KR20000010142A - Pad mark printing press having a dispenser - Google Patents

Abstract

PURPOSE: A pad mark printing press is provided, which protects an ink from an external circumstances and prevents a pollution of the ink. CONSTITUTION: The pad mark printing press comprises: a flat (10) having a printing surface (12) which a voluntary pattern (14) is engraved; an ink supplier for spreading the ink on the printing surface (12) of the flat (10); a blade (30) for removing the ink spreaded on the printing surface (12) except for the pattern (14) according to the movement of the flat (10); an ink storehouse (40) to be located in a lower portion of the flat (10), which the removed ink flows in; a pad (50) for absorbing the ink of the pattern (14) and transmitting the pattern (14) on a printed material; a syringe (172) for storing the ink from the outside; a nozzle (180) for spreading the ink on the printing surface (12); and a tube (174) which the ink is transmitted. Therefore, the pollution of ink and hardening of ink can to be prevented and the printing quality can to be improved.

Description

Pad mark printing press comprising dispenser

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pad mark printing press for printing arbitrary marks with ink on the surface of a semiconductor device, and more particularly, to protect the ink from the external environment and to contaminate the ink. It relates to a pad mark printer, characterized in that to prevent.

The marking process is a process of printing product information such as the function, characteristics, type, speed, manufacturing date, and producer of a product on the surface of a package body molded around a semiconductor chip. It can be divided into laser marking and ink marking. Ink marking has been adopted for the printing of expensive products because of its sharper and more beautiful printing than laser marking, and a representative mark device used in the ink marking process is a pad mark printing machine.

1 is a perspective view briefly showing a conventional pad mark printing machine 100. Referring to FIG. 1, the structure and operation principle of the conventional pad mark printing machine 100 will be described below.

The conventional pad mark printing machine 100 has a flat plate 10 having a print surface 12 in which an arbitrary pattern 14 is engraved, an ink reservoir 40 in which an ink 60 is stored under the flat plate, and printing of the flat plate. It has a structure including a roller (24) for applying ink on the surface and a blade (30) for removing the ink on the printing surface. In addition, the pad mark printing machine includes a transfer rail 22 through which the semiconductor elements 20 are transferred, and a pad 50 made of rubber material that absorbs the pattern of the flat plate and transfers it onto the surface of the semiconductor element.

The operating principle of the pad mark printing machine having such a structure is as follows.

After the roller contained in the ink reservoir is lifted up with the ink, the ink is applied onto the printing surface by moving the plate to the right between the roller and the ink reservoir. After the blade, which is spaced apart on the plate, is lowered, the plate moves to the left again while the blade is in close contact with the printing surface, and ink on the printing surface except for the pattern is removed. Eventually, the ink remains only on the intaglio pattern, and the pad is squeezed onto the pattern to adsorb the ink and then transferred to the surface of the to-be-printed object such as a semiconductor element.

At this time, the ink in the ink reservoir is stored exposed to the outside, and the ink on the printing surface removed by the blade is introduced into the ink reservoir again. The ink contains a volatile thinner to maintain a viscosity suitable for the printing process, and since the ink is exposed to the outside, the viscosity of the ink changes due to the volatilization of the volatile thinner into the air and the volatilization of the thinner. You need to add thinner constantly. In addition, when about 8 to 24 hours have elapsed while the pad mark printing machine is not continuously operated, the ink can be cured at room temperature as all thinners are volatilized, and all the cured ink is discarded to consume a large amount of ink.

In addition, when the ink removed by the blade flows back into the ink reservoir, the ink may be contaminated by impurities such as dust or epoxy debris, and when such impurities are applied to the roller and applied onto the printing surface again, Damage to the blades and scratches on the plate may result in poor print quality.

It is an object of the present invention to provide a pad mark printing machine which can prevent the ink from being exposed to the external environment to be contaminated or cured.

Still another object of the present invention is to provide a pad mark printer for supplying ink using a dispenser.

1 is a perspective view briefly showing a conventional pad mark printing machine,

2 is a perspective view of a pad mark printing machine according to an embodiment of the present invention;

3A is an enlarged cross-sectional view of the nozzle of FIG. 2;

3B is a bottom view of FIG. 3A,

4A to 4D are process perspective views sequentially showing the operation of the pad mark printing machine of FIG. 2;

5 is a perspective view of a pad mark printer according to another embodiment of the present invention.

