 14. When a base material of the same material is used, gas permeability is lower when a thick base material is used. Therefore, if a thick base material is used as the protective tape 14, the amount of ink evaporated through the protective tape 14 during distribution can be suppressed. The pressure-sensitive adhesive 2 as a bonding agent formed on the substrate 1 is acrylic and has a thickness of 50 μm. And the width | variety of the protective tape 14 is wider than the width | variety of a discharge surface, and the part corresponding on the 2nd sealing agent 4 gave a punching process, and opened the hole. Of course, this hole may be formed by using another method such as laser processing.

  The protective tape 14 was bonded to the liquid discharge head 9 as shown in FIG. 2A, thereby completing the liquid discharge head 9 in a physical distribution state. That is, the protective tape is attached to the head so that the hole portion of the protective tape 14 is located at a position corresponding to the second sealant 4.

  In this state, an acceleration test was performed so as to reproduce the environment until the package was opened by a general consumer, and the state of the protective tape was confirmed. As a result, peeling of the protective tape from the water repellent layer 12 was not observed.

  According to this embodiment, when the protective tape 14 is peeled off, the ink may ooze out from the discharge port 11, but the protective tape 14 and the discharge port 11 are arranged in the same direction. Even if the ink oozes out from the ejection port 11 at the time of peeling, the oozed ink is pulled in the peeling direction of the protective tape 14, and the oozed ink does not flow across the ink row, and the Color mixing can be prevented.

  As a modification of the present embodiment, as shown in FIG. 2B, holes corresponding to the sealing agent 4 at two locations may be provided in the protective tape 14, and this tape is bonded to the liquid discharge head 9. Even if it is a thing, the same effect can be acquired.

(Embodiment 3)
FIG. 9 shows a liquid discharge head according to a third embodiment of the present invention and a protective tape attached thereto.

  The protective tape 14 of this embodiment uses a PET film having a thickness of 12 μm as the substrate 1 and an acrylic adhesive as the adhesive 2 as a bonding agent. And the adhesive 2 is apply | coated on the base material 1 so that thickness may be set to 30 micrometers. The width of the protective tape 14 is longer than the width of the discharge surface in the extending direction of the rows of the discharge ports 11, and the portion corresponding to the second sealant 4 is punched to make a hole. Note that the hole may be processed by another method such as laser processing.

  As shown in FIG. 9, the protective tape 14 is attached to the liquid discharge head 9 so that the holes corresponding to the second sealant 4 are aligned with the positions of the sealants, thereby enabling the liquid discharge in the physical state. Head 9 is assumed. In this state, an acceleration test was conducted so as to reproduce the environment until the package was opened under general consumers, and the state of the tape was confirmed. As a result, no peeling of the protective tape from the water repellent layer 12 was observed.

  In addition, as shown in FIG. 10, the same effect can be acquired also when the row | line | column of the discharge outlet 11 and the 2nd sealing agent 4 are formed substantially in parallel.

  In the first embodiment described above, the width of the protective tape 14 is set within the interval of the second sealant 4. In this case, when the width of the discharge surface is narrow, the width of the tape is correspondingly reduced, and the protective tape 14 may be broken when the protective tape 14 is peeled off. Furthermore, there are cases where workability is poor, for example, it is difficult for the user to grasp the protective tape 14. Therefore, by taking a form like this embodiment, it becomes possible to form the width of the protective tape 14 wide and prevent the protective tape from being broken at the time of peeling.

(Embodiment 4)
FIGS. 11A and 11B are views showing a liquid discharge head according to this embodiment and a protective tape bonded thereto, and FIG. 11A shows a discharge surface on which rows of discharge ports 11 are arranged. FIG. 2B is a cross-sectional view taken along line AA in FIG.

  In this embodiment, the protective tape 14 uses a 500 μm-thick PET film as the substrate 1, and the adhesive 2 as the bonding agent uses an acrylic adhesive. And the adhesive 2 is apply | coated on the base material 1 so that thickness may be set to 50 micrometers. The width of the protective tape 14 is longer than the length of the second sealant 4 row, and the portion corresponding to the second sealant 4 is not less than the height of the second sealant 4 by laser processing. Counterbore 16 is formed to a depth. As shown in FIG. 12, the counterbore 16 shape is formed by forming an adhesive layer 2 having a height of the second sealant 4 or higher on the base material 1 by using a general method such as screen printing. It may be formed by removing the adhesive layer in the part.

  The protective tape 14 is bonded to the liquid discharge head 9 as shown in FIGS. 11A and 11B to form the liquid discharge head 9 in a physical distribution process. In this state, an acceleration test was carried out so as to reproduce the environment until the package was opened under general consumers, and the result was confirmed. As a result, no peeling of the protective tape from the water repellent layer 12 was observed.

  In the protective tape of the second embodiment described above, the protective tape 14 is bonded only at the head portion of the extended portion of the second sealant 4 row, and when the bonding range is narrow, the protective tape 14 is torn at the time of peeling. There is a possibility that. Therefore, by forming the counterbore 16 on the portion corresponding to the second sealant 4 of the protective tape 14 so that the protective tape 14 is not joined to the second sealant 4 as in this embodiment. The strength of the protective tape 14 at the extended portion of the second sealant 4 rows can be given, and the protective tape can be prevented from being broken at the time of peeling.

(Other embodiments)
Each embodiment described above relates to an example in which a pressure-sensitive adhesive is used as a bonding layer. It is clear from the above description that the protective tape of the embodiment can be implemented.

