JPH05124201A - Transfer molding resin composition for ink jet recording heads, production of ink jet recording head using the same composition, ink jet recording head produced by hte same method, and recorder provided with the same recording head - Google Patents

Abstract

PURPOSE:To obtain a recording head not generating separation at an interface between a molded resin layer and a substrate even in a long term storage under high- temperature and high-humidity conditions by incorporating at least an epoxy resin having a polysulfide skeleton in a main chain. CONSTITUTION:A transfer molding resin composition for ink jet recording heads is formed by containing an epoxy resin having a polysulfide skeleton in a main chain. On a substrate 21, an energy generating element 22a to deliver ink is provided. A solid layer 26 having a liquid path pattern including a liquid chamber part 26c is provided on the substrate 21 correspondingly to the element 22a. After that, on the substrate 21, a molded resin layer is so provided as to cover the solid layer 26. By removing the solid layer 26, an ink liquid chamber 26c containing an ink supply port 29d, an ink delivery port 29a, and a liquid path 29b are formed. In this ink jet recording head production method, the molded resin layer is composed of a cured body of said resin composition. In this manner, at a substrate/molded resin layer interface, a generated stress is reduced, and a separation at an interface is prevented from occurring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an ink jet recording head, and more particularly to an outer shape forming method by a molding method. The present invention also relates to an ink jet recording head manufactured by the manufacturing method and a recording device including the recording head.

[0002]

2. Description of the Related Art Generally, an ink jet recording head (hereinafter referred to as "recording head") applied to an ink jet recording system has an ejection port for ejecting ink and an ink for supplying to the ejection port. A liquid chamber for storing the liquid, a liquid path for communicating the discharge port with the liquid chamber, an energy generating element provided in a part of the liquid path for generating energy for discharging ink, and an external device for the liquid chamber. An ink supply port is provided to supply ink from.

The following is known as a conventional method of manufacturing a recording head.

(1) A first substrate provided with an energy generating element is provided, and an ink ejection port, a liquid path and an ink liquid chamber are formed on a second substrate made of glass or metal by a processing means such as cutting or etching. After providing a concave portion for forming and an ink supply port for communicating the liquid chamber with the outside, the second substrate is bonded to the first substrate while aligning the positions of the energy generating element and the liquid passage. A method of bonding with an agent.

(2) A positive-type or negative-type photosensitive dry film is attached to a first substrate made of glass or the like on which an energy generating element is provided, and the ink discharge port, liquid path and ink of the photosensitive dry film are attached. A pattern corresponding to the liquid chamber is exposed by exposing it by masking or exposing, and a solid layer having a pattern corresponding to the ink discharge port, the liquid path and the ink liquid chamber is provided on the first substrate. A liquid curable material mixed with a curing agent is applied on the solid layer and the first substrate to an appropriate thickness, and left at a predetermined temperature for a long time to cure the curable material. Then, the first substrate on which the curable material is cured is cut at a position where an ejection port is formed to expose the end face of the solid layer, and then the solid layer is immersed in a solvent that dissolves the curable material. A method of dissolving and removing the solid layer from the cured first substrate to provide a space for forming a liquid passage and an ink liquid chamber therein (JP-A-61-15).
497).

(3) A positive type or negative type photosensitive dry film is attached to the first substrate provided with the energy generating element, and corresponds to the ink discharge port, the liquid passage and the ink liquid chamber in the photosensitive dry film. The pattern to be masked or exposed and exposed, and then developed to the ink discharge port,
First, a solid layer having a pattern corresponding to the liquid passage and the ink liquid chamber is formed.
Provided on the substrate. An active energy ray curable material that is cured by an active energy ray is applied to the solid layer and the first substrate to an appropriate thickness to provide a recess and an ink supply port for forming a part of an ink liquid chamber. The active energy ray transparent second substrate is attached to the active energy ray curable material by aligning the concave portion with a predetermined position where the liquid chamber is formed to form a laminated body. Then, the second substrate is masked so as to hide the portion of the active energy ray-curable material in which the ink liquid chamber is to be formed, and the active energy ray is passed through the second substrate to the active energy ray-curable material. Irradiate and cure. Then, after the active energy ray-curable material is cured, the laminated body is cut at a position to form a discharge port to expose the end surface of the solid layer, and then the solid layer and an uncured active energy ray-curable material. Is dissolved in a solvent that dissolves the solid layer and the uncured active energy ray-curable material to be removed from the laminate to provide a space for forming a liquid passage and an ink liquid chamber therein. No. 62-253457).

