JP2003010757A - Injection cylinder for dispenser and pasty adhesive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection cylinder for a dispenser used when applying a pasty adhesive and the pasty adhesive. SOLUTION: This injection cylinder 1 for the dispenser consists of a cylinder 3, a nozzle cap 4 which is freely attachably and detachably attached to a nozzle section 33 formed at the cylinder 3, a head cap 5 which is freely attachably and detachably attached to the cylinder 3 and a piston 6 which is freely movably disposed within the cylinder 3. A needle-like projecting part 42 of the nozzle cap 4 closes a passage 34 of the nozzle section 33 of the cylinder 3 and the passage 34 of the nozzle section 33 of the cylinder 3 does not constitute a cavity by the needle-like projecting part 42 of the nozzle cap 4. A silver paste 2 is packed into the cylinder without allowing air or gas to exist in the cylinder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe for a dispenser and a paste-like adhesive used when applying the paste-like adhesive onto a lead frame, a ceramic substrate, a cavity or the like.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional syringe barrel 1 for a dispenser includes a cylinder 3 for containing a silver paste 2.
A nozzle cap 4 detachably attached to a nozzle portion 13 formed in the cylinder 3, a head cap 5 detachably attached to the cylinder 3, and a silver paste 2 movably arranged inside the cylinder 3 It consists of a piston 6.

However, in the conventional syringe barrel 1 for dispenser, the silver paste 2 filling the inside of the cylinder 3 is 3
It has a high viscosity of 00 to 3000 PS, and since the nozzle cap 4 only closes the tip of the nozzle portion 13 of the cylinder 3 as shown in FIG. Passage 13a consisting of pores
However, the passage 13a of the nozzle portion 13 of the cylinder 3 became a cavity in which air or gas was accumulated.

If the air or gas accumulated in the cavity of the passage 13a of the nozzle portion 13 formed in the cylinder 3 exists in the passage 13a of the nozzle portion 13 of the cylinder 3 as it is,
When using the silver paste 2, there is a problem that it causes blanking and impairs the uniformity and application workability of the silver paste 2. Therefore, after filling the inside of the cylinder 3 with the silver paste 2, some treatment is required. Apply to the nozzle part 13 of the cylinder 3
There was a problem in that the silver paste 2 had to be filled in the hollow portion of the passage 13a.

Further, after the passage 13a of the nozzle portion 13 of the cylinder 3 is filled with the silver paste 2, the silver paste 2 is cooled and stored to maintain its stability, the cohesive force generated during transportation, or returned to room temperature to obtain the silver paste 2. A pressure difference between the inside and the outside of the cylinder 3 is generated due to the expansion force generated when the cylinder 3 is used, and air or gas is supplied from the slight gap between the nozzle portion 13 of the cylinder 3 and the nozzle cap 3 to the silver paste 2 inside the cylinder 3. However, when the silver paste 2 is used, it causes blank ejection, and there is a problem that the uniformity of the silver paste 2 and the coating workability are impaired.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and the passage of the nozzle portion of the cylinder is not hollow, and the paste is formed without the presence of air or gas inside the cylinder. A dispenser that can be filled with an adhesive and does not mix air or gas into the paste-like adhesive that fills the inside of the cylinder, preventing blanking when using the paste-like adhesive and improving coating workability. To provide a syringe for use.

[0007]

A syringe barrel for a dispenser according to the present invention comprises a cylinder containing a paste adhesive,
A nozzle cap that is detachably attached to the nozzle portion formed on the cylinder, a head cap that is detachably attached to the cylinder, and a piston that is movably disposed inside the cylinder and that feeds the paste adhesive under pressure. The cap has a configuration characterized in that it has a closing portion that closes a passage for ejecting the paste adhesive at the nozzle portion of the cylinder.

The syringe barrel for a dispenser of the present invention is a needle-shaped projection portion in which the closing portion of the nozzle cap closes the passage of the nozzle portion of the cylinder.

