CN1876378A - Liquid drop discharge head and manufacture method thereof, micro device, ink-jet head, ink cartridge, and ink-jet printing device - Google Patents

Abstract

Disclosed is a dropping liquid spray head, including chip formed by separating silicon crystal chip which has crossed first and second directions. The chip has a first separating line that parallels to the first direction, and a second separating line that parallels to the second direction. The method for getting the chip comprises steps of: employing the first separating method to form a notch that penetrates the silicon crystal chip on part of the first separating line, separating the chip from the silicon crystal chip along the first separating line; separating the chip from the silicon crystal chip along the second separating line with the second separating method, wherein the silicon crystal chip (110) is crystal-direction, the first separating line is parallel to the crystal direction of the silicon crystal chip (112).

Description

Injector head and manufacture method, microdevice, ink gun, print cartridge and PRN device

The application is that application number is 02817515.8, the applying date is on September 4th, 2002, the application people is Ricoh Co., Ltd, denomination of invention dividing an application for the application for a patent for invention of " liquid droplet ejecting head and manufacture method thereof, microdevice, ink gun, print cartridge and ink jet printing device ".

Technical field

The present invention relates to a kind of from nozzle liquid droplet ejecting head and manufacture method, a kind of microdevice, a kind of ink gun and a kind of ink jet printing device of liquid droplets.

Background technology

Ink gun is the liquid droplet ejecting head in a kind of ink jet printing device that provides as image recorder or image forming apparatus that is used in such as printer, facsimile machine or duplicator.Such ink gun comprises that the nozzle, one of a liquid droplets are communicated with sap cavity (claiming pressurization sap cavity, pressure chamber, spray chamber, ink via or the like again) and pressure-generating device that is produced as the pressure of the ink pressurization in the sap cavity that forms free path with nozzle.Utilization is pressurizeed to ink by the pressure that pressure-generating device produced in sap cavity, makes in the drops out from nozzles to spray.

About other liquid droplet ejecting head, for example, spray the liquid droplet ejecting head of liquid resist and spray the liquid droplet ejecting head of dna sample in the mode of drop in the mode of drop, be well-known.

In addition, as microdevice, for example, the actuator of micropump (or optical switch), micro-optical array, microswitch (or midget relay) and high power optical lens, micro flowmeter, pressure sensor or the like also are known.

To introduce ink gun below as representative instance.

Ink gun has three kinds of main types: piezo-electric type, thermomotive and electrostatic.Piezo-electric type is by using electromechanical transducer such as piezoelectric element as pressure-generating device the dividing plate on the surface that forms the sap cavity wall to be deformed and ink droplet is sprayed in displacement.Thermomotive is that the electrothermal conversioning element by the heating resistor of use in being arranged in sap cavity makes ink boiling generation China ink bubble spray ink droplet.Electrostatic is by dividing plate (or integrally formed electrode) that uses the surface that forms the sap cavity wall and the electrostatic force that opposite electrode produced thereof dividing plate to be deformed to spray ink droplet.

In traditional ink gun, sap cavity and the public sap cavity that is communicated with each sap cavity are to be made by the material such as photosensitive resin, resin mold, metal or glass.Yet, because the rigidity of resin is not enough, between the therefore adjacent sap cavity phase mutual interference might take place, thus the problem that exists image quality to worsen.

In addition, the rigidity of metal or glass is on the contrary enough, so the problem of phase mutual interference can not take place.But, the extremely difficult realization of manufacturing process of metal or glass sap cavity.And, at present,, require ink gun to have highdensity sap cavity in order to obtain high-quality reproduced image.For traditional ink gun, reach present this requirement and become very difficult ink gun.

No. the 3141652nd, Japan Patent, Japanese Laid-Open Patent Application disclose a kind of ink gun 7-276626 number and 9-226112 number, and in this ink gun, sap cavity and public sap cavity form by silicon substrate (silicon wafer) is carried out anisotropic etching.Very high and its manufacturing process of the rigidity of silicon can easily realize by using anisotropic etching.The vertical plane of this sap cavity can form by the silicon wafer that uses [110] crystal orientation, and this makes structure high density sap cavity become possibility.

When using silicon when forming the element of sap cavity, must go up at silicon substrate (silicon wafer) and form a plurality of sap cavity and public sap cavities that are equivalent to a chip, and then silicon substrate is separated into each independent chip.

In this case, cutting is usually as the method that silicon wafer is separated into chip.

In cutting, periphery is attached with the blade height rotation of bortz powder and moves along line of cut, thereby silicon wafer is cut into chip.

For example, Japanese Laid-Open Patent Application discloses a kind of silicon cutting method of eliminating smear metal adhesion in the cutting for 10-157149 number.In the method for above-mentioned document, on silicon wafer, form a predetermined pattern mask of cutting apart, carry out anisotropic etching then, thereby silicon wafer is divided into chip by V-shaped groove.

Japanese Laid-Open Patent Application discloses the silicon cutting method of smear metal adhesion in the another kind of elimination cutting for 5-36825 number.In the method for above-mentioned document, on silicon wafer, form first and second V-shaped grooves, and this first and second V-shaped groove is applied concentrated stress, thereby wafer is divided into chip by V-shaped groove.

Yet when carrying out chip by traditional cutting method when cutting apart, line of cut is straight, as shown in Figure 27, and must constitute each chip 201 with grid configuration on silicon wafer 200.Depend on the size and the shape of chip, will limit, and will increase the nonuseable part of wafer allocation plan.The quantity of the chip of being produced by a slice silicon wafer will reduce, thereby manufacturing cost will raise.

And, each chip that can only arrange and have identical size, and can not produce chip simultaneously with different size.

On the other hand, use anisotropic etch process that silicon wafer is divided into chip, increased the free degree of the allocation plan of chip on wafer.Its advantage is: can arrange on same wafer has the chip of different configurations, and by can increase the quantity of the chip of being produced with the form arrangement chip that staggers.

But, the die bonding after will cut apart must accurately contact the edge of chip with other parts to other parts the time alignedly.Like this, make the edge of chip have high accuracy with regard to requiring.But, be when finishing when cutting apart by anisotropic etching, be the precision that can't guarantee chip edge.

In other words, be marquis when finishing when cutting apart by anisotropic etching, under the effect in crystal orientation, Waffer edge is a wedge shape, just as blade, thereby can't obtain high accuracy.

When the thickness of wafer changed, because the edge of chip is a wedge shape, chip edge also can change, and caused the precision at this edge to worsen.Have again, because chip is a wedge shape, so the fracture that is taken place in the production process has caused the reduction of edge definition.

Depend on the crystal orientation of silicon, obtained linear edge by anisotropic etching.The reason that obtains linear edge is as follows: in the silicon wafer in (100) crystal orientation, two vertical＜110 of intersection are arranged〉direction.Yet, in the silicon wafer in (110) crystal orientation, have and do not intersect vertical two＜112〉direction or two＜110〉direction.Under latter event, silicon wafer can not be divided into rectangle or square chip.

When hope is divided into rectangle or square chip with the silicon wafer in (110) crystal orientation, need use with arrange pattern and form the method for cut-off rule of the form of straight line.Yet in this case, the edge of the chip that the result obtains will become zigzag, perhaps convex to form thereon, and such edge be unsuitable for alignment and it may produce particle.These particles will cause the bond quality of chip and dividing plate or nozzle plate to reduce.

And, when wafer being divided into chip fully, still having problems by anisotropic etching, resulting chip is dispersed in the etching solution.In this case, it is very difficult collecting chip.For fear of this problem, form and do not penetrate the V-shaped groove of cut-off rule, thereby make wafer can not be divided into chip fully.

But, the silicon wafer that forms cut-off rule by anisotropic etching has very little hardness, thereby exists this wafer in subsequent technique or the possibility of being damaged in transit.

And, when wafer is divided into chip, it is pushed with stress application, thereby wafer is separated by fracture by cylinder.As electronic equipment, size can be produced by carrying out separation cuts along the cut-off rule that is formed by anisotropic etching less than several square millimeters chip.Yet,,, probably under the effect of concentrated stress, cause the damage of this chip owing to wherein formed through hole or wherein be distributed with the sub-chip of various sizes for microdevice as the relatively large chip of size.

Summary of the invention

In order to overcome the problems referred to above, an object of the present invention is, provide a kind of through improved liquid droplet ejecting head and manufacture method, a kind of through improved microdevice, a kind of through improved ink gun, a kind of through improved print cartridge, a kind of through improved ink jet printing device thereof, they have increased the quantity of the chip that obtains from a wafer by improving on the wafer free degree of arrangement chip, provide with the easy location of other parts and make manufacturing cost lower.

In order to address the above problem, liquid droplet ejecting head of the present invention comprises one by cutting apart the head member chip that silicon wafer forms, and this silicon wafer has cross one another first direction and second direction.This chip comprises: one first cut-off rule, be parallel to this first direction of this silicon wafer, and this chip is cut apart on by a kind of first dividing method along this first cut-off rule from this silicon wafer; With one second cut-off rule, be parallel to this second direction of this silicon wafer, this chip is cut apart on by a kind of second dividing method along this second cut-off rule from this silicon wafer.

Ideal situation is that this chip is cut apart from wafer by etching along this first cut-off rule, and cuts apart from this wafer by cutting along this second cut-off rule.

In this case, ideal situation is, this chip is constituted as rectangular shape, its have parallel with this second cut-off rule vertically, the cutting of cutting apart this chip from this wafer is carried out along this second cut-off rule, with parallel with this first cut-off rule laterally, the etching of cutting apart this chip from this wafer is carried out along this first cut-off rule.

And ideal situation is, this silicon wafer is (110) crystal orientation, and this chip is formed by this silicon wafer, and by this first cut-off rule that etching is cut apart this chip from this silicon wafer be parallel to this silicon wafer＜112〉direction.

And, ideal situation is, this injector head comprises: one provides the sap cavity formation element of sap cavity, nozzle formation element, electrode forming element that electrode is provided that provides nozzle, and this chip forms at least, and this sap cavity forms element, this nozzle forms one of element and this electrode forming element.

Have, ideal situation is that this chip is not provided with any bridging part at the intersection point place of this first cut-off rule and this second cut-off rule again.

In order to address the above problem, the manufacture method of liquid droplet ejecting head of the present invention comprises step: first cut-off rule along this first direction that is parallel to this silicon wafer carries out etching to this silicon wafer, along this first cut-off rule a plurality of chips are cut apart each other; With second cut-off rule this silicon wafer is cut, to cut apart a plurality of these chips along this first and second cut-off rule from this silicon wafer along this second direction that is parallel to this silicon wafer.

Ideal situation is, each of these a plurality of chips is constituted as rectangular shape, its have parallel with this second cut-off rule vertically, this chip is cut apart from this silicon wafer by cutting step on this direction, with parallel with this first cut-off rule laterally, this chip is cut apart from this silicon wafer by etching step on this direction.

In this case, ideal situation is, this silicon wafer is (110) crystal orientation, these a plurality of chips that constitute with rectangular shape are arranged in this silicon wafer, and be used for by this first cut-off rule that etching step is cut apart this chip from this silicon wafer be parallel to this silicon wafer＜112〉direction.

In this case, ideal situation is to be used for being set to 1 micron or bigger by the width that etching step is cut apart this first cut-off rule of these a plurality of chips from this silicon wafer.

In order to address the above problem, the manufacture method of liquid droplet ejecting head of the present invention comprises step: first cut-off rule along this first direction that is parallel to this silicon wafer carries out etching to this silicon wafer, to cut apart a plurality of chips along this first cut-off rule from this silicon wafer; With second cut-off rule this silicon wafer is cut, to cut apart a plurality of these chips along this first and second cut-off rule from this silicon wafer along this second direction that is parallel to this silicon wafer.In this manufacture method, this etching step so carries out: after this etching step each independently chip do not separate fully, and this cutting step so carries out: after this cutting step, each independently chip separated fully.

Ideal situation is these a plurality of arrangements of chips are become the one group chip alignment parallel with this first direction of this silicon wafer, thereby this first cut-off rule of the adjacent column of this chip to stagger on the direction that is parallel to this second cut-off rule.

In this case, ideal situation is that this second cut-off rule is set to: this of one of these a plurality of chips second cut-off rule has the width even as big as the scope of the adjacent chips that is stretched over one of these a plurality of chips in this silicon wafer.