(4) Recently, a manufacturing method has been proposed in which a mold resin layer including an ink liquid passage, an ink liquid chamber, an ink supply port, and a top plate is collectively molded by transfer molding.

[0008]

In the above-described conventional method of manufacturing each recording head, in the recording head manufacturing method of (1), the concave portion for forming the ink liquid chamber provided on the second substrate is enlarged. Thus, there is an advantage that a recording head having a large ink liquid chamber suitable for high-speed recording can be manufactured, but when the first substrate and the second substrate are bonded by an adhesive, the first substrate It is necessary to precisely align the fine energy generating element of the above with the fine liquid passage of the second substrate, and when bonding with an adhesive, it is necessary to devise that the adhesive does not flow into the fine liquid passage. However, there is a problem in that the apparatus for that purpose becomes complicated and expensive, lacks in mass productivity, and raises the cost of the product.

In the method of manufacturing the recording head of (2),
There is an advantage that the problem that occurs when the first substrate and the second substrate are attached to each other, which is found in the method (1) of manufacturing the recording head, can be solved. However, since the volume of the ink liquid chamber is limited to the same height as the thickness of the patterned solid layer provided on the first substrate, it cannot be increased so much, and the process is complicated and time-consuming. However, since the number of processes is large, there is still a problem that mass productivity is lacking, which causes an increase in product cost.

In the method of manufacturing a recording head of (3), the second method is used.
The advantage that a recording head having a large liquid chamber can be manufactured by enlarging a concave portion for forming a part of the ink liquid chamber provided on the substrate and the manufacturing method of the recording head described in (1). There is an advantage that a problem that occurs when the first substrate and the second substrate are bonded together can be solved. However, similar to the method of manufacturing the recording head of (2), the process is complicated and time-consuming, and since the number of processes is further increased, there is a problem in that mass productivity is also lost and the cost of the product is increased.

The method of manufacturing a recording head of (4) is simple and does not require the step of precisely aligning and sticking two substrates together, and is suitable for high-precision, high-reliability mass production with a small number of steps. There is an advantage that an inexpensive inkjet recording head can be manufactured. However, since the recording head is subjected to stress due to heat shrinkage caused by the curing shrinkage of the mold resin layer and the difference in expansion coefficient between the mold resin layer and the substrate, if the recording head is rarely exposed to high temperature and high humidity for a long time, Peeling may occur at the interface between the layer and the substrate, which may affect ink ejection.
Similarly, when the resin is exposed to high temperature for a long time, the resin expands due to the ink and peels off at the interface, which may affect the ejection of the ink.

The present invention has been made especially in view of the above-mentioned problems with respect to the method of manufacturing a recording head of (4), and an ink jet recording head which does not affect ink ejection even at high temperature and high humidity for a long time, and the same. It is intended to provide a resin composition for transfer molding to be used.

[0013]

Means for Solving the Problems The inventors of the present invention have conducted extensive research to obtain a recording head in which peeling does not occur at the interface between a mold resin layer and a substrate even after storage at high temperature and high humidity for a long time. Point became clear.

That is, 1. 1. To improve the ink resistance of resin. By lowering the elastic modulus of the cured resin and relieving the stress due to heat shrinkage, peeling between the mold resin layer and the substrate can be reduced. Further, as satisfying the above conditions, it has been found that it is effective to include an epoxy resin having a polysulfide skeleton in the main chain in a resin composition for molding. Although its mechanism of action is not clear, it is considered that the water resistance and flexibility of the polysulfide structure bring about a decrease in ink resistance and elastic modulus as a cured resin.