In the syringe barrel for dispenser of the present invention, the cylinder has a nozzle cap mounting portion outside the nozzle portion, and the nozzle cap is fixed to the nozzle cap mounting portion of the cylinder.

In the syringe barrel for dispenser of the present invention, the nozzle cap is fixed to the nozzle cap mounting portion of the cylinder by screwing.

In the syringe barrel for dispenser of the present invention, the difference between the inner diameter of the nozzle portion of the cylinder and the outer diameter of the needle-like protrusion of the nozzle cap is 0.05 to 0.15 mm.

In the syringe barrel for a dispenser of the present invention, the head cap has a ventilation portion for eliminating a pressure difference between the inside and the outside of the cylinder.

In the syringe barrel for dispenser of the present invention, the cylinder has a cylindrical body, and the difference between the inner diameter of the cylindrical body of the cylinder and the outer diameter of the head of the piston is 0.1 mm or less.

In the syringe barrel for dispenser of the present invention, the paste adhesive is a silver paste for bonding the semiconductor element and the supporting substrate.

The paste-like adhesive of the present invention is characterized by being filled in the syringe barrel for a dispenser described above.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view of a main part of a syringe for a dispenser according to an embodiment of the present invention. As shown in FIG. 1, a syringe barrel 1 for a dispenser of the present invention includes a cylinder 3 for containing a silver paste 2 which is a paste adhesive, and a nozzle portion 3 formed on the cylinder 3.
3, a nozzle cap 4 which is detachably attached to the cylinder 3, a head cap 5 which is detachably attached to the cylinder 3, and a piston 6 which is movably arranged inside the cylinder 3 and for pumping the silver paste 2.

The nozzle cap 4 of the syringe barrel 1 for dispenser of the present invention has a needle-like protrusion 42 which serves as a closing portion for closing the passage 34 for ejecting the silver paste 2 of the nozzle portion 33 of the cylinder 3.

The cylinder 3 of the syringe barrel 1 for dispenser of the present invention has a nozzle cap mounting portion 35 outside the nozzle portion 33, and the nozzle cap 4 is fixed to the nozzle cap mounting portion 35 of the cylinder 3 by screwing. There is.

In the syringe barrel 1 for dispenser of the present invention, the difference between the inner diameter of the nozzle portion 33 of the cylinder 3 and the outer diameter of the needle-like protruding portion 42 of the nozzle cap 4 is 0.05 to 0.15.
mm.

The head cap 5 of the syringe barrel 1 for dispenser of the present invention has a ventilation portion for eliminating the pressure difference between the inside and the outside of the cylinder 3.

The cylinder 3 of the syringe barrel 1 for dispenser of the present invention has a cylindrical body 30, and the difference between the inner diameter of the cylindrical body 30 of the cylinder 3 and the outer diameter of the maximum portion of the head 60 of the piston 6 is zero. It is less than or equal to 1 mm.

The silver paste 2 bonds the semiconductor element and the supporting substrate.

FIG. 2 is a sectional view showing the cylinder of the syringe barrel for dispenser of the present invention. As shown in FIG. 2, the cylinder 3 has a cylindrical main body 30, and a flange 31 extending outwardly is provided at the upper end of the cylindrical main body 30 of the cylinder 3.
And the conical portion 32 is formed at the lower end of the cylindrical main body 30 of the cylinder 3.
A cylindrical nozzle portion 33 that projects downward on the same central axis is formed at the tip of the cylinder 3.
A passage 34 made of fine pores is formed in the inside of 3.

On the outside of the nozzle portion 33 of the cylinder 3, as shown in FIG. 2, a cylindrical nozzle cap attachment portion 35 protruding downward on the same central axis is formed, and the nozzle of the cylinder 3 is formed. Spiral protrusions 36 are formed on the inner peripheral surface of the cap mounting portion 35 at a constant pitch, and
As shown in FIG. 1, a plurality of reinforcing ribs 37 are radially formed between the outer peripheral surface of the nozzle portion 33 and the inner peripheral surface of the nozzle cap attachment portion 35.