And ideal situation is, these a plurality of chips are cut apart from this silicon wafer, and the intersection point place between this first cut-off rule and this second cut-off rule is without any bridging part.

Ideal situation is, carries out this etching step by carrying out etching from the end face of this silicon wafer and bottom surface simultaneously, to form this first cut-off rule in this silicon wafer.

Ideal situation is in the structure that forms the head member chip, to carry out etching step, to form this first cut-off rule in this silicon wafer by being etched in.

For addressing the above problem, microdevice of the present invention comprises one by cutting apart the chip that silicon wafer forms, and provides this silicon wafer in the mode of the head member chip in liquid droplet ejecting head of the present invention.In this microchip, first and second dividing methods differ from one another, and choose from processing and laser treatment are handled, sprayed water to cutting, etching, blasting treatment, scroll saw.

According to liquid droplet ejecting head of the present invention, the head member chip is this silicon wafer is carried out etching and by second cut-off rule along this second direction that is parallel to this silicon wafer this silicon wafer cutting to be formed by first cut-off rule along this first direction that is parallel to this silicon wafer.Can easily locate with other parts.The free degree of arrangement chip is improved on silicon wafer, and the quantity of the chip that obtains from silicon wafer has obtained increase.Like this, improved output, and realized making cheaply.

According to the manufacture method of liquid droplet ejecting head of the present invention, the free degree of arrangement chip is improved on silicon wafer, and the quantity of the chip that obtains from silicon wafer obtained increase, has improved output, and has realized making cheaply.

According to microdevice of the present invention, this micromodule equipment has been installed a kind of liquid droplet ejecting head of the present invention, and the quantity of the chip that obtains from silicon wafer has obtained increase.Like this, improved output, and realized making cheaply.

According to ink gun of the present invention, this ink gun provides as a kind of liquid droplet ejecting head of the present invention, thereby the production efficiency of this ink gun can be improved, thereby has realized making cheaply.

According to print cartridge of the present invention, will form as one to the China ink jar of ink gun ink supply and the ink gun of injection ink droplet, and liquid droplet ejecting head of the present invention provides as ink gun.The production efficiency of this print cartridge can be improved, thereby has realized making cheaply.

According to ink jet printing device of the present invention, liquid droplet ejecting head of the present invention is to provide as the ink gun that sprays ink droplet, thereby the production efficiency of this ink jet printing device can be improved, thereby has realized making cheaply.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the ink gun of liquid droplet ejecting head first preferred embodiment of the present invention.

Fig. 2 is the sectional view along the first embodiment ink gun that is parallel to the horizontal straight line intercepting of sap cavity.

Fig. 3 is the schematic diagram of the chip arrangement mode on the wafer of expression first preferred embodiment that is used to illustrate liquid droplet ejecting head manufacture method of the present invention.

Fig. 4 is expression splits the bar shaped chip from wafer a schematic diagram.

Fig. 5 is the chip sectional view of the straight line A-A intercepting in Fig. 3.

Fig. 6 is the schematic diagram of the chip arrangement mode on the wafer of expression another example of being used to illustrate the first preferred embodiment manufacture method.

Fig. 7 is the schematic diagram of the chip arrangement mode on the silicon wafer of expression second preferred embodiment that is used to illustrate liquid droplet ejecting head manufacture method of the present invention.

Fig. 8 is the wafer cross-section figure that intercepts along the line B-B that Fig. 7 provides.

The schematic diagram of Fig. 9 bar shaped chip that to be expression split from the wafer of Fig. 7.

Figure 10 is the schematic diagram of the chip arrangement mode on the silicon wafer of expression the 3rd preferred embodiment that is used to illustrate liquid droplet ejecting head manufacture method of the present invention.

Figure 11 is the schematic diagram of the chip arrangement mode on the silicon wafer of expression the 4th preferred embodiment that is used to illustrate liquid droplet ejecting head manufacture method of the present invention.

Figure 12 is the enlarged drawing that expression constitutes the pattern of etching cut-off rule.

Figure 13 is the enlarged drawing that expression constitutes the another kind of pattern of etching cut-off rule.

Figure 14 is used for explaining at chip cutting apart the residual schematic diagram of generation wedge shape.

Figure 15 is the schematic diagram of the chip arrangement mode on the silicon wafer of expression the 5th preferred embodiment that is used to illustrate liquid droplet ejecting head manufacture method of the present invention.

Figure 16 is used to explain the silicon wafer sectional view that forms the method for etching cut-off rule in wafer.

Figure 17 is the silicon wafer sectional view that is used to explain another embodiment of the method that forms the etching cut-off rule in wafer.

Figure 18 is the schematic diagram of the 6th preferred embodiment of liquid droplet ejecting head manufacture method of the present invention.

Figure 19 is the three-dimensional exploded view of the ink gun of liquid droplet ejecting head second preferred embodiment of the present invention.

Figure 20 is the sectional view along the second preferred embodiment ink gun that is parallel to dividing plate straight line intercepting longitudinally.

Figure 21 is the sectional view along the second preferred embodiment ink gun that is parallel to the horizontal straight line intercepting of dividing plate.

Figure 22 is the perspective view of the ink gun of liquid droplet ejecting head the 3rd preferred embodiment of the present invention.

Figure 23 is the perspective view that the path of the ink gun of expression the 3rd preferred embodiment forms substrate.

Figure 24 is the perspective view of print cartridge of the present invention.

Figure 25 is the perspective view of the mechanical part of ink jet printing device of the present invention.

Figure 26 is the sectional view of the mechanical part of ink jet printing device of the present invention.

Figure 27 is the schematic diagram that is used to explain arrangements of chips traditional on the silicon wafer.

Figure 28 is the schematic diagram that shows the arrangements of chips on the wafer, is used for the 7th preferred embodiment of liquid droplet ejecting head manufacture method of the present invention is described.

Figure 29 is the schematic diagram that is used to explain the wafer dividing method of Figure 28.

Figure 30 is the schematic diagram that shows forming the chip layout on the wafer before the otch.

Figure 31 is the wafer cross-section figure that is used to illustrate the problem that occurs when carrying out chip under the state of Figure 30 cuts apart.

Figure 32 is the schematic diagram that shows forming the chip layout on the wafer before the otch.

Figure 33 is the view that is used to explain that the chip part that formed otch separates from wafer.

Figure 34 is the chip schematic diagram that is used to explain the width of otch.

Figure 35 is the chip sectional view that is used to explain the length of otch.

Figure 36 is the schematic diagram that shows the chip layout on the wafer, is used for the 8th preferred embodiment of liquid droplet ejecting head manufacture method of the present invention is described.

Figure 37 is the wafer cross-section figure along the intercepting of the straight line A-A shown in Figure 36.

Figure 38 is the schematic diagram that shows the notch portion on the wafer, is used to explain the 9th preferred embodiment of liquid droplet ejecting head manufacture method of the present invention.

Figure 39 be when when carrying out etching from a side of substrate and form otch along the wafer cross-section figure of the intercepting of the B-B straight line shown in Figure 38.

Figure 40 be when when carrying out etching from the both sides of substrate and form otch along the wafer cross-section figure of the intercepting of the B-B straight line shown in Figure 38.

Figure 41 is the wafer cross-section figure that is used to explain the formation method of otch.

Figure 42 is the figure that shows the chip layout on the wafer, is used for the tenth preferred embodiment of liquid droplet ejecting head manufacture method of the present invention is described.

Figure 43 is the enlarged drawing that is equivalent to the chip of a die size in the wafer of Figure 42.

Figure 44 is the schematic diagram that shows the chip layout on the wafer, is used for the 11 preferred embodiment of liquid droplet ejecting head manufacture method of the present invention is described.

Figure 45 is the enlarged drawing that is equivalent to the chip of a die size in the wafer of Figure 44.

Figure 46 is as the enlarged drawing distortion of embodiment shown in Figure 44, that be equivalent to the chip of single-chip size in the wafer.

Figure 47 is as the enlarged drawing distortion of embodiment shown in Figure 44, that be equivalent to the chip of single-chip size in the wafer.

Figure 48 is the sectional view when the groove of the silicon wafer that uses (100) crystal orientation.

Figure 49 is transversely the sectional view of groove among Figure 45 when using the silicon wafer in (110) crystal orientation.

Figure 50 is the schematic diagram that is used to illustrate the pattern that obtains by anisotropic etching.

Figure 51 is the schematic diagram that is used to explain first example when having arranged the pattern of two parallelogram.

Figure 52 is the schematic diagram that is used to explain second example when having arranged the pattern of two parallelogram.

Figure 53 represents to be used to illustrate the chip layout viewing on the wafer of the 12 preferred embodiment of ink droplet jet method for making head of the present invention.

Figure 54 represents to be used to explain from a side and carries out the wafer cross-section figure that anisotropic etching forms the example of the pattern that constitutes cut-off rule.

Figure 55 represents to be used to explain and carries out the wafer cross-section figure that anisotropic etching forms the example of the pattern that constitutes cut-off rule from both sides.

Figure 56 represents to be used to explain and carries out the wafer cross-section figure that anisotropic etching forms another example of the pattern that constitutes cut-off rule from both sides.

Figure 57 is the flow chart that is used to illustrate first example of manufacture method, and this moment, chip structure and another substrate were bonded together.

Figure 58 is the flow chart that is used to illustrate second example of manufacture method, and this moment, chip structure and another substrate were bonded together.

Figure 59 is the flow chart that is used to illustrate the 3rd example of manufacture method, and this moment, chip structure and another substrate were bonded together.

Figure 60 is the three-dimensional exploded view of the ink gun of liquid droplet ejecting head the 4th preferred embodiment of the present invention.

Figure 61 is the sectional view along the ink gun of the 4th preferred embodiment of the straight line intercepting parallel with the dividing plate longitudinal direction.

The specific embodiment

Now with reference to figure explanation first preferred embodiment of the present invention.

At first, with reference to Fig. 1 and Fig. 2 the ink gun of first preferred embodiment of liquid droplet ejecting head of the present invention is described.

Fig. 1 represents the ink gun of present embodiment.Fig. 2 is that the ink gun of present embodiment is along the sectional view that is parallel to the intercepting of the horizontal straight line of sap cavity.

The ink gun of this embodiment comprises that path forms substrate 1 (sap cavity substrate), and it is that a sap cavity that is formed by monocrystalline silicon forms element, and this sap cavity formation element serves as chip structure.

This ink gun comprises dividing plate 2 that engages with the bottom surface of path formation substrate 1 and the nozzle plate 3 that engages with the end face of path formation substrate 1.

This ink gun comprises public sap cavity 8 from inks to pressurization sap cavity 6 that supply with, and this pressurization sap cavity 6 is the paths (ink sap cavity) that are connected with the nozzle 5 that sprays ink droplet, and has formed and pass the providing ink path as choked flow pressurization sap cavity 6 partly.In the outside of dividing plate 2 (sap cavity 6 one sides), for being provided with a drive unit and being bonded on the there with each pressurization sap cavity 6 corresponding piezoelectric device 12.Each piezoelectric device 12 is bonded on the base substrate 13.Along the periphery of piezoelectric device 12 sequences, there is a spacer element 14 to be bonded on the base substrate 13.

In addition, between piezoelectric device 12, arranged post element 15 as piezoelectric device.Piezoelectric device 12 is by alternately piling up piezoelectric material layer and internal electrode forms.

In the present embodiment, can adopt the combining structure of the ink in the pressurization sap cavity 6 being pressurizeed by the displacement that utilizes on the d33 direction, wherein the d33 direction is the piezo-electric effect direction of piezoelectric device 12.And, also can adopt the combining structure of the ink in the pressurization sap cavity 6 being pressurizeed by the displacement that utilizes on the d31 direction, wherein the d31 direction is the piezo-electric effect direction of piezoelectric device 12.

Path formation substrate 1 is to use alkaline etching liquid that the monocrystalline substrate with crystal orientation (110) is carried out anisotropic etching and forms, and wherein alkaline etching liquid is the etching solution such as potassium hydroxide (KOH) aqueous solution.On substrate 1, form through hole and realize each pressurization sap cavity 6, and the formation through hole is realized public sap cavity 8 on substrate 1.Each pressurization sap cavity 6 is divided by partition wall and is come.