Therefore, the present invention for achieving the above object is a transfer mold resin composition for an ink jet recording head, which contains at least an epoxy resin having a polysulfide skeleton as a main chain.

Further, the present invention is the above transfer mold resin composition, wherein the epoxy resin having a polysulfide skeleton in the main chain is liquid at room temperature.

Further, according to the present invention, an energy generating element for ejecting ink is provided on the substrate, and then a solid layer having a liquid path pattern including at least a liquid chamber is formed on the substrate corresponding to the energy generating element. Then, a mold resin layer is formed on the substrate by transfer molding to cover the solid layer, and then the solid layer is removed to form an ink liquid chamber including an ink supply port, an ink ejection port for ejecting ink, and A method of manufacturing an ink jet recording head for forming a liquid path communicating between the liquid chamber and the ejection port, wherein the mold resin layer is made of a cured product of the resin composition.

Further, the present invention relates to an ink jet recording head manufactured by the above manufacturing method, wherein an energy generating element generates heat by applying electric energy to generate a state change in the ink and eject the ink. And a full line type in which a plurality of ejection openings are provided over the entire width of the recording area of the recording medium.

Further, according to the present invention, the recording is provided with at least the recording head having the ejection port for ejecting ink to the recording surface of the recording medium and the member for mounting the recording head. It is a device.

The present invention will be described in detail below.

Materials constituting the resin composition of the present invention include an epoxy resin, a curing agent and a curing accelerator.

The epoxy resin can be used alone or as a mixture of plural kinds. When used alone, one having a polysulfide skeleton in the main chain is used. When used as a mixture of a plurality of types, an epoxy having a polysulfide skeleton which is liquid at room temperature as a main chain, such as polysulfide-modified epoxy resins FLEP-10, PLEP-50 and FLEP-60 (trade name: manufactured by Toraythiocol). A resin and a conventionally known epoxy resin are used. Examples of such epoxy resin include, in addition to the above resins, bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, glycidyl ether type epoxy resin. Etc.

As the curing agent, acid anhydrides and amine type curing agents can be used. Examples of the acid anhydrides include phthalic anhydride, maleic anhydride, trimellitic anhydride, pyromellitic anhydride, hexahydrophthalic anhydride, tetrahydrophthalic anhydride, methylnadic acid anhydride, nadic acid anhydride and glutaric anhydride. Known materials can be used. As the amine curing agent, metaphenylenediamine, 4,4′-diaminodiphenylmethane, 4,4′-
Known compounds such as diaminodiphenyl sulfone, metaxylylenediamine, tetraethylenepentamine, diethylamine and propylamine can be used.

Further, examples of the curing accelerator include tertiary amines, imidazoles, carboxylic acid metal salts and phosphorus compounds.

Further, the resin composition of the present invention contains a filler, a coloring preventing agent, a deterioration preventing agent, if necessary, in addition to the above components.
Conventionally known additives such as a release agent may be used.

The preferred blending amount of the resin composition of the present invention is
Epoxy resin 100 parts, curing agent 55 parts, curing accelerator 1
Parts and, if necessary, 14 parts of filler, which are obtained by kneading by a known technique such as a melt mixing method.

1 to 5 shown below exemplify the procedure of the method for manufacturing an ink jet recording head of the present invention, and FIG. 6 shows an example of the constitution of the ink jet recording head of the present invention.

In the present invention, first, as shown in FIG. 1, an energy generating element 22a such as an electrothermal converter or a piezoelectric element and a control signal input electrode 22 are provided on a substrate 21 made of glass, a silicon wafer, ceramics or the like. Are installed to form the element surface 21a. Next, as shown in FIG. 2, the solid layer 26 having at least the pattern of the ink liquid chamber portion 26c and the liquid passage portion 26b is formed by a known method such as photolithography. Here, as the material of the solid layer, a high precision positive plating resist or the like can be used. Although the above drawing shows a case where there are three ink ejection ports, a multi-array type recording head having more ink ejection ports can of course be manufactured in the same manner.

Next, as shown in FIG. 3, the substrate on which the solid layer is formed is placed between the upper die 28 and the lower die 27 and clamped, and then transfer molding is performed.