FIG. 3 is a sectional view showing the nozzle cap of the syringe barrel for dispenser of the present invention. Nozzle cap 4
As shown in FIG. 3, the nozzle body 4 has a cap body 40, and a needle-shaped protrusion 42 protruding upward on the central axis is formed on an end wall 41 of the cap body 40 of the nozzle cap 4. Nozzle cap 4 cap body 40
Fitting wall 4 fitted to the outside of the nozzle portion 33 of the cylinder 3
The flange 44 of the nozzle cap 4 is formed at the end edge of the nozzle cap 3. The flange 44 of the nozzle cap 4 is provided at two positions symmetrical with respect to the center of the nozzle cap mounting portion 3 of the cylinder 3.
Engaging projections 45, 45 that engage with the spiral ridge 36 of No. 5 are formed.

To mount the nozzle cap 4 on the cylinder 3, first, the needle-like protrusion 42 of the nozzle cap 4 is inserted into the passage 34 of the nozzle portion 33 of the cylinder 3 from below, and then the flange 44 of the nozzle cap 4 is engaged. By screwing the projections 45, 45 into the spiral ridges 36 of the nozzle cap mounting portion 35 of the cylinder 3, the nozzle cap 4 is fixed to the nozzle cap mounting portion 35 of the cylinder 3 as shown in FIG. The fitting wall 43 of the nozzle cap 4 is fitted to the outside of the nozzle portion 33, and the tip of the needle-like protrusion 42 of the nozzle cap 4 is located at the boundary between the conical portion 32 of the cylinder 3 and the nozzle portion 33.

FIG. 4 is a sectional view showing the head cap of the syringe barrel for dispenser of the present invention. Head cap 5
As shown in FIG. 4, the head main body 5 of the head cap 5 has a cap main body 50, and an outer peripheral surface of the peripheral wall 51 of the head cap 5 has an annular convex portion 52 that is in close contact with the inner peripheral surface of the cylindrical main body 30 of the cylinder 3. The annular convex portion 52 of the peripheral wall 51 of the cap body 50 of the head cap 5 is formed at 90 ° with respect to the center.
Concave grooves 53, which serve as ventilation parts, are formed along the central axis direction at four symmetrical positions of the cap body 5 of the head cap 5.
A flange 54 extending outward is formed on the edge of the peripheral wall 51 of 0.

The head cap 5 is attached to the cylinder 3 by first filling the inside of the cylinder 3 with the silver paste 2 and then inserting the piston 6 into the inside of the cylindrical body 30 of the cylinder 3 from the opening at the upper end thereof. The head body 5 of the head cap 5 is pushed into the inside of the cylinder body 30 of the cylinder 3 near the upper end thereof, so that the flange 54 of the head cap 5 abuts the flange 31 of the cylinder 3. As shown in FIG. 1, the head cap 5 is fitted and fixed to the cylindrical main body 3 of the cylinder 3, and the annular convex portion 52 of the head cap 5 is in close contact with the inner peripheral surface of the cylindrical main body 30 of the cylinder 3.

A cylinder 3, a nozzle cap 4, a head cap 5, which is used in the syringe barrel 1 for dispenser of the present invention,
Examples of the material of the piston 6 include polyethylene, polypropylene, polyethylene terephthalate, synthetic resin such as polytetrafluoroethylene (Teflon; registered trademark), glass, aluminum, stainless steel and the like.

As a method of fixing the nozzle cap attachment portion 35 of the cylinder 3 and the nozzle cap 4, for example, a screw type, a needle type, a fitting type and the like can be mentioned, among which the screw type is preferable. Also, the cylindrical body 30 of the cylinder 3
Examples of the method for fixing the head cap 5 and the head cap 5 include a screw type, a needle type, and a fitting type. Among them, the fitting type is preferable.