Dividing plate 2 is formed by the nickel metallic plate, and by electroplating forming method production.Nozzle plate 3 is preparations like this, forms the nozzle 5 with 10-30 micron diameter corresponding to each pressurization sap cavity 6, and by adhesive it is bonded on the passage formation substrate 1.

Can use such as the such metallic combination of stainless steel and nickel steel, metal with such as the combination of the such resin of polyimide resin film or silicones, or other comprises the combination of these materials, can be as the raw material of nozzle plate 3.

And, in order to guarantee the water-resistance of ink, use known method on nozzle side (the ejection side surface on the injection direction), to form waterproof membrane, for example use plating, coating or waterproofing agent painting method.

In the ink gun of present embodiment, when the pulsed drive voltage of 20-50V optionally was applied on the piezoelectric device 12, this piezoelectric device 12 was subjected to displacement on stacking direction.Dividing plate 2 also will be subjected to displacement on the direction of nozzle 5, thereby by the variation of the volume of pressurization sap cavity 6 ink of pressurization in the sap cavity 6 is pressurizeed, so that ejection in the drops out from nozzles 5.

Along with the ejection of ink droplet, the fluid power in the pressurization sap cavity 6 descends, and according to the inertia that this moment, ink flowed, has produced certain negative pressure in pressurization sap cavity 6.

Transfer closed condition to by the voltage that will impose on piezoelectric device 12, dividing plate 2 turns back to initial position and pressurization sap cavity 6 returns to original shape, thereby has further produced negative pressure.

At this moment, ink has been full of pressurization sap cavity 6 from advancing ink passage by the providing ink path, and this providing ink path is public sap cavity and choked flow part.

Then,, apply pulsed drive voltage to piezoelectric device 12 in the ink meniscus oscillations of nozzle 5 and then after having stablized, carrying out ink droplet jet next time, thus ejection in the drops out from nozzles 5.

Adopt manufacture method of the present invention and can produce path to form substrate 1, this path forms substrate 1 and comprises the sap cavity 6 that forms in the ink gun and the silicon substrate of public sap cavity 8.

Provide first preferred embodiment of the manufacture method of liquid droplet ejecting head of the present invention below to Fig. 5 with reference to Fig. 3.

In order to explain the manufacture method of present embodiment, Fig. 3 has provided the chip arrangement mode on a kind of silicon wafer 20.The path that chip 21 in the wafer 20 of Fig. 3 has constituted ink gun above-mentioned forms substrate 1.Fig. 4 represents to split the bar shaped chip from wafer 20.Fig. 5 is the chip sectional view of the straight line A-A intercepting in Fig. 3.

In the present embodiment, used the silicon wafer 20 in (100) crystal orientation.As shown in Figure 3, chip 21 cut-off rule transversely is the etching cut-off rule 22 that is obtained by anisotropic etching, and vertical cut-off rule that with dashed lines provides among Fig. 3 is the cutting cut-off rule 23 that obtains by cutting.

As shown in Figure 5, on silicon wafer 20, be formed with the etching protective layer 24 such as silica and silicon nitride, and it is to use photoetching technique to form pattern according to the shape of etching cut-off rule, and will be removed at last.

The pattern of etching cut-off rule 22 and silicon wafer＜110〉direction forms with paralleling.

Then, use the akaline liquid such as potassium hydroxide (KOH) aqueous solution, TMAH (the tetramethyl-ammonium aqueous solution), EDP (ethylene diamine pyrocatechol) or lithium hydroxide (LiOH) that etching protective layer 24 is etched opening.

In this case, in the anisotropic etching that the silicon wafer that uses akaline liquid to (100) crystal orientation carries out, formed the wedge-shaped surface 25 that becomes 54.7 degree angles with wafer surface with (111) direction.

When two wedge-shaped surface 25 are met, formed V-shaped groove, and etching will be proceeded no longer.

The degree of depth of V-shaped groove is that the width by figure line is predetermined, and need it be designed according to the quantity of the thickness of wafer and required nubbin.

By cutting, produced the bar shaped chip 26 shown in Fig. 4 along 23 pairs of wafers 20 of cutting cut-off rule (having formed etching cut-off rule 22 on it) vertical with etching cut-off rule 22.

Owing to formed etching cut-off rule 22, just can realize the fracture of bar shaped chip 26 by stress application, so, can like a cork bar shaped chip 26 be divided into independent chip 21.

According to present embodiment, in Fig. 3 and Fig. 4, wafer is divided into chip 21 in the vertical by cutting.Thereby the precision of chip edge can be remained on higher degree, so can make the precision when chip being navigated on the other parts of joining remain on higher degree with chip.

And, that the cross section of chip can not become wedge shape but vertical, thus in the location breaking of chip can not taken place.

Have, wafer transversely is divided into chip by being etched in again, and this free degree that makes chip arrange on wafer is increased, and the quantity of the chip of producing from wafer is more than the traditional chip arrangement mode shown in Figure 27.

And, use bar shaped chip 26 can easily realize the fracture in alignment, thereby prevented the destruction of for example when using wafer to rupture, being caused, thereby output is improved with etching cut-off rule 22.

A kind of method that obtains the high speed ink jet printing device is the quantity that increases the nozzle of ink gun, thereby because the increase of nozzle quantity will be configured to chip of ink-jet head elongated shape.

Under the situation of this rectangular dies, as shown in Figure 6, wish to use etching to cut apart according to the direction of the minor face of chip 21, and use cutting to cut apart according to the direction on the long limit of chip 21 by cutting cut-off rule 23 by etching cut-off rule 22.

When by cutting it being become the bar shaped chip, etching cut-off rule 22 has been formed on the minor face of chip 21, thereby can finish fracture like a cork.Output is improved thereby chip can be damaged hardly.

And, when navigating to rectangular dies 21 on other parts, if chip vertically on position, then precision can be remained higher degree.

Therefore, cut apart wafer, the precision of cut-off rule can be remained on the higher degree, and cross section also is vertical, thereby precision is remained on the higher degree by on the direction on the long limit of chip, using cutting.

Next, second preferred embodiment of the manufacture method of liquid droplet ejecting head of the present invention is introduced to Fig. 9 with reference to Fig. 7.

In order to explain the manufacture method of present embodiment, Fig. 7 has provided the chip arrangement mode on a kind of silicon wafer 30.Fig. 8 is the wafer cross-section figure that intercepts along the line B-B that Fig. 7 provides.Fig. 9 represents the bar shaped chip that splits from the wafer of Fig. 7.

In the present embodiment, used the silicon wafer 30 in (100) crystal orientation.

As shown in Figure 7, the silicon wafer 30 in (110) crystal orientation＜formed etching cut-off rule 32 on 112〉direction.

In the silicon wafer 30 in (110) crystal orientation, by＜112〉pattern of direction can form the face (111) perpendicular to wafer side.

Therefore, if stop etching unlike the silicon wafer in (100) crystal orientation is etched to V-shaped groove, and prolong etching period, the etching cut-off rule will penetrate the bottom of wafer.

Therefore, by＜112〉form etching cut-off rule 32 on the direction, can do the width of etching cut-off rule 32 very little, thereby can effectively utilize the area of wafer.

And as shown in Figure 7 and Figure 8, etching cut-off rule 32 is formed into intermittent line.

Even the etching cut-off rule has penetrated the side of wafer in this way, also can form bridge joint 33 and maintain between the chip 21.

Carried out having obtained bar shaped chip 36 and wafer being divided into each chip 21 after the cutting by fracture is also taken place the bridge joint stress application between the chip 21.

In addition, at the back of wafer 30, still remain with etch-resisting film 24 in the office, breakthrough portion.

Because thickness is tens nanometer-about 2 microns, be out of question so reach the chip degree that maintains the original state.

After having formed etching cut-off rule 32 by anisotropic etching, etch-resisting film 24 need be removed, when the etch-resisting film 24 in remaining in opening is broken, such problem can appear: can produce particle in fracture.

And, under the situation of the wafer that uses (110) crystal orientation, because the etching on the straight line is shaped as parallelogram and the hexagons with 70.5 degree angles or 54.7 degree angles, has intersection perpendicular to＜112 so can't form〉the etching cut-off rule of the direction of direction.

Though intersecting perpendicular to＜112〉when forming the etching cut-off rule on the direction of direction, little pattern can be arranged formation in order, in this case, the edge of chip still can form zigzag.

Then, because the etching cut-off rule is＜112〉form on the direction, on this direction, obtained straight line by etching, and the cutting be on the direction vertical, to cut apart with＜112〉direction, so formed chip edge has enough accuracy here.

And, in ink gun, forming sap cavity point-blank to high-density in order to make, it is effectively that the silicon substrate in utilization (110) crystal orientation is vertically formed the sap cavity partition wall.

In order to be vertically formed the partition wall of sap cavity, the direction that sap cavity makes straight flange and silicon wafer＜112〉direction identical, form it, and perpendicular to＜112〉arrange many sap cavities on the direction of direction.

Thereby chip form becomes long limit perpendicular to＜112〉rectangular shape on the direction of direction.

According to present embodiment, because the direction of chip straight flange is split by cutting, the edge on the long limit of resulting chip can have enough precision, and can with other components bonding, clamping or the like, and can position with enough precision.

Have, in the silicon wafer that uses (110) crystal orientation, the width of chip cut-off rule can be made infinitely smallly in theory again.

But, if produced bubble when carrying out anisotropic etching, and these bubbles are trapped in the narrow and small groove, and etching solution just again can't enter groove and suffer, thereby etching can't be proceeded.

In order in groove, not to be detained bubble,, wish that it is 3 microns or bigger with regard to the width of chip cut-off rule 32.

Apply hyperacoustic mechanical device and forcibly displace minute bubbles in the narrow groove by in etching process, using, also can realize etching to narrower groove, and accelerated the circulation of liquid in groove, thereby in this case, 1 micron or also be acceptable greater than 1 micron groove.

Below, with reference to Figure 10 the 3rd preferred embodiment of liquid droplet ejecting head manufacture method of the present invention is described.

In order to explain the manufacture method of present embodiment, Figure 10 has provided the chip arrangement mode on a kind of silicon wafer 30.

In the present embodiment, wafer is cut apart up hill and dale, and is to carry out realizing separation along the etching cut-off rule that forms by etching after the cutting that the cutting cut-off rule is cut apart it.In other words, the bridging part of being mentioned in second preferred embodiment in front 34 is to be positioned at etching cut-off rule 32 and the intersection point place of cutting cut-off rule 33.

When having finished cutting, chip 31 is divided when cutting off from wafer, the bridge joint on the etching cut-off rule 32 has also cut off together by cutting, thereby cuts apart also and finished fully when cutting when having finished chip.

In the present embodiment, bridge joint 34 has the narrow desired width of width than cutting cut-off rule 33, and owing to can not produce the residual of bridge joint 34 in chip 31 edges by cutting, so the manufacture method of present embodiment can prevent that residual the causing owing to bridge joint produces particle on chip in subsequent technique.

Below, with reference to Figure 11 the 4th preferred embodiment of the manufacture method of liquid droplet ejecting head of the present invention is described.

In order to explain the manufacture method of present embodiment, Figure 11 provides the chip arrangement mode on a kind of silicon wafer 30.

Similarly, in the present embodiment, wafer is thoroughly to separate, and carried out cutting with it after the cutting cut-off rule is cut apart, finish separation along the etching cut-off rule that forms by etching.Chip 21 is to arrange in the mode of one group of chip alignment of the first direction that is parallel to silicon wafer 30, thereby first cut-off rule 32 of adjacent chips row staggers on the direction that is parallel to second cut-off rule 33.

Like this, owing to can not become long straight line by this arrangement mode etching cut-off rule 32, the hardness of wafer increases can to prevent etching cut-off rule 32 to form afterwards, prevents to transport in the process owing to by the etching cut-off rule fracture taking place and wafer being damaged at wafer.

In this case, not all adjacent chip alignment all must stagger fully, but it is just enough according to wafer hardness, chip form or chip size the arrangements of chips mode to be carried out suitable design.

Below, the relation between etching cut-off rule 32 and the cutting cut-off rule 33 is described to Figure 14 with reference to Figure 12.

Figure 12 is the enlarged drawing of the bridging part 28 among Figure 10, and Figure 13 is the enlarged drawing of the bridging part 28 among Figure 11.