Here, the transfer molding will be described. The upper mold 28 is provided with a cavity portion 28a and a protrusion portion 28b, and the cavity portion 28 is further provided.
a has a runner, a gate, and an air bleeding structure,
Mold resin is fed into this and cured and molded. The preheating temperature of the resin before it is sent to the cavity is 6
0-90 degreeC is preferable. Molding conditions include injection pressure 2
General conditions of 0 to 140 kgf / cm ² , a mold temperature of 100 to 180 ° C., a holding pressure curing time of 1 to 10 minutes and post-curing after molding can be applied. At the time of molding, appropriate points are set within the above-mentioned range while observing the moldability (shape, bubbles in resin, burr, flash, etc.). Generally, the higher the mold temperature, the shorter the curing time. Also, the higher the injection pressure, the more stable the shape is and the less the generation of bubbles, but excessive pressure causes damage to the product, resin burr,
It causes problems such as flash. Further, the post-curing does not necessarily have to be performed continuously with the molding, and may be performed at any time until the product is completed. Therefore, it can be performed at a convenient stage of the process. Of course, the above steps may be omitted depending on the usage state of the product.

Further, a releasing agent may be used in a molding die or the like for the purpose of improving the releasability when the product is released from the die after molding.

After the completion of molding, the ejection surface is cut and polished as needed to prepare a process product of an ink jet recording head as shown in FIG. In the figure, 29 is a mold resin layer made of a cured product of the resin composition of the present invention. 30 is a discharge port surface.

Then, the solid layer is dissolved and removed with an appropriate solvent to complete the ink liquid chamber 29c including the ink supply port 29d, the liquid passage 29b and the ink discharge port 29a as shown in FIG. Examples of the solvent for removing the solid layer include acetone and an aqueous solution of NaOH. The solvent does not attack the mold resin layer made of the epoxy resin composition.

After that, the ink jet recording head is subjected to various cleaning, surface treatment and the like, and auxiliary components such as filters are attached to complete the final product, but it is omitted here because it is not directly related to the purpose of the present invention. ..

FIG. 6 is a partially cutaway view showing one structural example of the recording head of the present invention manufactured by the above manufacturing method.

The present invention is particularly effective in an ink jet recording type recording head and recording apparatus for recording by forming recording droplets by utilizing thermal energy among the ink jet recording methods. is there.

Regarding the typical structure and principle thereof, see, for example, US Pat. Nos. 4,723,129 and 4740.
No. 796, the present invention is preferably carried out using these basic principles. This recording method is applicable to both the so-called on-demand type and continuous type.

To briefly explain this recording method, the electrothermal converter arranged corresponding to the sheet or liquid path holding the liquid (ink) is changed to the liquid (ink) corresponding to the recording information. Thermal energy is generated by applying at least one drive signal for giving a rapid temperature rise that causes the film boiling phenomenon beyond the nucleate boiling phenomenon, and causes the film boiling on the heat acting surface of the recording head. .. In this way, bubbles can be formed in one-to-one correspondence with the drive signal applied from the liquid (ink) to the electrothermal converter, which is particularly effective for the on-demand recording method. By the growth and contraction of the bubbles, liquid (ink) is ejected through the ejection holes,
Form at least one drop. It is more preferable to make this drive signal into a pulse shape, because the bubble growth and contraction are immediately and appropriately performed, so that the ejection of the liquid (ink) with excellent responsiveness can be achieved. As the pulse-shaped drive signal, U.S. Pat. Nos. 4,463,359 and 4,345 are used.
Those as described in the '262 patent are suitable. If the conditions described in US Pat. No. 4,313,124 of the invention relating to the rate of temperature rise on the heat acting surface are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the constitution (straight-shaped liquid passage or right-angled liquid passage) in which the ejection holes, the liquid passages, and the electrothermal converters are combined as disclosed in the above-mentioned respective specifications, US Pat. No. 4,558,333, US Pat. No. 4
As disclosed in Japanese Patent No. 459600, the present invention includes a structure in which the heat acting portion is arranged in a bending region.