It is a figure which shows the state which bonded the liquid discharge head concerning the 1st Embodiment of this invention, and a protective tape to it. (A), (b), and (c) are the figures which show the state which bonded together the liquid discharge head which concerns on the 2nd Embodiment of this invention, and a protective tape. (A) And (b) is a figure which shows the state which bonded together the liquid discharge head which concerns on the modification of the said 1st Embodiment, and its protective tape. FIG. 3 is a perspective view showing a liquid discharge head according to an embodiment of the present invention. It is a perspective view which shows the state which bonded the protective tape to the liquid discharge head of the said 1st Embodiment. (A) And (b) is sectional drawing of the liquid discharge head shown in FIG. It is a figure which shows the state which affixed the protective tape on the liquid discharge head by the conventional method. It is sectional drawing which shows the protective tape which concerns on one Embodiment of this invention. It is a figure which shows the state which bonded together the liquid discharge head which concerns on the 3rd Embodiment of this invention, and a protective tape. It is a figure which shows the state which bonded together the liquid discharge head which concerns on the modification of the said 3rd Embodiment, and its protective tape. (A) And (b) is a figure which shows the state which bonded together the liquid discharge head which concerns on the 4th Embodiment of this invention, and its protective tape. It is sectional drawing which shows the protective tape in the said 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base material 2 Adhesive 3 First sealing agent 4 Second sealing agent 5 Substrate 6 Electric wiring member (TAB)
DESCRIPTION OF SYMBOLS 7 Electrode terminal 8 Electrode part 9 Liquid discharge head 10 Ink supply holding member 11 Discharge port 12 Water repellent layer 13 Ink flow path 14 Protection tape 15 Ink supply port 16 Counterbore

Claims (13)

In a liquid discharge head having a discharge surface provided with a discharge port for discharging liquid, and a convex portion protruding higher than the discharge surface,
A protective tape that has a base material and a bonding layer, is attached to the liquid discharge head and protects the head, is bonded to the discharge surface including the discharge port, and the bonding layer is formed on the convex portion. Is not bonded protective tape,
A liquid discharge head characterized by comprising:   The liquid ejection head according to claim 1, wherein the convex portion is a sealant that covers an electrode provided on the liquid ejection head and an electric wiring connected to the electrode.   The convex portion extends in a direction intersecting a plurality of the ejection port rows, a longitudinal direction of the protective tape is along a direction intersecting the ejection port row, and a width of the protective tape is a direction of the ejection port row The liquid discharge head according to claim 1, wherein the liquid discharge head is shorter than a length of the discharge surface.   The convex portion extends in a direction intersecting a plurality of the ejection port rows, a longitudinal direction of the protective tape is along a direction intersecting the ejection port row, and a width of the protective tape is a direction of the ejection port row The protective tape is longer than the length of the discharge surface, and the protective tape is joined to both sides of the extending convex portion by forming a hole in the protective tape at a location corresponding to the convex portion. The liquid discharge head according to claim 1.   The convex portion extends in a direction intersecting with the plurality of ejection port rows, the longitudinal direction of the protective tape extends along a direction substantially parallel to the ejection port row, and the protective tape width extends in the convex portion. 2. The protective tape is bonded on an extension line of the extending convex portion by forming a hole at a location corresponding to the convex portion in the protective tape, which is longer than the length of the convex portion. Or the liquid discharge head of 2.   The convex portion extends substantially in parallel with the plurality of ejection port rows, the longitudinal direction of the protective tape extends along a direction substantially parallel to the ejection port row, and the protective tape width is orthogonal to the ejection port row. The liquid discharge head according to claim 1, wherein the liquid discharge head is shorter than a length of the discharge surface in a direction.   The convex portion extends substantially in parallel with the plurality of ejection port rows, the longitudinal direction of the protective tape extends along a direction substantially parallel to the ejection port row, and the width of the protective tape is orthogonal to the ejection port row. It is longer than the length of the discharge surface in the direction to be formed, and the protective tape is bonded to both sides of the extending convex portion by forming a hole in the protective tape at a location corresponding to the convex portion. The liquid discharge head according to claim 1 or 2.   The convex portion extends substantially in parallel with the plurality of ejection port rows, the longitudinal direction of the protective tape extends along a direction substantially perpendicular to the ejection port row, and the width of the protective tape extends the convex portion. The protective tape is bonded on the extension of the convex portion by forming a concave portion at a location corresponding to the convex portion on the protective tape, which is longer than the length of the convex portion. The liquid discharge head described.   The liquid ejection head according to claim 1, wherein the bonding layer of the protective tape is formed of an adhesive. Protects the head by being attached to a liquid discharge head that has a base material and a bonding layer, and has a discharge surface with a discharge port for discharging liquid, and a convex portion protruding higher than the discharge surface. In the protective tape to
The protective tape characterized in that the width of the protective tape is shorter than the length of the discharge surface in the direction of the discharge port array. Protects the head by being attached to a liquid discharge head that has a base material and a bonding layer, and has a discharge surface with a discharge port for discharging liquid, and a convex portion protruding higher than the discharge surface. In the protective tape to
A protective tape, wherein a hole is formed in a portion corresponding to the convex portion in the protective tape. Protects the head by being attached to a liquid discharge head that has a base material and a bonding layer, and has a discharge surface with a discharge port for discharging liquid, and a convex portion protruding higher than the discharge surface. In the protective tape to
A protective tape, wherein a concave portion is formed at a location corresponding to the convex portion on the protective tape. A discharge portion provided with a discharge port for discharging the liquid;
A liquid discharge head comprising a support part for supporting the discharge part and a holding part for holding the support part, wherein the holding part, the support part and the discharge part are sealed by a sealing part,
A liquid discharge head in a physical distribution process, wherein a portion other than the sealing portion is protected by a protective tape.

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