Under the situation in silicon wafer (110) crystal orientation, as Figure 12 or shown in Figure 13, etching is shaped as parallelogram or hexagon.

Becoming parallelogram still is the shape that hexagon depends on employed etching mask.

(111) wedge-shaped surface 40 of direction appears at the end, represent with hacures in Figure 12 and Figure 13, and the thickness T of the length of each wedge-shaped surface 40 and silicon wafer is proportional Biao Shi Wei  T.

Silicon wafer is penetrated by etching in 41 part.

In Figure 12 and Figure 13, dotted line represents to cut cut-off rule 33, and the width of this cutting cut-off rule 33 changes between width B and width C, depends on the width of cutting tool.

The width B of given cutting cut-off rule 33 and width C are only given an example with making comparisons among Figure 12 and Figure 13, and are not limited to shown width.

When the width of cutting cut-off rule 33 when equaling " B ", cut apart on the chip periphery of finishing not can residual wedge-shaped surface 40 any part.Yet, when the width of cutting cut-off rule 33 equals " C ", on the edge of cutting apart the chip of finishing, can leave the wedge shape residual 42 of the wedge-shaped surface 40 shown in Figure 14.

Because these wedge shapes residual 42 have been served as the cusp edge of chip 21, therefore might in following one technology, damage and may produce particle chip.

Whether will leave wedge shape residual 42 is to be determined by the thickness T of wafer and the thickness of cutting tool.

The thickness of wafer is not to get according to neither destroying the condition that design and wafer do not destroy chip yet, but almost can not freely select.

Then, with reference to Figure 15 the 5th preferred embodiment of the manufacture method of liquid droplet ejecting head of the present invention is described.

In the present embodiment, etching cut-off rule 32 is to extend to the chip 21 that is adjacent and form.

By doing like this, in the processing of back, do not have to prevent that chip from being damaged, and can not produce particle because the wedge shape that cutting produces is residual.

Because etching cut-off rule 32 is extended to the chip of adjacency, so also can in adjacent chip 21, form the piece that digs of etching cut-off rule 32, even so, chip 21 is being used as under the situation of ink gun, its periphery or precision, this not can become problem.

And in the interrupted cutting that wafer is carried out, as selectable scheme, cutting tool carries out the high speed rotation, and can cut away a part in wafer side, because cutter is circular, so the straight length of the cut surface of wafer upper and lower surface is different.

When using interrupted cutting to form the etching cut-off rule of present embodiment, enter the chip of adjacency by a part that makes cut-off rule, can eliminate the gap between the sideline, cutting face of upper and lower surface of wafer.

Below, with reference to Figure 16 the formation method of the etching cut-off rule of wafer is described.

Figure 16 is used to explain the silicon wafer sectional view that forms the method for etching cut-off rule in wafer.

Lozenges 40 is formed on two ends, the left and right sides, and Figure 16 this moment (a) expression is to form by carrying out etching from a side of wafer 30 along cross section and the etching cut-off rule 32 of the straight line C-C of Figure 12.

On the other hand, Figure 16 (b) expression has been carried out patterning, from both sides wafer 30 carried out etching and formed the situation of etching cut-off rule 32 its both sides resistant layer 24.

Owing to become by carry out etching from both sides and dug the degree of depth that obtains deeply up to penetrating wafer 30, so carry out once etching partially enough from a side, therefore the length of wedge-like portion 40 has become half, and there is not the wedge shape shown in Figure 14 residual 42, the residual remnants of wedge shape in the processing of back can be prevented, and particle can not be produced.

In this case,, then can proceed the etching of lozenges if after both sides are converged each other, further carry out etching at lozenges, thereby as shown in figure 17, the also complete obiteration of final wedge-like portion 40.

Below, with reference to Figure 18 the 6th preferred embodiment of the manufacture method of liquid droplet ejecting head of the present invention is described.

This figure is the cross-sectional view along the array direction of the sap cavity of wafer, and for an easy chip part that shows on the wafer.

In the present embodiment, be devoted to form etching cut-off rule 32 simultaneously and shortened processing procedure, owing to sap cavity 6, public sap cavity 8 etc. form by anisotropic etching by formation sap cavity 6 and public sap cavity 8.

Shown in Figure 18 (a), will be formed on as the silicon nitride of resistant layer 24a and 24b on the both sides of silicon wafer 30 in (110) crystal orientation.

Shown in Figure 18 (b), on the top, carry out the patterning of resistant layer 24a by photoetching process and dry ecthing according to the shape of sap cavity pattern 52, public sap cavity pattern and etching cut-off rule 53.

Shown in Figure 18 (c), adopt to use the same method according to the shape of sap cavity pattern 54, public sap cavity pattern and etching cut-off rule pattern 55 and carry out the patterning of resistant layer 24b in the bottom.

This moment is in order to have carried out the IR location in the pattern and the position of duplicating on the top.

Then, under 80 degrees centigrade temperature, use the potassium hydroxide aqueous solution of 35wt% to carry out anisotropic etching.

At this moment, owing to used the silicon wafer in (110) crystal orientation, shown in Figure 18 (d), digging piece is that in the vertical direction forms.

If further proceed etching, will penetrate wafer, and shown in Figure 18 (e), will form sap cavity 6, public sap cavity and etching cut-off rule 32.

Like this, by forming the pattern of etching cut-off rule simultaneously with sap cavity and public sap cavity, and carry out etching simultaneously, when forming sap cavity and public sap cavity, the etching cut-off rule has also synchronously formed, can under the situation of the special disposal that does not need to be used to form the etching cut-off rule, produce like this, thereby can reduce cost.

In the present embodiment, though cross section is vertical, the straight line precision is fine and proposed cutting as an example as the dividing method with enough positioning accuracies, but shot blastinog, scroll saw, water are sprayed or the like and all be can be used as the dividing method of realizing all or part of advantage.

And, though with the alternative example of anisotropic etching as the method for formation cut-off rule in the part of wafer side, and use anisotropic etching can form narrow groove with enough accuracy, though this is suitable, but as other optional method that forms cut-off rule, the water laser method that can also use laser to pass, but also can use any method in isotropic etching, shot blastinog, interrupted cutting, laser treatment and the water column method.

Below, describe with reference to Figure 19 to 21 pair of second preferred embodiment as the ink gun of liquid droplet ejecting head of the present invention.

Figure 19 is the three-dimensional exploded view of the ink gun of present embodiment.Figure 20 is the sectional view along the ink gun of the present embodiment of the intercepting of straight line longitudinally that is parallel to dividing plate.Figure 21 is the sectional view along the ink gun of the present embodiment of the horizontal straight line intercepting that is parallel to dividing plate.

The ink gun of present embodiment comprises that the sap cavity that is equipped with as path substrate 61 forms element (first substrate).

It is a stacked structure, engages with electrode substrate 63 in the mode of piling up as element, and as nozzle plate 64 preparations of the 3rd substrate top at path substrate 61.Electrode as second substrate forms the bottom of substrate preparation at path substrate 61.

Sap cavity 66 also is an ink via, and for these free paths have two or more nozzles 65, the free paths of 68 pairs of 66 formation from choked flow part 67 to sap cavity of public sap cavity are open.

In path substrate 61, be formed with and formed dividing plate 70 and formed partition wall of separating as the sunk part of the bottom of the surface of the wall of sap cavity 66 and this sap cavity 66 with each sap cavity 66 71 and the sunk part that forms public sap cavity 78.

In path substrate 71, on thickness (degree of depth) direction of the monocrystalline substrate (silicon wafer) in (100) crystal orientation, boron is spread as high density impurity, until being diffused into the thickness consistent with dividing plate, and utilize the high density boron-dopped layer to carry out anisotropic etching as etch stop layer, when the sunk part that formed as sap cavity 66, just obtained having the dividing plate 70 of desired thickness.

Except top said boron, can also use gallium, aluminium or the like as high density p type impurity.

And, in the high density boron-dopped layer, except boron, can on the basis of boron, comprise the germanium that has greater than the lattice paprmeter of silicon again, can reduce tensile stress thus.

And, can also use silicon-on-insulator (SOI) substrate that bulk substrate and active layer is bonded together by oxidation film as path substrate 71.

In this case, on bulk substrate, cut out sunk part, make it become bulk substrate, and the active layer substrate is used as dividing plate 70 with sap cavity 66 and public sap cavity 68.

In electrode substrate 63, formed sunk part 74, keep predetermined air gap 76 between electrode 75 and the dividing plate 70, and electrode 75 partners with dividing plate 70, electrode 75 is formed in the bottom of sunk part 74, and under the effect of electrostatic force, dividing plate 70 becomes actuation part, thereby variation has taken place the volume of the combination sap cavity 66 by electrode 75 and dividing plate 70.

In order to prevent that electrode 75 from contacting with the dividing plate 70 of electrode 75 tops that are positioned at electrode substrate 73 and it is caused damage, formed thickness and be 0.1 micron insulating barrier 77, for example SiO ₂Layer.

Be formed with electrode pad 75a, it is used for installing electrode 75 near the end of electrode substrate 73, and is formed with the jockey that electrode pad 75a is connected with external drive circuit.

Electrode substrate 63 only forms electrode 75 in sunk part 74, sunk part 74 obtains by carry out etching with HF aqueous solution etc. on glass substrate or monocrystalline substrate, on substrate surface, be formed with heat oxide film 63a, in sunk part 74, barrier film use such as sputter, CVD and the vacuum evaporation forms technology and forms the barrier film with high heat resistance with the electrode material desired thickness, for example titanium nitride forms photoresist layer afterwards again and carries out etching.

Use such as positive plate engages and directly engages such method, and electrode substrate 63 and path substrate 61 are bonded together.

The mixed polysilicon film of refractory metal, such as metal material, double-layer structure for example, for example, tungsten skin covering of the surface and polysilicon film, or gold and aluminium, Cr, nickel, material and Ti, TiN and alloy that this class is used always in production process of semiconductor device can both be used for electrode 75.

In this example, by being etched in the sunk part with 0.4 micrometer depth 74 that forms in the silicon substrate, electrode 75 is that the sputter by titanium nitride reaches 0.1 micron thickness and forms, and to form thickness thereon be that 0.1 micron sputter coating is as insulating barrier 77.

Therefore, in this stature, the length (interval between dividing plate 70 and the insulating barrier 77) of air gap 76 is 0.2 micron after electrode substrate 63 and path substrate 61 are bonded together.

And, on nozzle plate 64, be formed with and be used for from the outside to as the groove of the nozzle 65 of choked flow part 67 and the ink delivery port 79 of public sap cavity 68 supply inks, and on ejection side, be provided with waterproof coating.

Because this nozzle plate 66 has the double-decker of metal level, so can use metal for example, metal electroplating film, silicon substrate and SUS, resin and zirconia of for example making or the like by the nickel electrocasting.

Nozzle plate 64 is bonded together by adhesive and path substrate 61.Like this, ink gun is just made in the manner described above and has been finished.

By use dividing plate 70 as public electrode, electrode 75 as absolute electrode, and between dividing plate 70 and electrode 75, alternately apply driving voltage by drive IC (drive circuit).

Under the effect of the electrostatic force that produces between dividing plate 70 and the electrode 75, dividing plate 70 is at the line displacement of going forward side by side that deforms on a side of electrode 75, and under this state, discharge (driving voltage is set to 0) dividing plate 70 recovery that deforms by effect to electric charge between dividing plate 70 and the electrode 75.

Variation has taken place in the volume of sap cavity 66 (volume)/pressure, thereby makes drop from nozzle 65 ejections.

Below, with reference to Figure 22 and Figure 23 the ink gun of the 3rd preferred embodiment of liquid droplet ejecting head of the present invention is described.

Figure 22 represents an ink gun, and it is the 3rd preferred embodiment of liquid droplet ejecting head of the present invention.Figure 23 represents that the path of the ink gun of present embodiment forms substrate.

The ink gun of present embodiment comprises: first substrate 81, and it is that path forms element (sap cavity formation element); With second substrate 82, it is the heating element heater substrate, is arranged on the bottom of first substrate 81.

Also be formed with public sap cavity path 88, pressurization sap cavity path 86 and nozzle 84, public sap cavity path 88 is supplied with ink for pressurization sap cavity path 86, and pressurization sap cavity path 86 is fluid paths, is connected with each nozzle 84 to spray ink droplet.