In addition, Japanese Patent Laid-Open No. 123670/1984 discloses a structure in which a common slit is used as a discharge hole for a plurality of electrothermal converters, and a pressure wave of thermal energy is absorbed. The present invention is also effective in a configuration based on Japanese Patent Laid-Open No. 138461 of 1984, which discloses a configuration in which the corresponding opening corresponds to the ejection portion.

Further, as a recording head in which the present invention is effectively used, there is a full line type recording head having a length corresponding to the maximum width of the recording medium which can be recorded by the recording apparatus.
The full line head may be a full line configuration formed by combining a plurality of print heads as disclosed in the above-mentioned specification, or may be a single full line print head integrally formed.

In addition, by being attached to the apparatus main body, it can be electrically connected to the apparatus main body and ink can be supplied from the apparatus main body, which is a replaceable chip type recording head or the recording head itself. The present invention is also effective when a cartridge-type recording head that is specially provided is used.

Further, it is preferable to add recovery means for the recording head, preliminary auxiliary means, etc. to the recording apparatus of the present invention because the recording apparatus of the present invention can be made more stable. Specific examples of these are: preheating of the recording head by capping means, cleaning means, pressure or suction means, electrothermal converter or other heating element, or a combination thereof. It is also effective to perform stable recording by adding means for performing a preliminary ejection mode for performing ejection different from the means and recording.

Further, the recording mode of the recording apparatus is not limited to the mode in which only the mainstream color such as black is recorded, and either the recording head may be integrally formed or a plurality of recording heads may be combined. However, the present invention is extremely effective for an apparatus provided with at least one of a multicolor of different colors or a full color by mixing colors.

In the embodiments of the present invention described above, the liquid ink is used for description, but in the present invention, either an ink which is solid at room temperature or an ink which is in a softened state at room temperature is used. Can be used. In the above-mentioned inkjet device, the temperature of the ink itself is generally adjusted within the range of 30 ° C. or higher and 70 ° C. or lower to control the temperature of the ink so that the viscosity of the ink is within the stable ejection range. Any liquid may be used as long as the ink is liquid.

In addition, the excessive temperature rise of the head or the ink due to thermal energy is positively prevented by using it as the energy for the state change of the ink from the solid state to the liquid state, or the evaporation of the ink is prevented. It is also possible to use an ink that solidifies when left as it is. In any case, liquefaction occurs only when heat energy is applied, such as when the ink is liquefied by applying heat energy according to the recording signal and ejected as an ink liquid, or when it begins to solidify when it reaches the recording medium. The use of an ink having the property of applying is also applicable to the present invention.

Such an ink is disclosed in JP-A-54-568.
No. 47 or Japanese Unexamined Patent Publication No. 60-71260, such that it opposes an electrothermal converter while being held as a liquid or solid in the recesses or through holes of a porous sheet. It may be in the form.

In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

FIG. 7 is an external perspective view showing an example of an ink jet recording apparatus (IJRA) in which the recording head obtained by the present invention is mounted as an ink jet head cartridge (IJC).

In the figure, reference numeral 120 denotes an ink jet head cartridge (IJC) provided with a nozzle group for ejecting ink so as to face the recording surface of the recording paper fed onto the platen 124. Reference numeral 116 denotes a carriage HC that holds the IJC 120, and is connected to a part of a drive belt 118 that transmits the driving force of the drive motor 117, and two guide shafts 119A and 119 that are arranged in parallel with each other.
By making it slidable with B, the reciprocating movement over the entire width of the recording paper of the IJC 120 becomes possible.

Reference numeral 126 is a head recovery device, which is IJC1.
It is arranged at one end of the movement path of 20, for example, a position facing the home position. The motor 1 via the transmission mechanism 23
The head recovery device 126 is operated by the driving force of 22, and the IJC 120 is capped. IJC1 by the cap portion 126A of the head recovery device 126
Head recovery device 1 in connection with capping to 20
The ink is sucked by an appropriate suction means provided inside the nozzle 26 or the ink is pressure-fed by an appropriate pressurizing means provided at the ink supply path to the IJC 120, and the ink is forcibly discharged from the ejection port to increase the viscosity in the nozzle. Ejection recovery processing such as ink removal is performed. Further, the IJC is protected by capping at the end of recording or the like.