The difference between the inner diameter of the nozzle portion 33 of the cylinder 3 and the outer diameter of the needle-shaped protruding portion 42 formed on the nozzle cap 4 for closing the passage 34 of the nozzle portion 33 of the cylinder 3 is 0.05 to 0.15 mm. Is preferable, and when the difference between the inner diameter of the nozzle portion 33 of the cylinder 3 and the outer diameter of the needle-shaped protruding portion 42 of the nozzle cap 4 is 0.05 mm or less, the nozzle portion 33 of the cylinder 3 of the needle-shaped protruding portion 42 of the nozzle cap 4 is preferable. Of the nozzle cap 4 is broken, and the needle-shaped protrusion 42 of the nozzle cap 4 is broken, clogging the passage 34 of the nozzle portion 33 of the cylinder 3, and the silver paste cannot be applied from the nozzle portion 33 of the cylinder 3. There is. Further, when the difference between the inner diameter of the nozzle portion 33 of the cylinder 3 and the outer diameter of the needle-shaped protruding portion 42 of the nozzle cap 4 is 0.15 mm or more, the nozzle portion 33 of the cylinder 3 and the needle-shaped protruding portion 42 of the nozzle cap 4 are There is a problem that the airtightness between them is poor, and voids are generated in the conical portion 32 of the cylinder 3 due to air or gas when the dispenser injection cylinder 1 is stored or transported.

Needle-like protrusion 42 of nozzle cap 4
It is more preferable that the tip of the needle-shaped protrusion 42 of the nozzle cap 4 is located at the boundary between the conical portion 32 of the cylinder 3 and the nozzle portion 33. Is longer than this, the tip of the needle-like protruding portion 42 of the nozzle cap 4 will be
Of the cylinder 3 protruding from the conical portion 32 of the cylinder 3
2 has a convex portion formed by the needle-shaped protrusion 42 of the nozzle cap 4, and when the needle-shaped protrusion 42 of the nozzle cap 4 is shorter than this, the tip of the needle-shaped protrusion 42 of the nozzle cap 4 is the nozzle of the cylinder 3. Passage 3 of section 33
4, the nozzle portion 33 of the cylinder 3 has a concave portion formed by the needle-like protruding portion 42 of the nozzle cap 4,
When pouring the silver paste 2 into the cylinder 3, there is a problem that voids due to air or gas are generated in the convex portion of the conical portion 32 of the cylinder 3 or the concave portion of the nozzle portion 33 of the cylinder 3.

The depth of the concave groove 53 formed in the annular convex portion 52 in close contact with the inner peripheral surface of the cylindrical main body 30 of the cylinder 3 of the head cap 5 is preferably 0.01 to 0.5 mm,
When the depth of the concave groove 53 of the annular convex portion 52 of the head cap 5 is 0.01 mm or less, the annular convex portion 5 of the head cap 5 is
The air permeability of the second concave groove 53 is deteriorated, and a pressure difference between the inside and the outside of the cylinder 3 is likely to occur, which causes a problem such as a void. In addition, the annular convex portion 5 of the head cap 5
When the depth of the concave groove 53 of 2 is 0.5 mm or more, the air permeability of the concave groove 53 of the annular convex portion 52 of the head cap 5 becomes too good, and the annular convex portion 5 of the head cap 5 is inside the cylinder 3.
There is a problem that foreign matter such as dust or dirt is mixed from the outside through the second concave groove 53.