Ink is that the ink delivery port 90 from first substrate 81 adds, and through public sap cavity path 88 and pressurization sap cavity path 86 from nozzle 84 to drip the shape ejection.

For each chip unit, on silicon wafer, first substrate 81 that forms element as path is formed with nozzle 84, pressurization sap cavity 86 and public sap cavity 88, and by cutting and etching these component chips is separated.

Public electrode 92 and absolute electrode 93 are used for applying driving voltage on heat release resistance (electrothermal conversioning element) 91, and this heat release resistance 91 is formed in second substrate 82.

Like this, in the ink gun of present embodiment, by alternately applying driving voltage to absolute electrode 93, heat release resistance 91 produces heat, produces the China ink bubble, and the pressure variation has taken place, thereby utilize the pressure of the ink in the pressurization sap cavity path 86 to change, from nozzle 84, spray ink droplet.

Below, with reference to Figure 24 print cartridge of the present invention is described.Figure 24 represents according to print cartridge of the present invention.

In the print cartridge 100 of Figure 24, for the China ink jars 103 of ink gun 102 ink supply and the ink gun of the present invention 102 with the nozzle 101 that is used to spray ink droplet integrally form as one.

Like this, under the situation of present embodiment, the product defects of ink gun will bring defective directly for whole print cartridge.According to present embodiment, owing to reduced the residual of smear metal, can realize tiny ink droplet jet, and the output of print cartridge is improved, and can realizes the low-cost production of print cartridge.

Below, describe with reference to Figure 25 and 26 pairs of examples that the ink jet printing device of ink gun is housed, wherein ink gun is a liquid droplet ejecting head of the present invention.

Figure 25 is the perspective view of mechanical part of the ink jet printing device of present embodiment.Figure 26 is the sectional view of the mechanical part of this ink jet printing device.

The ink jet printing device of present embodiment comprises main part 111, and print machinery device part 112 is arranged at wherein.In this print machinery device part 112, be provided with: for the print cartridge of ink gun ink supply, mobile stool on the main scanning direction, constitute by ink gun of the present invention and be arranged at printhead on the carrier.

In the bottom of main part 111, the paper feeding box (or paper pallet) 114 of several the printing papers 113 of can packing into therein can freely insert or extract from front end.Manual paper feed tray 115 is installed in rotation on the leading flank, and by using this craft paper feed tray 115, printing paper 113 manually can be supplied with printhead.

When being placed on printing paper 113 in the paper feeding box 114 or on the manual paper feed tray 115 time, printing paper 113 is sent into print machinery device part 112 from pallet 114 or 115, print thereby on printing paper 113, carry out image by print machinery device part 112.After this, printing paper 113 is transported on the paper discharge tray 116 on the rear side surface that is assemblied in PRN device 111.

In the print machinery device part 112,, be equipped with flatly the main guide rod 121 that intersects with left side plate and from guide rod 122 as guiding elements.Carrier 123 remains on (with the direction of Figure 26 quadrature) on the main scanning direction by guiding elements 121 and 122.

Be arranged on printhead 124 on the carrier 123 and comprise ink gun, and these ink guns spray yellow (Y), cyan (C) and black (Bk) ink droplet respectively according to liquid droplet ejecting head of the present invention.The inkjet nozzle that is used for every kind of color is arranged in the direction that intersects with main scanning direction, and the direction that the directional steering of ink droplet jet is downward.

And carrier 123 is equipped with each independent print cartridge 125, is used to printhead 124 to supply with versicolor ink.With each print cartridge 125 install can be with this print cartridge 125 of new replacing ink cartridge.

Each print cartridge 125 comprises the air inlet that communicates with atmosphere that is positioned at its top, be positioned at its top to the ink supply outlet of ink gun ink supply and wherein be full of the porosity of ink.

In addition, used the printhead 124 of the ink gun that has four kinds of colors in the present embodiment, used single printhead with the nozzle that sprays the shades of colour ink droplet but also can change into.

Carrier 123 is installed in the rear side (downstream one side of printing paper carriage direction) of the main guide rod 121 that is positioned at rear end part movably, and is installed in the rear side from guide rod 122 (downstream one side of printing paper carriage direction) that is positioned at fore-end movably.

In order on main scanning direction, to carry out the motion scan of carrier 123, between driving pulley 128 and driven pulley 129, be equipped with Timing Belt 130, under the driving of scan module 127, be rotated driving thus.Timing Belt 130 is contained on the carrier 123, thereby has realized the bi-directional drive of carrier 123 by forward and reverse rotation of scan module 127.

On the other hand, be sent to the lower end of printhead 124 in order to be contained in printing paper 113 in the paper feeding box 114, assembled from paper feeding box 114 and printing paper 113 to have been separated and the preposition roller 136 of the angle that feed rollers 131, the guiding piece that transports channeling conduct 133 to printing paper 113, the counter-rotating of sending into and the conveying roller 134 of supplying with printing paper 113, given printing paper 113 are sent from conveying roller 135 and conveying roller 135.

Under the driving of paper pushing motor 137, conveying roller 134 is rotated driving by gear train.

Print jack part 139 is arranged on the corresponding position of successive range with the main scanning direction of carrier 123.Print jack part 139 is guiding elements of printing paper 113, by this print jack part 139, printing paper 113 is sent and by the lower end clamping of record head 124 from conveying roller 134.

In order on throughput direction, to send printing paper 113, on the printing paper throughput direction,, be provided with and conveying roller 141 and backing roll 142 common exit roller 143 and the backing rolls 144 that use in the downstream of print jack part 139, be rotated driving by them.And,, arranged the guiding piece 145 and 146 that forms the transport path of printing paper for printing paper 113 is passed out on the paper discharge tray 116.

When printing, carrier 123 moves by driving according to picture signal, be ejected on the printing paper page 113 at ink on the print position, and a line record of image thereon, after the conveying of having carried out scheduled volume, next bar line is recorded on the printing paper 113 then.

Arrived the signal of print area by receiving printing finished signal or printing paper 113 rear ends, printing stops and printing paper 113 is sent.

In this case, because the controllability of the ink gun of the present invention of formation printhead 124 is improved ink droplet jet and make the character fluctuation obtain inhibition, so its character is stable and can carries out record to the picture of high picture quality.

And, separating on the position of the end of the right-hand member of carrier 123 moving directions with posting field, disposed the gathering-device 147 of the bad injection that is used to remedy printhead 124.

Gathering-device 147 has covering device, absorption plant and cleaning device.

During printing standby, printhead 124 moves to gathering-device 147 1 sides, and the use covering device carries out the covering to carrier 123 in printhead 124, thereby has prevented because the dry and hard bad injection that causes of ink by discharge section being remained moist state.

And, by during printing, carrying out and printing irrelevant ink injection, can revise the ink viscosity of all nozzles, thereby keep stable performance.

When bad injection takes place, seal up with the discharge section (nozzle) of covering device printhead 124, use absorption plant by internal pipeline with bubble etc. with ink sucking-off from discharge section, remove by cleaning device attached to the ink on the discharge end face, dust or the like, thereby make bad injection recover normal.

And, with the ink collection that gets off of absorb to according in the useless black holder (not shown) of the bottom of main part, and this absorption to preserve be that ink absorber by useless black holder carries out.

Like this, because the low-cost ink gun of being realized by the present invention has been installed, therefore can realize the low-cost production of PRN device in this ink jet printing device.

Below, describe with reference to the 7th preferred embodiment of the manufacture method of Figure 28 and 29 pairs of liquid droplet ejecting heads of the present invention.

The 7th preferred embodiment for the manufacture method of explaining liquid droplet ejecting head of the present invention has provided the chip arrangement mode on the silicon wafer 220 in Figure 28.Figure 29 is the schematic diagram that is used to explain the dividing method of bar shaped chip from the silicon wafer 220.

Present embodiment is to provide by the example under the situation of the silicon wafer 220 that uses (100) crystal orientation.

In Figure 28, be to constitute like this: by at horizontal partition line 222 with vertically silicon wafer 220 cut apart on the position of cut-off rule 223 and can obtain two or more bar shaped chips 221.

In this case, it can be regarded as such layout: the chip of at least 1 sequence (two row about being in the drawings) of a cut-off rule (vertically cut-off rule 223) and the sequence of identical chips 221 move with the cut-off rule (horizontal partition line 222) of opposite side with paralleling and are other chip sequence, and make its formation thus.

In the present embodiment, on the part of the cut-off rule 222 of the longitudinal direction of silicon wafer 220, formed the otch 224 that penetrates silicon wafer 220 by laser etc.

In addition, in Figure 28, cut-off rule 222 and otch 224 are like that overlapping as shown in the figure, and this is in order to illustrate the position of otch 224.

As shown in figure 29, interrupted cutting is by cutting apart with horizontal partition line 222 corresponding cutting cut-off rules 225 (thick line), and cuts cut-off rules 226 (dotted line) accordingly by cutting and vertical cut-off rule 23 silicon wafer 220 is cut apart.

Because cutting tool can be mentioned or fall to interrupted cutting on any position of wafer, therefore by on the position of opening 224, lifting cutting tool, shown in the arrow among Figure 29 227, fall cutter like that again, can realize the cutting of cutting tool along cutting cut-off rule 225.

And in cutting (logging) layout, the chip of at least 1 sequence of a cut-off rule and the sequence of identical chips move with the cut-off rule of opposite side with paralleling and are other chip sequence, according to the present embodiment shown in Figure 28, and it constitutes other chip sequence thus.

Owing to cut apart by cutting in the vertical, as shown in figure 29, so the precision of chip edge can be fine, and when positioning with other and the contacted parts of chip, chip can make precision also become fine, and can increase the quantity of chip.

And, because cross section can not become taper, but vertical, therefore in the location, can rupture hardly.

Have, owing to vertically cut apart by laser cut and interrupted cutting, so the free degree of chip array becomes very big, thereby will produce than the more chip of traditional array shown in Figure 27 again.

Below, describe with reference to Figure 30 to 35 pair of form that is formed on the otch 224 on the cut-off rule.

Figure 30 represents that chip cuts apart the layout of pattern (cutting pattern), and wherein under the state before forming otch, structure is moved along the direction of the cut-off rule of Figure 28.

In cutting, use the cutting tool of the circle that has diamond abrasive grain usually.

Otch 224 is not to form under the situation that the wafer of the topological chip plan that has Figure 28 is cut of the circular cutter of the sort of use as shown in Figure 30.Figure 31 is the cross section enlarged drawing that is used for the layout of Figure 30 is carried out the wafer that problem that chip occurs when cutting apart describes.

The part 230 that marks with hacures among Figure 31 is not cut cutter 231 and scales off fully, and will be retained on the chip 221A.

When wanting by cutting part 230 to be scaled off fully, cutter 231 will enter within the scope of chip 221A, thereby this chip 221A will become bad chips owing to this situation.

The end face of chip can not become straight line, and when the edge of wanting to make this chip contacts when going forward side by side row alignment, thereby when if the back is divided into 221B and 221C by fracture with part 230 (hacures), precision will reduce.

Therefore, by otch 224 being opened, as shown in figure 23, chip 221B and 221C can be separated fully, and can not make chip 221A degradation at the intersection point place of horizontal partition line 222 and vertical cut-off rule 223.

When the chip 221B to Figure 32 cuts, and during separating chips, as shown in figure 33, in the end 232 of chip 221B surface height difference WL has appearred.

Cause owing to the fluctuation of the dimensional tolerance of change in size in forming otch 224 manufacture processes or cutter 231 during the generation of surface height difference WL, and the width W k of the width W of otch 224 and cutting tool 231 and frequently must be identical, as shown in figure 34.

When the difference of the width W k of the width W of otch 224 and cutting tool 231 was excessive, difference in height may change a lot, and can not guarantee alignment precision.Sometimes the defective in the time of may causing assembling.

According to the present invention, confirmed, if the defective when the poor absolute value between the width W k of the width W of otch 224 and cutting tool 231 less than 0.5mm (if or difference in height WL be 0.5mm or littler), can guarantee alignment precision so and can reduce assembling.

Like this,, make the size complete unity of the chip after cutting apart by the difference in height WL of limited chip end face, the simple and easy location that can realize chip, thus the cost during encapsulation can reduce.

Below, when making badly, if the length of otch 224 is too short as fruit chip 221A, in the time will cutting apart by cutting or fracture, situation about can not cut apart fully then might occur, chip 221B and 221C can not become straight line, and can not improve alignment precision.