Reference numeral 130 denotes a blade as a wiping member which is disposed on the side surface of the head recovery device 126 and is made of silicon rubber. The blade 131 is held by the blade holding member 131A in the form of a cantilever, and like the head recovery device 126, the motor 122 and the transmission mechanism 123.
It is possible to engage with the ejection surface of the IJC 120. This allows the blade 131 to move to the IJC 12 at an appropriate timing in the recording operation of the IJC 120 or after the ejection recovery process using the head recovery device 126.
It is projected in the movement path of 0 and wipes out dew condensation, wetting, dust or the like on the ejection surface of the IJC 120 as the IJC 120 moves.

[0053]

The present invention will be described in more detail with reference to the following examples. Example 1 First, 80 parts of Epicoat 1001 (trade name, manufactured by Yuka Shell Co., Ltd.) and 20 parts of triglycidyl isocyanate (manufactured by Nissan Kagaku Co., Ltd.) were prepared as epoxy resins, and tetrahydrophthalic anhydride (New Japan) was used as a curing agent. Rika Co., Ltd.
55 parts and curing catalyst 2E4MZ (manufactured by Shikoku Chemicals)
1 part was added, mixed while heating and melting, and the curing reaction was allowed to proceed to prepare a B-stage epoxy resin having a gelation time of 40 seconds at 130 ° C. After cooling this resin to room temperature, 30 parts of epoxy resin FLEP60 (trade name, manufactured by Toray Thiokol Co., Ltd.), which has a polysulfide skeleton in the main chain and is liquid at room temperature, is mixed with the crushed product, and then tableted. Thus, an epoxy resin composition tablet was obtained.

Next, the electrothermal converter and the aluminum electrode were placed on the glass substrate. Then, a high-precision positive type plating resist is applied on the substrate to a thickness of 30 μm, and after curing, it is exposed through a pattern mask, further subjected to heat development, and then washed with a special phenomenon liquid to obtain a liquid path. A patterned solid layer was formed.

The substrate on which the above solid layer was formed was placed between the upper mold and the lower mold, and a mold resin layer made of the above resin composition was formed by transfer molding. Molding conditions are preheating temperature 85 ℃, injection pressure 40kg
f / cm ² , mold temperature 130 ° C., holding pressure curing time 8 minutes, and post cure.

After forming the mold resin layer, the recording head was immersed in acetone to dissolve and remove the solid layer to obtain an ink jet recording head according to the present invention.

Next, the completed recording head is moved to 60 ° C.
The defect occurrence rate after 360 hours and 720 hours under high temperature and high humidity of 90% humidity was examined. Similarly, the defect occurrence rate under a high temperature environment of 80 ° C. dry was examined. The results are shown in Table 1.

Further, a cured product of the resin composition is prepared,
The swelling amount when immersed in the ink was determined to evaluate the ink resistance. The ink is Canon Bubble Jet Printer BJ10V (trade name, manufactured by Canon) and B
Two kinds of J330 (trade name, manufactured by Canon) were used and immersed in PCT at 120 ° C. for 10 hours. The results are also shown in Table 1. Comparative Example 1 An inkjet recording head was prepared in the same manner as in Example 1 except that the epoxy resin having a polysulfide skeleton in the main chain was not used, and the defective product occurrence rate and the ink resistance of the cured resin were examined. The results are shown in Table 1. Example 2 As a filler, spherical silica FB-3 having an average particle diameter of 12 μm
An inkjet recording head was prepared in the same manner as in Example 1 except that 5 (trade name, manufactured by Denki Kagaku Kogyo) was added to prepare a B-stage epoxy resin. Table 1 shows the results of examining the defective product occurrence rate and the ink resistance of the cured resin as in Example 1. Comparative Example 2 An inkjet recording head was prepared in the same manner as in Example 2 except that the epoxy resin having a polysulfide skeleton in the main chain was not used. Similarly, the results of examining the defective product generation rate and the ink resistance of the cured resin are shown in Table 1.