The width of the concave groove 53 formed in the annular convex portion 52 in close contact with the inner peripheral surface of the cylindrical main body 30 of the cylinder 3 of the head cap 5 is preferably 0.01 to 3.0 mm, and the annular shape of the head cap 5 The width of the concave groove 53 of the convex portion 52 is 0.0
When it is 1 mm or less, the air permeability of the concave groove 53 of the annular convex portion 52 of the head cap 5 is deteriorated, and a pressure difference between the inside and the outside of the cylinder 3 is likely to occur, which causes a problem such as a void. Further, when the width of the concave groove 53 of the annular convex portion 52 of the head cap 5 is 3.0 mm or more, the air permeability of the concave groove 53 of the annular convex portion 52 of the head cap 5 becomes too good, and the head cap is placed inside the cylinder 3. There is a problem that foreign matter such as dust or dirt enters from the outside through the concave groove 53 of the annular convex portion 52 of No. 5.

FIG. 5 is a sectional view showing another head cap used for the syringe barrel for the dispenser according to the embodiment of the present invention. As shown in FIG. 5, the head cap 5 has a cap main body 50, and an outer peripheral surface of the peripheral wall 51 of the cap main body 50 of the head cap 5 has an annular projection that is in close contact with the inner peripheral surface of the cylindrical main body 30 of the cylinder 3. A portion 52 is formed, a flange 54 extending outward is formed on an end edge of the peripheral wall 51 of the cap body 50 of the head cap 5, and an end wall that closes the inside and the outside of the cylinder 3 of the head cap 5 is formed. A ventilation hole 56 serving as a ventilation portion is provided in 55.

The diameter of the vent hole 56 of the end wall 55 that closes the inside and the outside of the cylinder 3 of the head cap 5 is φ.
0.01 to φ0.5 mm is preferable, and head cap 5
If the diameter of the vent hole 56 of the end wall 55 of the cylinder is 0.01 mm or less, the air permeability of the vent hole 56 of the end wall 55 of the head cap 5 is deteriorated, and a pressure difference between the inside and the outside of the cylinder 3 is likely to occur. There are problems such as voids. Further, the diameter of the vent hole 56 of the end wall 55 of the head cap 5 is φ.
If it is 0.5 mm or more, the air permeability of the ventilation hole 56 of the end wall 55 of the head cap 5 becomes too good, and dust or dust from the outside passes through the ventilation hole 56 of the end wall 55 of the head cap 5 into the cylinder 3. There is a problem that foreign matter of

Injection barrel for dispenser of the present invention (FIG. 1)
Table 1 shows changes with time of air or gas generated in the nozzle portion 33 of the cylinder 3 and the conical portion 32 of the cylinder 3 when the conventional syringe cylinder for dispenser (FIG. 6) is filled with the silver paste 2.

[Table 1]

Example A in Table 1 shows the case where the syringe barrel for dispenser of the present invention shown in FIG. 1 is used. Example B of Table 1 is shown in FIG.
The case where the head cap of the present invention shown in FIG. 4 is used for the syringe barrel for dispenser of the present invention shown in FIG. Example C in Table 1
Shows a case where the head cap of the present invention shown in FIG. 4 is used in the conventional syringe barrel for dispenser shown in FIG. Example D in Table 1 shows the case where the conventional syringe for dispenser shown in FIG. 6 is used.

The material of the cylinder 3, the nozzle cap 4, and the head cap 5 is polypropylene, the inner diameter of the passage 34 of the nozzle portion 33 of the cylinder 3 is 2.5 mm, the length of the nozzle portion 33 of the cylinder 3 is 12 mm, and the nozzle cap 4
The needle-shaped protrusion 42 has an outer diameter of 2.4 mm and the needle-shaped protrusion 42 of the nozzle cap 4 has a length of 14 mm (the inner diameter of the passage 34 of the nozzle portion 33 of the cylinder 3 and the needle-shaped protrusion 42 of the nozzle cap 4). The difference from the outer diameter is 0.1m
m, the tip of the needle-like protruding portion 42 of the nozzle cap 4 is the boundary portion between the conical portion 32 of the cylinder 3 and the nozzle portion 33).