So, as shown in figure 35, supposing that r represents the radius of cutting tool, t represents the thickness of chip, and ideal situation is that the length L of otch 224 satisfies following formula (1)

$\sqrt{r^2-{(r-t)}^2}\≤L---\left(1\right)$

Therefore, if incision length L is limited according to formula (1), bridging part can also not remain on the chip after cutting apart.Chip arrangement mode by present embodiment can access easy and high-precision aligning, and can realize processing and manufacturing cheaply.

Below, with reference to Figure 36 and Figure 37 the 8th preferred embodiment of the manufacture method of liquid droplet ejecting head of the present invention is described.

In order to explain the manufacture method of present embodiment, Figure 36 has provided a kind of chip arrangement mode.Figure 37 is the sectional view along the wafer of the intercepting of the straight line A-A shown in Figure 36.

In the present embodiment, otch 224 silicon wafer 240 that is to use (110) crystal orientation by on the silicon wafer 240 in (110) crystal orientation＜carry out that etching forms on 112〉direction.

In the silicon wafer 240 in (110) crystal orientation, if the crystal face vertical with wafer side (111) is by＜112〉pattern of direction and prolong that etching period forms, then otch will be penetrated into the bottom of wafer.

Therefore, by＜112〉form otch on the direction, the width dimensions of otch 224 can form enough precision by etching, can control obtaining enough precision the relation between kerf width W and the cutter width W k, and control difference in height WL can further obtain sufficient precision.

In the wafer in (110) crystal orientation, etch structures has become the parallelogram with 54.7 degree angles or 70.5 degree angles.Intersecting on the vertical directions and can't form hexagonal otch point-blank with＜112〉direction.

Though intersecting perpendicular to＜112〉can arrange little pattern in order when forming otch on the direction and form, the edge of chip will become zigzag.

So, because otch is＜112〉form on the direction, wherein by etching with along perpendicular to＜112〉the direction cutting and separating of direction obtains straight line, so the chip edge that forms has enough precision.

Below, with reference to Figure 38 to 41 to the silicon wafer in (110) crystal orientation＜method that forms otch on 112〉direction describes.

Figure 38 represents to be used to illustrate the notch portion on the wafer of manufacture method of the 9th preferred embodiment of the present invention.Figure 39 is the sectional view along the wafer when carrying out etching formation otch from a side of wafer of the straight line B-B intercepting that provides among Figure 38.Figure 40 is the sectional view along the wafer when carrying out etching formation otch from the both sides of wafer of the straight line B-B intercepting that provides among Figure 38.Figure 41 is the sectional view of wafer that is used to explain the formation method of otch.

As Figure 38 and shown in Figure 39, when having formed resistant layer 242b and having had the resistant layer 242a of the opening that is used to form otch on the whole surface at the silicon wafer 240 in (110) crystal orientation, carry out etching by a side from wafer, formed otch 224, formed wedge-like portion 241 at two ends, the left and right sides.

Then, as shown in figure 40, by carrying out the patterning of resistant layer 242a, obtained being used to form the opening of otch, carry out etching from the both sides of wafer 240, and in these openings, form otch and continue etching up to penetrating wafer 240, just in time be half degree of depth when a side is carried out etching, so the length of wedge-like portion 241 also becomes half.

Have again, continue to carry out after wedge-like portion 241 intersects, then the etching of wedge-like portion 241 is proceeded from both sides if be etched in, and as shown in figure 41, final wedge-like portion 241 complete obiterations.The result does not have destructive wedge shape residual, and can not produce particle in subsequent handling.

Below, with reference to Figure 42 and Figure 43 the tenth preferred embodiment of the manufacture method of liquid droplet ejecting head of the present invention is described.

Figure 42 represents to be used to explain the chip arrangement mode of the manufacture method of present embodiment.Figure 43 is the enlarged drawing that is equivalent to the chip of a die size in the wafer 320 of Figure 42.

In the present embodiment, the chip arrangement mode of design is eight chips (structure) 3211 at path substrate 1 on the silicon wafer 320.Between chip 321, be formed with narrow groove 322.

Narrow groove 322 is to form by anisotropic etching when forming public sap cavity 8 (or 68) and sap cavity 6 (or 66).

In this case, owing to having formed the high density diffused layer of boron in order to form dividing plate 2 (or 70), as previously described, then narrow groove 322 will can not penetrate silicon wafer 320, but only stay the thickness of dividing plate 2.

And narrow groove 322 forms discontinuously, and chip 321 maintains by discontinuous part (bridge joint) 323, and can not disconnect.

In addition, the width of discontinuous part 323 is width that are used to guarantee width that chip do not disconnect with chip, do not disconnect with wafer or the like.

Chip cut-off rule 324 is made of the pattern and the discontinuous part 323 of these narrow grooves 322 of neatly putting.

Therefore, owing to be connected on the bridge joint 323 along chip cut-off rule 324 between each chip 321, so just it can be divided into each independently chip 321 by slight work done.

Though narrow groove 322 has been left over the part that not penetrate identical with dividing plate 2 thickness, because very thin of the thickness of the part left over, so be easy to realize separating.

And, if make well width narrower,, also need not penetrate again groove 322 although become the shape of V-shaped groove.

At this moment, become very for a short time by the remainder (=(thickness)-(the V-shaped groove degree of depth)) that makes V-shaped groove, just can do very little merit and it has been separated.

Can regulate the residual thickness of V-shaped groove by well width.

And, when the formation that does not make slot part stops and do not penetrate in V-shaped groove, just there is no need to make groove 322 to become interrupted shape.

Like this, by forming narrow groove between each chip, to the silicon wafer stress application chip being separated, the smear metal when having avoided cutting is adhered to.

In this case, different with the when cutting institute tiny smear metal that produces, owing to the issuable a small amount of chip that ruptures of bridge joint when cutting apart chip is relatively large, so after chip is cut apart, can be removed by cleaning.

And, do not increase such as hydraulic pressure and the such external force of vacuum chuck, and, owing to cutting belt or the like has no longer needed, so output is improved.

Below, with reference to Figure 44 and Figure 45 the 11 preferred embodiment of the manufacture method of liquid droplet ejecting head of the present invention is described.

Figure 44 represents to be used to illustrate the chip layout viewing on the wafer 330 of manufacture method of present embodiment.Figure 45 is the enlarged drawing that is equivalent to the chip of a die size in the wafer 330 of Figure 44.

Use the silicon substrate (silicon wafer 30) in (110) crystal orientation to form path substrate 1.

Owing to used the substrate in (110) crystal orientation, public sap cavity 8 can not intersect with parallelogram, and the crystal face that the length direction among the figure can be not plane intersects, so sap cavity 6 forms zigzag fashion.

And in the anisotropic etching of the substrate in (110) crystal orientation, by carrying out patterning, it is vertical that the partition wall between the sap cavity 6 becomes, thereby can form sap cavity 6 to high-density.

In the present embodiment, between chip 331, the groove 332a and the 332b that are shaped as parallelogram (pattern) have been formed.

In the drawings, because the groove 332a of transverse direction (＜112〉direction) and sap cavity 6 in the same way, have formed elongated groove in vertical direction (111).

Discontinuous part (bridge joint) 333a between this groove 332a and each groove 332a has constituted chip cut-off rule 334a.

On the other hand, because longitudinal direction (＜111〉direction) is inconsistent with the crystal orientation among the figure, so can not form vertical slots.

So discharging has formed groove (pattern) 332b of little parallelogram in order, chip cut-off rule 334b comprises the discontinuous part between groove 332b and each groove 332b.

In this case, if the pattern of parallelogram is too small, the wedge shape of (111) face will intersect V-shaped groove and make etch-stop, and the thickness that therefore must consider silicon wafer decides the size of parallelogram groove 332b.

In addition, about constituting chip cut-off rule 334a and the groove 332a of 334b and the shape of 332b, be not limited to example shown in Figure 45, as shown in figure 46, the direction of parallelogram also can form the direction towards an opposite side, that is the opposite direction of the parallelogram pattern of sap cavity 6 among Figure 45.

As shown in figure 47, can flute profile not become parallelogram, but form it into the groove that flat shape is hexagon (pattern).

Cut-off rule 334a and the 334b quantity of the chip obtained in wafer of detailed rules and regulations more are many more, and the width of cut- off rule 334a and 334b is thin more good more.

When using the silicon wafer in (100) crystal orientation this moment, the sectional view of the wafer thickness direction of the groove of formation cut-off rule as shown in figure 48.

In addition, on the top of wafer and lower surface, all be formed with the etching mask layer 325 that comprises silica or silicon nitride or the like.

In this silicon wafer, formed (111) face wedge shapes of θ=54.7 degree by anisotropic etching, and at the local etch-stop of wedge shape contact.

Under the contacted situation of wedge shape, the pass of digging between deep degree T and the groove width L is L= T, thickness be the wafer of A can penetrate the time desired groove width be at least LPLQ= A.

And, wish to stay a spot of wafer thickness b and under the situation about wafer not being penetrated, groove width L is  (A-b), and it can be remained higher degree.

And when using the silicon wafer in (110) crystal orientation, the sectional view of the wafer thickness direction of the cannelure 332a among Figure 45 as shown in figure 49.

(110) wafer in crystal orientation forms the vertical wall of (111) face, and groove width can be made infinitely smallly in theory.

But, if produced bubble and these gas bubble blockage in narrow groove inside when carrying out anisotropic etching, etching solution can't be applied in the groove, thereby etching can't be proceeded.

In order to prevent that bubble from entering in the groove, need groove to have 3 microns or above width.

And, when having used when in groove, applying the means that ultrasonic wave discharges with the bubble that forces in the groove, be that 1 micron or above groove also can carry out etching to groove width.

The groove 332b that constitutes the cut-off rule 334b on the longitudinal direction (＜111〉direction) when on the other hand, using the silicon wafer in (110) crystal orientation among Figure 45 can not resemble and form transversely the groove 332a.

So, the constituted mode that detailed description is made the cut-off rule 334b on the longitudinal direction attenuate below.

At first, in the silicon wafer in (110) crystal orientation, also form oblique wedge shape.

Carrying out anisotropic etching by the silicon wafer to (110) crystal orientation has obtained as Figure 50 (a) and hexagon pattern as shown in two types parallelogram (c) and Figure 50 (b).

In addition, different combinations is carried out in the both sides among the figure can also form the different quadrangle in both sides, trapezoidal or pentagon, omit explanation here them.

Figure 50 represents three kinds of shapes when V-shaped groove forms the same degree of depth.

Shown in Figure 50 (a) is the parallelogram with 70.5 degree angles, and its width is minimum among them, and this width is made as W0.

Therefore, be arranged in order and form cut-off rule 334b by parallelogram groove (pattern) 332b that will have 70.5 degree angles with minimum widith L.

Then, with reference to Figure 51 first example of the configuration relation of two parallelogram when vertically arranging the groove of parallelogram pattern and constituting cut-off rule is described.

In this example, the height H of parallelogram pattern 332b is made forr a short time than the pitch P of parallelogram pattern 332b array.

In order to make two parallelogram pattern 332b can access the local shape that connects by bridge joint 333b, must there be the overlapped range delta of parallelogram pattern 32b.

Obviously as can be seen, smallest partition line width L is for shown in following formula (2) when having determined etch depth T from Figure 51:

$L=\sqrt{3}T+\frac{\mathrm{\Δ}}{2}---\left(2\right)$

For what wafer is penetrated will do only is to make etch depth T greater than wafer thickness.

And the height H of parallelogram pattern is determined by following formula:

$P=\sqrt{6}T-\frac{\sqrt{2}}{2}\mathrm{\Δ}---\left(3\right)$

The width t of bridge joint can at random determine according to required intensity.Ideal situation is guaranteeing in the wafer transportation or having enough intensity in the etching post processing, separate easily when chip separates and effectively utilize under the prerequisite of chip area, to guarantee that the width t of bridge joint tries one's best greatly.And rational situation is to make width t less than the width of cutting apart of cutting apart the chip method cutting commonly used.

Therefore, the width t of bridge joint is that the length Δ of 1-50 micron and bridge joint is the 0.5-100 micron.Best, width t is the 5-30 micron, and the length Δ is the 2-50 micron.