[0059]

[Table 1]

[0060]

As described above, the interface between the substrate and the mold resin layer is formed by forming the mold resin layer of the recording head with a resin cured product containing an epoxy resin having a polysulfide skeleton as a main chain as a constituent component. The stress generated in the mold is reduced, and in addition, the ink resistance of the mold resin layer is improved. As a result, stable ink ejection can be obtained without peeling at the interface between the substrate and the mold resin layer even under high temperature and high humidity.

In particular, when the epoxy resin having the polysulfide skeleton in the main chain is liquid at room temperature, it exhibits a superior effect.

[Brief description of drawings]

FIG. 1 is a process drawing showing an example of element surface formation on a substrate according to a manufacturing method of the present invention.

FIG. 2 is a process drawing showing an example of forming a solid layer on a substrate according to the manufacturing method of the present invention.

FIG. 3 is a cross-sectional view showing an example of the configuration in a mold for transfer molding according to the manufacturing method of the present invention.

FIG. 4 is a cross-sectional view showing a configuration example of a printhead process product after forming a mold resin layer according to the manufacturing method of the present invention.

5 is a cross-sectional view showing a configuration example of a printhead process product after removing a solid layer from the printhead process product shown in FIG.

FIG. 6 is a partially cutaway view showing one structural example of an inkjet recording head according to the present invention.

FIG. 7 is a perspective view showing a configuration example of a recording apparatus including the recording head according to the present invention.

[Explanation of symbols]

 21 Substrate 21a Element Surface 22 Control Signal Input Electrode 22a Energy Generation Element 26 Solid Layer 26b Liquid Path 26c Ink Liquid Chamber 27 Lower Mold 28 Upper Mold 28a Cavity 28b Projection 29 Mold Resin Layer 29a Ink Discharge Port 29b Liquid path 29c Ink liquid chamber 29d Ink supply port 30 Discharge port surface 116 Carriage 117 Drive motor 118 Drive belt 119A Guide shaft 119B Guide shaft 120 Inkjet head cartridge 122 Cleaning motor 123 Transmission mechanism 124 Platen 126 Cap member 130 Blade 130A Blade holding member

 ─────────────────────────────────────────────────── --Continued from the front page (54) [Title of Invention] Transfer mold resin composition for ink jet recording head, method for producing ink jet recording head using the composition, ink jet recording head produced by the production method and the ink jet recording head Recording device with recording head

Claims (7)

[Claims] 1. A transfer mold resin composition for an inkjet recording head, which comprises at least an epoxy resin having a polysulfide skeleton as a main chain. 2. The transfer mold resin composition for an ink jet recording head according to claim 1, wherein the transfer mold resin having a polysulfide skeleton in the main chain is liquid at room temperature. 3. An energy generating element for ejecting ink is provided on a substrate, and then a solid layer having a liquid path pattern including at least a liquid chamber is formed on the substrate so as to correspond to the energy generating element, and then transfer. A mold resin layer is formed on the substrate by molding to form a mold resin layer, and then the solid layer is removed to form an ink liquid chamber including an ink supply port, an ink ejection port for ejecting ink, and the liquid chamber. An ink jet recording head manufacturing method for forming a liquid path communicating with the discharge port, wherein the mold resin layer is formed of a cured product of the transfer mold resin composition according to claim 1. Recording head manufacturing method. 4. An ink jet recording head manufactured by the manufacturing method according to claim 3. 5. The ink jet recording head according to claim 4, wherein the energy generating element is an electrothermal converter for generating heat by applying electric energy to cause the ink to change state and to eject the ink. 6. The inkjet recording head according to claim 4, wherein the inkjet recording head is a full-line type in which a plurality of ejection openings are provided over the entire width of the recording area of the recording medium. 7. The recording head according to claim 4, further comprising an ejection port for ejecting ink to the recording surface of the recording medium, and a member for mounting the recording head. A recording device comprising at least a recording device.