The protrusion amount of the annular convex portion 52 of the head cap 5 is 0.15 mm, the width of the annular convex portion 52 of the head cap 5 is 1 mm, and the width of the concave groove 53 formed in the annular convex portion 52 of the head cap 5 is 1 mm. , Annular projection 5 of head cap 5
The depth of the concave groove 53 of 2 is 0.15 mm, the head cap 5
The number of the concave grooves 53 of the annular convex portion 52 is three. Silver paste 2
As a product name, Epinal 4 manufactured by Hitachi Chemical Co., Ltd.
000 (phenol resin curing type epoxy resin silver paste) was used. As for the measuring method, the presence or absence of air (voids or bubbles) was visually confirmed.

From the above results, the use of the syringe barrel for dispenser and the head cap of Examples A to C of the present invention makes it possible to eliminate the hollow dead space in the passage 34 of the nozzle portion 33 of the cylinder 3 and to remove the silver paste. Since air is not sucked in from the nozzle portion 33 of the cylinder 3 due to cooling and condensation during low temperature storage of No. 2 as well, blank ejection at the time of discharging the silver paste 2 is eliminated, elimination of void trouble of the silver paste 2 and coating workability. Is shown to be improved.

In Example D, a conventional syringe barrel for dispenser is used, and air is sucked from the nozzle portion 33 of the cylinder 3 by cooling condensation of the syringe barrel for dispenser during low temperature storage. A void is generated on the wall surface, which causes a problem in coating workability due to blank ejection when the silver paste 2 is discharged.

[0043]

As described above, according to the syringe barrel for dispenser of the present invention, since the closed portion of the nozzle cap closes the passage of the nozzle portion of the cylinder, the passage of the nozzle portion of the cylinder closes the nozzle cap. The part does not become a cavity, and the paste adhesive can be filled without the presence of air or gas inside the cylinder, and the paste does not mix with the paste adhesive filled inside the cylinder. It is possible to prevent blanking when using a linear adhesive and improve coating workability.

According to the syringe barrel for dispenser of the present invention, since the needle-shaped protrusion of the nozzle cap closes the passage of the nozzle of the cylinder, the passage of the nozzle of the cylinder is hollowed by the needle-shaped protrusion of the nozzle cap. In addition, the paste adhesive can be filled without causing air or gas to exist inside the cylinder. Since it does not enter and does not mix into the paste adhesive filled in the cylinder, it is possible to prevent blanking when using the paste adhesive and improve the coating workability.

According to the syringe barrel for dispenser of the present invention, since the nozzle cap is fixed to the nozzle cap mounting portion of the cylinder by screwing, the nozzle cap can be easily attached to and removed from the nozzle cap mounting portion of the cylinder. it can.

According to the syringe barrel for a dispenser of the present invention, the difference between the inner diameter of the nozzle portion of the cylinder and the outer diameter of the needle-like protruding portion of the nozzle cap is 0.05 to 0.15 mm. It is easy to insert and remove the cylindrical protrusion from the nozzle nozzle passage, and there is no risk that the needle cap protrusion of the nozzle cap will break and clog the cylinder nozzle passage. Since the airtightness between the cap and the needle-shaped protrusion is good, air or gas is not introduced into the cylinder from the space between the nozzle of the cylinder and the needle-shaped protrusion of the nozzle cap during storage or transportation of the syringe barrel for dispenser. Since it does not enter and does not mix into the paste adhesive filled inside the cylinder, use paste adhesive Idle driving can be improved preventing in coating workability of.

According to the syringe barrel for dispenser of the present invention, since the ventilation part of the head cap eliminates the pressure difference between the inside and the outside of the cylinder, the paste adhesive is cooled and stored.
When transporting or returning to room temperature, it is possible to prevent air or gas from entering the inside of the cylinder from the slight gap between the nozzle part of the cylinder and the nozzle cap, and to paste it inside the cylinder. Since it is not mixed with the agent, it is possible to prevent blanking when using the paste adhesive and improve the coating workability.