Though except width t also comprises wedge shape (111) face, needs consider that the influence of wedge shape decides the design load of bridge joint.

The height H of parallelogram pattern is

Arrive

Best, this highly is

Arrive

Below, with reference to Figure 52 at the groove of arranged vertical parallelogram pattern and second example of the configuration relation of two parallelogram when constituting cut-off rule describe.

This example is to make the height H of parallelogram pattern 332b than the big situation of pitch P of the array of parallelogram pattern.

Obviously as can be seen, the smallest partition line width L when having determined etch depth T is for shown in following formula (4) from Figure 52:

$L=\sqrt{3}T+\frac{\mathrm{\Δ}}{2}---\left(4\right)$

For what wafer is penetrated will do only is to make etch depth T greater than wafer thickness.

And the height H of parallelogram pattern 32b is determined by following formula (5):

$P=\sqrt{6}T-\frac{\sqrt{2}}{2}\mathrm{\Δ}---\left(5\right)$

As previously described, the width t of bridge joint can at random determine according to required intensity.Ideal situation is guaranteeing in the wafer transportation or having enough intensity in the etching post processing, separate easily when chip separates and effectively utilize under the prerequisite of chip area, to guarantee that the width t of bridge joint tries one's best greatly.And ideal situation is to make width t less than the width of cutting apart of cutting apart the chip method cutting commonly used.

Therefore, the width t of bridge joint is that the length ε of 1-50 micron and bridge joint is the 0.5-100 micron.Best, width t is the 5-30 micron, and length ε is the 2-50 micron.

By this aligning method, cut-off rule width L can be made than first example Δ only.

Δ is approximately equal to width t, and the height H of parallelogram pattern is Arrive Best, this highly is

Arrive

Below, with reference to Figure 53 the 12 embodiment of the manufacture method of liquid droplet ejecting head of the present invention is described.

Figure 53 represents to be used to illustrate the layout viewing of the chip on the wafer of manufacture method of present embodiment.

By alternately constituting chip 331, present embodiment makes the quantity of the chip of obtaining from a wafer surpass the example of Figure 44.

In other words,, can improve the free degree that the chip on the wafer is arranged, and compare, can from the wafer of identical size, obtain two chips more with the dividing method of the inseparable cutting of straight cut-off rule by using chip cut-off rule 334a recited above and 334b.

And, in this case,, vertically also can adopt cutting to separate owing to be straight line vertically.

In the operation of back, when the edge that uses chip positions, have excellent precision on the edge direction of cutting apart by cutting, because vertically cut-off rule has adopted etching, make that the quantity of resulting chip is maximum.

Below, carry out etched example with reference to Figure 54 and 55 pairs of both sides and describe from silicon wafer.

In addition, each figure is the sectional view on the wafer thickness direction of silicon wafer.Figure 54 represents to carry out from a side example of the pattern of the formed formation cut-off rule of etching.

At this moment, when the silicon substrate that has used (100) crystal orientation and wedge angle θ used the silicon substrates of 54.7 degree and (110) crystal orientation, θ became 35.3 degree.

On the other hand, Figure 55 represents the example by the etching mask patterns 328 of carrying out etching formation formation cut-off rule from both sides.

If etching be carry out from both sides the time, wafer will be dug deeply to penetrating, its degree of depth will be half when single face carries out etching.

Therefore, groove width M2 also is half of groove width M1, thereby can make the cut-off rule width narrower.

In this case, if after intersect at two ends, proceed etching, will begin wedge shape is carried out etching, and opening will become greatly (Figure 55 (b)) in wedge shape.

At last, wedge shape complete obiteration (Figure 55 (c)).

Along with the disappearance of wedge shape, the bridge joint 333b that is connected between the chip becomes narrower, thereby it becomes and is more prone to cut apart.

And shown in Figure 56, on the one side of wafer among the etching mask patterns 328a of (on the end face) and Figure 55 is same.

If the etching mask patterns 328b on the opposite side (bottom surface) is formed to such an extent that do not purchase pattern corresponding to bridge joint, then use these mask patterns 328a and 328b to carry out etching.

The most more easily obtain bridge joint thickness so, thereby be more prone to realize cutting apart of chip than substrate (wafer) 330 thin thickness.

Below, the situation that path substrate 1 and another electrode substrate 2 grades are piled up describes.

First method is, silicon wafer (substrate) is carried out anisotropic etching, forms the chip cut-off rule when forming sap cavity and public sap cavity, along the chip cut-off rule chip that obtains is cut apart, will be cut apart to chip afterwards and engage with electrode substrate etc. separately, shown in Figure 57.

If do not do like this, also can use from both sides etching chip cut-off rule method of patterning, thereby cut-off rule can be made the narrower chip area that effectively utilizes.

Shown in Figure 58, second method is that silicon wafer (substrate) is carried out anisotropic etching, forms the chip cut-off rule in sap cavity that forms each chip and public sap cavity.The substrate that itself and other is had wafer size engages, for example electrode substrate and nozzle plate, and it is not divided into each chip.

Electrode substrate and nozzle substrate can be by such as the such metal of nickel, SUS, make such as the such pottery of aluminium oxide or such as the such glass of pyrex (Pyrex) (registration mark).

In this case, this to pile up the structure that forms by kinds of materials very difficult though cut simultaneously, because silicon substrate contains the cut-off rule that is only connected by bridge joint, so when cutting other substrate, silicon substrate is easy to separate.

Below, as the third method, shown in Figure 59, the substrate that at first silicon substrate and other is had wafer size engages, and for example electrode substrate, nozzle plate or the like are carrying out etching to it then.Carry out chip and cut apart by being formed on chip cut-off rule on the silicon wafer then.

Because above-mentioned first and second methods are handled after etching, so its intensity step-down, and according to the third method, etching is carried out after engaging, because etching is carried out piling up substrate, so obtained reducing owing to handling the strong destruction to intensity of causing.

Below, describe with reference to the ink gun of the 4th preferred embodiment of Figure 60 and 61 pairs of liquid droplet ejecting heads of the present invention.

Figure 60 represents the ink gun of present embodiment, and Figure 61 represents that the ink gun of present embodiment is along the sectional view that is parallel to horizontal straight line intercepting.

The path that forms this ink gun forms substrate 341 and is formed by monocrystalline substrate (sap cavity substrate).

It has and is bonded on path and forms the dividing plate 342 on the bottom surface of substrate 341 and be bonded on path and form nozzle plate 343 on substrate 341 end faces.

Be formed with the free path that public sap cavity 348 and pressurization sap cavity 346 constitute by the ink supply path 347 as the choked flow part, wherein public sap cavity 348 carries out pressurization sap cavity 345 ink supply of the path (ink sap cavity) of the nozzle 345 that ink droplet sprays to conduct.

In the outside of dividing plate 342 (sap cavity 346 1 sides), for being provided with a drive unit and being bonded on the there with each pressurization sap cavity 346 corresponding piezoelectric device 352.Lamination-type piezoelectric device 352 is bonded on the base substrate 353.Around piezoelectric device 352 row, spacer member 354 is bonded on the base substrate 353.

Piezoelectric device 352 alternately piles up piezoelectric and internal electrode and forms.

In this case, it can be regarded as such combining structure: utilize the displacement on the piezoelectricity direction d33 direction of piezoelectric device 352 that the inks in the pressurization sap cavity 346 are pressurizeed.Can be such combining structure also: utilize the displacement on the piezoelectricity direction d31 direction of piezoelectric device 352 that the inks in the pressurization sap cavity 346 are pressurizeed.

Be formed for from the outside to the ink entrance 349 of public sap cavity 348 ink supply in base substrate 353 and the interval 354.

And the use epoxy is that resin or polyphenylene sulphite carry out injection molding in the bottom end marginal portion of dividing plate 342, formed the bonding joint of a framework 357 that path forms the periphery of substrate 341, and a framework 357 and base substrate 353 be to use adhesive etc. fixed to one another, and this part is not shown herein.

Though a framework 357 has been divided into two parts, it also can be made of a part.

Have again, in order to provide the driving signal, will be used for applying the drive circuit (drive IC) 359 that drives ripple respectively by solder joints, ACF (Anisotropically conductive film) joint or wire-bonded and be installed in FPC cable 358 to each piezoelectric device 352 to piezoelectric device 352.

It is to utilize to form by the monocrystalline substrate in (110) crystal orientation is carried out anisotropic etching such as the such alkaline etching liquid of potassium hydroxide aqueous solution that path forms substrate 341, and form through hole respectively as each pressurization sap cavity 346, as the groove in ink supply path 347 and the through hole that is used as public sap cavity 348.

In this case, each pressurization sap cavity 346 is separated by partition wall.

Dividing plate 342 is formed by the nickel metallic plate, and by electroplating forming method manufacturing.

Nozzle plate 342 has formed the nozzle 345 with 10-30 micron diameter corresponding to each pressurization sap cavity 346, and carries out adhesive bond with path substrate 341.

Can use such as stainless steel and nickel steel such metal composites, metal and the resin such as polyimide resin film, silicon and by the material that these compositions are formed and make nozzle plate 343.

And, in order to ensure the waterproof of ink, utilize the such known method of plating coating or waterproof coating on nozzle side (surface: be formed with waterproof membrane the ejection side of injection direction).

Like this, in the ink gun that is constituted, by apply the driving pulse voltage of 20-50V respectively to piezoelectric device 352, the piezoelectric device 352 that has been applied in pulse voltage is subjected to displacement on stacking direction, dividing plate 342 changes on the direction of nozzle 345, volume/Volume Changes by pressurization sap cavity 346 is exerted pressure to the ink in the pressurization sap cavity 346, thereby nozzle 345 has been finished the injection (injection) of ink droplet.

And along with the injection of ink droplet, the hydraulic pressure in the pressurization sap cavity 346 reduces, and according to the inertia that this moment, ink flowed, has produced certain negative pressure in pressurization sap cavity 346.

Owing to make it enter closed condition by applying voltage to piezoelectric device 352, dividing plate 342 returns to initial position and pressurization sap cavity 346 returns to original shape, so negative pressure further produces.

At this moment, ink charges into pressurization sap cavity 346 from ink entrance 349 through public sap cavity 348 with as choked flow ink supply path 347 partly.

Then, after the ink meniscus of nozzle 345 vibration takes place and then stablized, apply pulsed drive voltage to piezoelectric device 352, carrying out ink droplet jet next time, thus the ejection ink droplet.

In this case, identical with foregoing first embodiment, the sap cavity 346 of formation path formation substrate 341, public sap cavity 348 or the like in silicon wafer, form small polygon pattern groove at each chip chamber by anisotropic etching, constitute the chip cut-off rule by forming these grooves in order, and formed the formation of cutting apart of substrate by each chip cut-off rule path.

In the above-described embodiment, liquid droplet ejecting head is introduced as representative example with ink gun, but the present invention is except ink gun, can also use as other liquid droplet ejecting head, for example liquid resist is sprayed and be the liquid droplet ejecting head of drop for the liquid droplet ejecting head of drop with the dna sample injection.

As indicated above, liquid droplet ejecting head of the present invention comprises one by cutting apart the head member chip that silicon wafer forms, and this silicon wafer has cross one another first direction and second direction.This chip comprises: one first cut-off rule, be parallel to this first direction of this silicon wafer, and this chip is cut apart on by a kind of first dividing method along this first cut-off rule from this silicon wafer; With one second cut-off rule, be parallel to this second direction of this silicon wafer, this chip is cut apart on by a kind of second dividing method along this second cut-off rule from this silicon wafer.

In liquid droplet ejecting head of the present invention, this chip is cut apart from wafer by etching along this first cut-off rule, and cuts apart from this wafer by cutting along this second cut-off rule.

In liquid droplet ejecting head of the present invention, this chip is constituted as rectangular shape, its have parallel with this second cut-off rule vertically, the cutting of cutting apart this chip from this wafer is carried out along this second cut-off rule, with parallel with this first cut-off rule laterally, the etching of cutting apart this chip from this wafer is carried out along this first cut-off rule.

And in liquid droplet ejecting head of the present invention, this silicon wafer is (110) crystal orientation, and this chip is formed by this silicon wafer, and by this first cut-off rule that etching is cut apart this chip from this silicon wafer be parallel to this silicon wafer＜112〉direction.