Description of the main parts of the drawing

10, 110, 210: Flatbed 12, 112, 212: Printed surface

14, 114, 114 ', 214: pattern 20, 120, 220: semiconductor element

22, 122, 222: feed rail 24: roller

30, 130, 230: blades 40, 140, 240: ink reservoir

50, 150, 250: Pad 60, 160, 260: Ink

100, 200, 300: pad mark printing machine 152: pad feeder

170, 270: dispenser 172, 272: syringe

174, 274: Tube 176, 276: nozzle feeder

180, 280: nozzle 182: breaker

184: injection body 186: injection hole

In order to achieve this object, the present invention provides a flat plate having a printed surface in which any pattern is engraved and moving horizontally; An ink supply for applying ink onto the printing surface of the flat plate; A blade in close contact with one side of the printing surface to remove ink applied onto the printing surface except for the pattern as the flat plate moves; An ink reservoir placed under the plate and into which the removed ink flows; And a pad for absorbing the ink of the pattern to transfer the pattern onto the to-be-printed object, wherein the ink supply includes: a syringe, in which the ink is sealed and stored from the outside; A nozzle for applying ink onto a printing surface; And a tube through which both ends are connected to the syringe and the nozzle, respectively, and to which ink is delivered, to provide a pad mark printing machine comprising: a dispenser;

In addition, it is characterized in that it comprises a controller which is connected to the syringe in which the ink is stored and which can adjust the pressure and time that the ink is supplied, and a circuit breaker that is coupled to the outlet of the nozzle to control the ink supply.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

2 is a perspective view of a pad mark printing machine 200 according to an embodiment of the present invention, FIG. 3A is an enlarged view of the nozzle 180 of FIG. 2, and FIG. 3B is a bottom view of FIG. 3A. The structure of the pad mark printer 200 according to the present invention will be described with reference to FIGS. 2 to 3B as follows.

As in the prior art, the pad mark printing machine 200 according to the present invention is a flat plate 110 having a printing surface 112 in which an arbitrary pattern 114 is engraved, a blade 130 for removing ink on the printing surface, a flat plate And an ink reservoir 140 placed at a lower portion of the ink container, into which ink removed by the blades is introduced, and adsorbs ink along the transfer rail 122 and the pattern 114 of the flat plate to which the semiconductor devices 120 are transferred. The rubber pad 150 to be transferred to the surface of the semiconductor device includes a structure coupled to the pad carrier (152). In addition, the syringe carrier 172 which drives the ink 180 and the nozzle 180 to apply ink onto the printing surface and the nozzle 180 in accordance with a predetermined format, the ink 160 is hermetically stored from the outside. And a dispenser 170 having a tube 174 that connects the syringe and the nozzle to deliver ink.

The ink stored in the syringe 172 is sealed from the outside to be blocked from the contaminant, and hardening due to volatilization of the thinner does not occur. A controller (not shown) is connected to this syringe, and has a structure in which the pressure and time at which ink is supplied through the controller can be adjusted.

In addition, when the nozzle 180 is described in more detail, the nozzle 180 receiving ink through the tube 174 has a breaker 182 coupled to an outlet thereof, and the breaker when the print job is not in progress. 182 may block the exit of the nozzle to prevent the ink from curing, and the injection body 186 having the injection holes 184 is formed around the exit of the nozzle.

The breaker 182 may be composed of a pneumatic cylinder using the pressure of the air connected in the device, the injection holes 184 are formed in the lower portion of the injection body 186 in the form of a lattice to inject ink onto the printing surface of the plate through the injection holes It is configured to apply.

The nozzle 180 combined with the injection body 186 is driven in parallel with the printing surface through the nozzle carrier 176, and the nozzle carrier 176 is connected to a driving means such as an XY table (not shown). It is desirable to drive the nozzle 180 freely. That is, the nozzle may be driven in a direction parallel to the printing surface, or driven in a direction perpendicular to the direction in which the flat plate moves.

4A to 4D are process perspective views briefly illustrating each step of the printing process using the pad mark printer of FIG. 2. This will be described with reference to FIGS. 4A to 4D.