According to the syringe barrel for the dispenser of the present invention, the difference between the inner diameter of the cylindrical body of the cylinder and the outer diameter of the head of the piston is 0.1 mm or less, so that the inner wall of the cylindrical body of the cylinder and the piston are The frictional resistance of the contact portion is reduced, the amount of the paste adhesive remaining on the inner wall of the cylindrical main body of the cylinder is reduced, and the yield of the paste adhesive can be improved.

[Brief description of drawings]

FIG. 1 is a fragmentary front view showing a syringe barrel for a dispenser according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a cylinder of a syringe barrel for a dispenser of the present invention.

FIG. 3 is a cross-sectional view showing a nozzle cap of the syringe barrel for dispenser of the present invention.

FIG. 4 is a sectional view showing a head cap of the syringe barrel for dispenser of the present invention.

FIG. 5 is a cross-sectional view showing another head cap used for the syringe barrel for the dispenser according to the embodiment of the present invention.

FIG. 6 is a fragmentary front view showing a conventional syringe barrel for a dispenser.

[Explanation of symbols]

1 Dispenser syringe 2 silver paste 3 cylinders 4 nozzle cap 5 head cap 6 pistons 13 Nozzle part 13a passage 30 cylindrical body 31 flange 32 cone 33 Nozzle part 34 passage 35 Nozzle cap mounting part 36 spiral ridge 37 Reinforcing rib 40 cap body 41 End wall 42 Needle-shaped protrusion 43 Mating wall 44 flange 45 engagement protrusion 50 cap body 51 peripheral wall 52 annular protrusion 53 groove 54 flange 55 End wall 56 vents 60 heads

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Nobuo Ichimura             Hitachi, Ichiba, Ibaraki Prefecture             Seikou Co., Ltd. Yamazaki Office (72) Inventor Shinji Takakura             Hitachi, Ichiba, Ibaraki Prefecture             Seikou Co., Ltd. Yamazaki Office (72) Inventor Keiichi Endo             Hitachi, Ichiba, Ibaraki Prefecture             Seikou Co., Ltd. Yamazaki Office F-term (reference) 4F041 AA05 AB01 BA04 BA12 BA34                 5F047 FA22

Claims (9)

[Claims] 1. A cylinder containing a paste adhesive, a nozzle cap removably attached to a nozzle portion formed on the cylinder, a head cap removably attached to the cylinder, and a movably arranged inside the cylinder. An injection cylinder for a dispenser, comprising a piston for pumping the paste-like adhesive provided, and a nozzle cap having a closing portion for closing a passage for ejecting the paste-like adhesive in the nozzle portion of the cylinder. 2. The syringe barrel for a dispenser according to claim 1, wherein the closing portion of the nozzle cap is a needle-like protruding portion that closes a passage of the nozzle portion of the cylinder. 3. The syringe barrel for a dispenser according to claim 1, wherein the cylinder has a nozzle cap attachment portion outside the nozzle portion, and the nozzle cap is fixed to the nozzle cap attachment portion of the cylinder. 4. The nozzle cap is fixed to a nozzle cap mounting portion of a cylinder by screwing.
A syringe for a dispenser according to. 5. The difference between the inner diameter of the nozzle portion of the cylinder and the outer diameter of the needle-shaped protruding portion of the nozzle cap is 0.05 to
The syringe barrel for a dispenser according to claim 2, which is 0.15 mm. 6. The head cap has a ventilation portion for eliminating a pressure difference between the inside and the outside of the cylinder.
A syringe for a dispenser according to. 7. The syringe barrel according to claim 1, wherein the cylinder has a cylindrical body, and the difference between the inner diameter of the cylindrical body of the cylinder and the outer diameter of the head of the piston is 0.1 mm or less. 8. The syringe barrel for a dispenser according to claim 1, wherein the paste-like adhesive is a silver paste for adhering a semiconductor element and a supporting substrate. 9. A paste-like adhesive, which is filled in the syringe barrel for dispenser according to any one of claims 1 to 8.