And, in liquid droplet ejecting head of the present invention, comprise: one provides the sap cavity formation element of sap cavity, nozzle formation element, electrode forming element that electrode is provided that provides nozzle, and this chip forms at least, and this sap cavity forms element, this nozzle forms one of element and this electrode forming element.

Have, in liquid droplet ejecting head of the present invention, this chip is not provided with any bridging part at the intersection point place of this first cut-off rule and this second cut-off rule again.

The manufacture method of liquid droplet ejecting head of the present invention comprises step: first cut-off rule along this first direction that is parallel to this silicon wafer carries out etching to this silicon wafer, along this first cut-off rule a plurality of chips are cut apart each other; With second cut-off rule this silicon wafer is cut, to cut apart a plurality of these chips along this first and second cut-off rule from this silicon wafer along this second direction that is parallel to this silicon wafer.

In manufacture method of the present invention, each of these a plurality of chips is constituted as rectangular shape, its have parallel with this second cut-off rule vertically, this chip is cut apart from this silicon wafer by cutting step on this direction, with parallel with this first cut-off rule laterally, this chip is cut apart from this silicon wafer by etching step on this direction.

In manufacture method of the present invention, this silicon wafer is (110) crystal orientation, these a plurality of chips that constitute with rectangular shape are arranged in this silicon wafer, and be used for by this first cut-off rule that etching step is cut apart this chip from this silicon wafer be parallel to this silicon wafer＜112〉direction.

In manufacture method of the present invention, be used for being set to 1 micron or bigger by the width that etching step is cut apart this first cut-off rule of these a plurality of chips from this silicon wafer.

The manufacture method of liquid droplet ejecting head of the present invention comprises step: first cut-off rule along this first direction that is parallel to this silicon wafer carries out etching to this silicon wafer, to cut apart a plurality of chips along this first cut-off rule from this silicon wafer; With second cut-off rule this silicon wafer is cut, to cut apart a plurality of these chips along this first and second cut-off rule from this silicon wafer along this second direction that is parallel to this silicon wafer.In this manufacture method, this etching step so carries out: after this etching step each independently chip do not separate fully, and this cutting step so carries out: after this cutting step, each independently chip separated fully.

In manufacture method of the present invention, these a plurality of arrangements of chips are become the one group chip alignment parallel with this first direction of this silicon wafer, thereby this first cut-off rule of the adjacent column of this chip staggers on the direction that is parallel to this second cut-off rule.

In manufacture method of the present invention, this second cut-off rule is set to: this of one of these a plurality of chips second cut-off rule has in this silicon wafer even as big as the width within the scope of the adjacent chips that is stretched over one of these a plurality of chips.

And in manufacture method of the present invention, these a plurality of chips are cut apart from this silicon wafer, and the intersection point place between this first cut-off rule and this second cut-off rule is without any bridging part.

In manufacture method of the present invention, carry out this etching step by carrying out etching from the end face of this silicon wafer and bottom surface simultaneously, in this silicon wafer, to form this first cut-off rule.

In manufacture method of the present invention, in the structure that forms the head member chip, carry out etching step, to form this first cut-off rule in this silicon wafer by being etched in.

Microdevice of the present invention comprises one by cutting apart the chip that silicon wafer forms, and is provided with this silicon wafer identical with head member chip in the liquid droplet ejecting head of the present invention.In this microchip, first and second dividing methods differ from one another, and choose from processing and laser treatment are handled, sprayed water to cutting, etching, blasting treatment, scroll saw.

According to liquid droplet ejecting head of the present invention, the head member chip is by along first cut-off rule of this first direction that is parallel to this silicon wafer this silicon wafer being carried out etching and forming by along second cut-off rule of this second direction that is parallel to this silicon wafer this silicon wafer being cut silicon wafer cut apart.Can with the location easily of other parts.The free degree of arrangement chip is improved on silicon wafer, and the quantity of the chip that obtains from silicon wafer has obtained increase.Like this, improved output, and realized making cheaply.

According to the manufacture method of liquid droplet ejecting head of the present invention, the free degree of arrangement chip is improved on silicon wafer, and the quantity of the chip that obtains from silicon wafer obtained increase, has improved output, and has realized making cheaply.

According to microdevice of the present invention, this micromodule equipment has been installed a kind of liquid droplet ejecting head of the present invention, and the quantity of the chip that obtains from silicon wafer has obtained increase.Like this, improved output, and realized making cheaply.

According to ink gun of the present invention, this ink gun is set to a kind of liquid droplet ejecting head of the present invention, thereby the production efficiency of this ink gun can be improved, thereby has realized making cheaply.

According to print cartridge of the present invention, will form as one to the China ink jar of ink gun ink supply and the ink gun of injection ink droplet, and liquid droplet ejecting head of the present invention is set to ink gun.The production efficiency of this print cartridge can be improved, thereby has realized making cheaply.

According to ink jet printing device of the present invention, liquid droplet ejecting head of the present invention is set to spray the ink gun of ink droplet, thereby the production efficiency of this ink jet printing device can be improved, thereby has realized making cheaply.

Claims (17)

1. liquid droplet ejecting head comprises that described silicon wafer has a cross one another first direction and a second direction, it is characterized in that described chip comprises by cutting apart the head member chip that silicon wafer forms:

First cut-off rule is parallel to the described first direction of described silicon wafer, by a kind of first dividing method local otch that penetrates described silicon wafer that forms on described first cut-off rule, along described first cut-off rule described chip is cut apart from described silicon wafer; With

Second cut-off rule is parallel to the described second direction of described silicon wafer, described chip cut apart on by a kind of second dividing method along described second cut-off rule from described silicon wafer,

Wherein, described silicon wafer is (110) crystal orientation, and described chip is formed by this silicon wafer, and by described first cut-off rule that etching is cut apart described chip from the described silicon wafer be parallel to described silicon wafer＜112〉direction.

2. according to the described liquid droplet ejecting head of claim 1, it is characterized in that: described chip is to cut apart from wafer by interrupted cutting along described first cut-off rule, cuts apart from described wafer by cutting along described second cut-off rule then.

3. according to the described liquid droplet ejecting head of claim 1, it is characterized in that: described described chip after cutting apart comprises the end face with 0.5 micron or littler difference in height.

4. according to the described liquid droplet ejecting head of claim 1, it is characterized in that: described otch is configured satisfies following formula

$\sqrt{r^2-{(r-t)}^2}\≤L$

Wherein L is formed in the length of the otch in the described wafer, and r is the radius of cutting tool, and t is the thickness of described wafer.

5. according to the described liquid droplet ejecting head of claim 1, it is characterized in that: described otch is formed on described first cut-off rule partly by etching.

6. according to the described liquid droplet ejecting head of claim 1, it is characterized in that: described injector head comprises that one provides the sap cavity formation element of sap cavity, nozzle formation element, electrode forming element that electrode is provided that provides nozzle, and described chip forms at least, and described sap cavity forms element, described nozzle forms one of element and described electrode forming element.

7. the manufacture method of a liquid droplet ejecting head, described liquid droplet ejecting head comprise one described silicon wafer have cross one another first direction and second direction, it is characterized in that by cutting apart the head member chip that silicon wafer forms that this method comprises the following steps:

Form an otch partly on described first cut-off rule of the described first direction that is parallel to described silicon wafer, this otch penetrates described silicon wafer, along described first cut-off rule described chip is cut apart; With

Second cut-off rule along the described second direction that is parallel to described silicon wafer cuts described silicon wafer, cutting apart described chip from described silicon wafer along described first and second cut-off rules,

Wherein, described silicon wafer is (110) crystal orientation, and described chip is formed by this silicon wafer, and by described first cut-off rule that etching is cut apart described chip from the described silicon wafer be parallel to described silicon wafer＜112〉direction.

8. according to the described manufacture method of claim 7, it is characterized in that: described chip is to cut apart from wafer by interrupted cutting along described first cut-off rule, cuts apart from described wafer by cutting along described second cut-off rule then.

9. according to the described manufacture method of claim 8, it is characterized in that: described described chip after cutting apart comprises the end face with 0.5 micron or littler difference in height.

10. according to the described manufacture method of claim 7, it is characterized in that: described otch is configured satisfies following formula

$\sqrt{r^2{(r-t)}^2}\≤L$

Wherein L is formed in the length of the otch in the described wafer, and r is the radius of cutting tool, and t is the thickness of described wafer.

11. according to the described manufacture method of claim 7, it is characterized in that: described otch is formed on described first cut-off rule partly by etching.

12. manufacture method according to the described liquid droplet ejecting head of claim 7, it is characterized in that: described a plurality of arrangements of chips are become the one group chip alignment parallel with the described first direction of described silicon wafer, thereby described first cut-off rule of the described chip of adjacent column staggers on the direction that is parallel to described second cut-off rule.

13., it is characterized in that: when forming described head member chip structure, carry out in described silicon wafer, forming the described formation step of described otch according to the described manufacture method of claim 7.

14. a microdevice comprises one by cutting apart the chip that silicon wafer forms, described silicon wafer has a cross one another first direction and a second direction, it is characterized in that described chip comprises:

First cut-off rule is parallel to the described first direction of described silicon wafer, by a kind of first dividing method local otch that penetrates described silicon wafer that forms on described first cut-off rule, along described first cut-off rule described chip is cut apart from described silicon wafer; With

Second cut-off rule is parallel to the described second direction of described silicon wafer, described chip cut apart on by a kind of second dividing method along described second cut-off rule from described silicon wafer,

Wherein, described silicon wafer is (110) crystal orientation, and described chip is formed by this silicon wafer, and by described first cut-off rule that etching is cut apart described chip from the described silicon wafer be parallel to described silicon wafer＜112〉direction.

15. ink gun, comprise that the nozzle that sprays ink droplet, the sap cavity that is communicated with described nozzle and generation are used for the pressure generating unit to the ink pressurization that is contained in described sap cavity, described ink gun comprises by cutting apart the head member chip that silicon wafer forms, described silicon wafer has a cross one another first direction and a second direction, it is characterized in that described chip comprises:

First cut-off rule is parallel to the described first direction of described silicon wafer, by a kind of first dividing method local otch that penetrates described silicon wafer that forms on described first cut-off rule, along described first cut-off rule described chip is cut apart from described silicon wafer; With

Second cut-off rule is parallel to the described second direction of described silicon wafer, described chip cut apart on by a kind of second dividing method along described second cut-off rule from described silicon wafer,

Wherein, described silicon wafer is (110) crystal orientation, and described chip is formed by this silicon wafer, and by described first cut-off rule that etching is cut apart described chip from the described silicon wafer be parallel to described silicon wafer＜112〉direction.

16. print cartridge, wherein ink gun and China ink jar integrally form, described ink gun sprays ink droplet, and described China ink jar is to described ink gun ink supply, described ink gun comprises by cutting apart the head member chip that silicon wafer forms, described silicon wafer has a cross one another first direction and a second direction, it is characterized in that described chip comprises:

First cut-off rule is parallel to the described first direction of described silicon wafer, by a kind of first dividing method local otch that penetrates described silicon wafer that forms on described first cut-off rule, along described first cut-off rule described chip is cut apart from described silicon wafer; With

Second cut-off rule is parallel to the described second direction of described silicon wafer, described chip cut apart on by a kind of second dividing method along described second cut-off rule from described silicon wafer,

Wherein, described silicon wafer is (110) crystal orientation, and described chip is formed by this silicon wafer, and by described first cut-off rule that etching is cut apart described chip from the described silicon wafer be parallel to described silicon wafer＜112〉direction.

17. ink jet printing device, comprise the ink gun that sprays ink droplet, described ink gun comprises that described silicon wafer has a cross one another first direction and a second direction, it is characterized in that described chip comprises by cutting apart the head member chip that silicon wafer forms:

First cut-off rule is parallel to the described first direction of described silicon wafer, by a kind of first dividing method local otch that penetrates described silicon wafer that forms on described first cut-off rule, along described first cut-off rule described chip is cut apart from described silicon wafer; With

Second cut-off rule is parallel to the described second direction of described silicon wafer, described chip cut apart on by a kind of second dividing method along described second cut-off rule from described silicon wafer,

Wherein, described silicon wafer is (110) crystal orientation, and described chip is formed by this silicon wafer, and by described first cut-off rule that etching is cut apart described chip from the described silicon wafer be parallel to described silicon wafer＜112〉direction.

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