Above the ink reservoir 140 is placed a flat plate 110 having a printed surface 112 in which an arbitrary pattern 114 is engraved and moved horizontally to the right (FIG. 4A). Ink 160 in the syringe 172 is applied onto the printing surface 112 via the nozzle 180 of the dispenser 170 on the left side of any pattern 114, and the flat plate 110 is again horizontal to the left. Move (FIG. 4B).

Before the flat plate 110 is horizontally moved, the blade 130 descends and adheres to the printing surface 112, thereby removing the ink 160 on the printing surface 112 passing through the blade 130. Ink remains only in any pattern 114 ′ that flows into the ink reservoir 140 and is eventually engraved intaglio (FIG. 4C). Finally, the pad 150 coupled to the pad conveyer 152 is pressed onto the flat plate 110 to adsorb ink along an arbitrary pattern 114 ′, and then the semiconductor device 120 on the conveyance rail 122. One printing process is performed by transferring onto the surface of the to-be-printed object such as) (FIG. 4D).

5 is a perspective view showing a pad mark printer 300 according to another embodiment of the present invention. This will be described with reference to FIG. 5.

As shown in FIG. 2, the pad mark printer 300 includes a flat plate 210 having a printing surface 212 having a plurality of patterns 214 engraved therein, a blade 230, and an ink reservoir 240 disposed under the flat plate. And a plurality of pads 250 transferred to the surface of the semiconductor devices along the transfer rail 222 to which the semiconductor devices 220 are transferred and the pattern 214 of the flat plate. In addition, a dispenser having a syringe 272 in which the ink 260 is stored, a nozzle carrier 276 for driving the nozzle 280 and the nozzle 280, and a tube 274 connecting between the syringe and the nozzle And 270.

As shown in FIG. 5, it is obvious that the shape and number of marks to be printed in the structure of the pad mark printer can be freely applied within the scope of the spirit of the present invention.

As described above, the pad mark printing machine including the dispenser can be protected from the external environment because the supplied ink is stored in a sealed storage container such as a syringe, and thus can be prevented from being contaminated by dust or the like. Since the thinner contained in the ink is not volatilized into the air, the ink is not cured even if the work is not performed for a long time.

The pad mark printing machine according to the present invention has a structure including a dispenser including a syringe which is a container in which ink is stored and a nozzle which is a tool for applying ink onto a flat plate. Compared with the ink supplied from the ink reservoir where the mark printer is exposed to the external environment, disadvantages such as contamination of the ink or curing of the ink can be prevented. In addition, since the ink removed through the blade is not applied onto the printing surface again, impurities that may occur during the removal process are not included in the ink applied on the printing surface, and thus, damage of the blade and the flat plate caused by the impurities are eliminated. Damage to the device such as scratching can be prevented, and further, print quality can be improved.

Claims (7)

A flat plate having a printed surface with any pattern engraved and moving horizontally; An ink supplyer for applying ink onto a printing surface of the flat plate; A blade in close contact with one side of the printing surface to remove ink applied onto the printing surface except for the pattern as the flat plate moves; An ink reservoir placed under the flat plate and into which the removed ink flows; And A pad for absorbing ink of the pattern to transfer the pattern onto a to-be-printed object; In the pad mark printing machine comprising: The ink supplier is A syringe in which the ink is sealed from the outside; A nozzle for applying the ink onto the printing surface; And A tube having both ends connected to the syringe and the nozzle, respectively, to which the ink is delivered; Pad mark printing machine, characterized in that the dispenser comprising a. The pad mark printing machine as claimed in claim 1, wherein the dispenser further comprises a controller connected to the syringe and configured to adjust a pressure and a time at which the ink is supplied to the tube. 3. The pad mark printing machine as claimed in claim 2, wherein the dispenser further comprises a circuit breaker for controlling the supply of the ink at the outlet of the nozzle. 4. The pad mark printing machine according to claim 3, wherein the nozzle is driven in a direction parallel to the printing surface and perpendicular to a direction in which the flat plate moves. 5. The pad mark printing machine as claimed in claim 4, wherein the nozzle is driven in a direction in which the flat plate moves. The pad mark printing machine of claim 1, wherein the arbitrary pattern is at least one mark of a predetermined shape, and the pad is formed at least one corresponding to the arbitrary pattern. The pad mark printing machine according to claim 1, wherein the to-be-printed object is a package body molded from a bag resin.