JPS5952654A - Printer - Google Patents

Abstract

PURPOSE:To enable an automatic cleaning job by providing a cleaning device opposite to a transfer pat swinging between a marking cylinder and a printing position for cleaning the printing surface thereof in a printer for a semiconductor device. CONSTITUTION:A transfer pat 7 is swung between a mark 5 of a marking cylinder 6 inked by a reciprocal movement of a transfer roller 4 and a printing position A on a movable chute 11, and prints a mark on a surface of a semiconductor device 9 transferred. When a change of a printing mark or a printing of a predetermined number of times are taken place, while the transfer pat 7 is stopped at the printing position, the movable chute 11 is moved. A wash water tank 31 is pressurized at its inside by activating a solenoid valve 32. A solvent 35 is fed to a brush 18. A rotar 19 is rotated by a motor 30 in order to lift a cylinder 29 upward for washing a printing face 7a of the transfer pat 7. In this way, the cleaning job of the printer is conducted automatically so that the working ratio can be improved and that a stable marking quality can be obained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device used for printing marks such as a model name and a loft number on a semiconductor device.

When manufacturing a semiconductor device, the final manufacturing process includes a step of printing marks such as the model name and lot number on the front or back side of the semiconductor device. A so-called transfer printing method is used in which ink in a tank is supplied to a stamp and characters, numbers, etc. stamped on the stamp are transferred to a semiconductor device.

An overview of a conventional printing device of this type is shown in FIG. 1. In FIG. A tank (34) is arranged. (4) is a transfer roller installed to reciprocate between the roller (3) and a stamp (5) to be described later, and this transfer roller (4) transfers ink from an ink tank (34). It has the function of supplying the above-mentioned marking (5). (6) is a marking cylinder that is rotatably supported by the printing device main body (1) and configured to stop at a fixed position;
There are stamps (5) with marks (33) such as letters and numbers at equal intervals on the outer periphery of the 1. There are multiple locations.

In this example, four stamps (5) are arranged on the outer periphery of the stamp cylinder (6), and the stamp cylinder (6) rotates 90 degrees from the specified position @B of one stamp (5) and stops. This involves repeatedly performing the following actions. (1) is a transfer bat driven by a drive device (not shown), and this transfer plate () [) is the stamp (5) on the stamp cylinder (6) and the circumferential shoe (10) as a conveyance rail. The mark (33) of the stamp (5) is transferred and printed onto the semiconductor device (9) which is conveyed on the fixed shoe +- (io) by swinging movement between it and the location A to be printed. is configured to do so. In addition, in the figure, (
8) is a frame for supplying the semiconductor device M (9) to the fixing shoe (10).

In such a printing device, when the ink in the ink tank (34) is supplied to the transfer roller (one stamp 6 on the stamp cylinder (6) via the four cylinders), the transfer vat σ) is filled with ink. Specified position B and fixing shoe on the supplied stamp (5))
(10) By making a swinging movement of the person at the above printing point, a mark (33) corresponding to the shape of the stamp (5) transferred to the surface of the transfer batt σ) is placed on the semiconductor device (9) at this point A. ) can be transfer printed on. Here, a plurality of markings (5) are arranged on the outer periphery of the marking cylinder (6), but these are formed to change the type of mark to be printed depending on the type of semiconductor device 1. be. In other words, the semiconductor devices that are transported one square square above the fixed chute (10) are not necessarily scales with the same model name and the same loft, but semiconductor devices with different model names or lofts are transported. If the stamp cylinder (6) is
It is designed so that it can be printed by rotating it in an 11+ direction according to the above-mentioned model name and loft.

However, printing using such a conventional Ell wave device has the following serious drawbacks.

In other words, the marking cylinder (6) can be used to match the semiconductor device, and the model name and lot can be arbitrarily and automatically selected using -11, but the ink transferred to the transfer vat (7) is not cleaned; In addition, it is necessary to clean (wipe) the device with water, which significantly reduces the operating rate of the device. ! , idle device ff
The surface of (9) is easily soiled during transportation, and as a result, the printing surface of transfer vat (7) also becomes soiled every time printing is performed several dozen times), thus impairing clear printing. This is a big factor. For this reason, it is necessary to clean the printing surface of the transfer stop pad once every few dozen times, and human intervention is also required at this time, which is a negative impact on improving the operating rate and automation of the equipment. This was a contributing factor.

In view of the above, the present invention has been made in order to eliminate the drawbacks of the conventional technology. The present invention provides a printing device that can increase the operating rate of the device and improve the quality of mark printing by automatically performing the printing without human intervention.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view of a main part of a schematic structure of a printing device 6 according to an embodiment of the present invention. In Fig. 2, (1) is the main body of the printing device, and as shown in Fig. 3, there is a doctor Q), a roller (3), and a doctor (
2), roller (3) ink stored in ltiJ (13
) is provided with an ink tank (34).

In order to supply ink from this ink tank (34) to the stamp (5) on the stamp cylinder, the roller (3)
) and the stamp (5). In addition, the one stamp mentioned above (
A transfer pad (7) that is moved by a drive device (not shown) is placed between the movable chute (11) (described later) and the transfer pad (7), as shown in FIG. The ink is designed to oscillate in a semicircular trajectory between the position B on the 5th mark and the 1st place A on the IJ chute (11). The tank (34), transfer roller (4), engraving drum and transfer pad (7) are basically the same as the conventional one shown in Figure 1, and in Figure 2 they are different from those in Figure 1. Identical or equivalent parts are designated by the same reference numerals h.

1, (11) is located between the fixed chutes (10), and guides the semiconductor device (9) being conveyed from one side to the area A to be printed using the transfer pad (1), and also guides the semiconductor device (9) conveyed from one side of the fixed chute (10) to the location A where printing is to be performed. This is a movable chute as a movable coasting rail configured to reciprocate 1tu in the horizontal direction intersecting with ). This movable chute (11) is
The ends of the 1,000 jifij are each fixed to an L-shaped mounting plate (14), and as shown in FIG. base (4
The roller bearing (15) and cylinder (16) interposed between the transfer pad (7) during cleaning
It is adapted to be moved in the direction of arrow 42 in conjunction with the movement of. In addition, in FIG. 6, (41) is a cylinder arm fixed to the mounting plate (14) through the rod of the cylinder (16), and (42) is the cylinder arm (16).
) is a support that supports horizontally.

Furthermore, (12) is a cleaning device provided below the movable chute (11) for cleaning the printed surface of the transfer plate (), a specific example of which is shown in FIG.

In FIG. 5, (19) is a rod-shaped rotary tool with a wiping tool (18) held at its tip, and its lower end is the shaft of a motor (30) fixed to the main body (1) of the printing device 6. connected to. ′! In addition, a through hole (21
) is provided, and the rotary tool (19) is rotatably supported in an upper and lower tool (25), which will be described later, and is rotationally driven by a motor 30. A solvent, which will be described later, is delivered to a wiping tool (18). (25) is an introduction hole (25) which supports the middle part of the rotating tool (19) by a bearing (20) so that it can rotate freely in the horizontal direction, and which communicates with the through hole (21) of the rotating tool (19). This is a top and bottom tool with a length of 21 m).
5) Both i>Wi part, the tip of the lifting shaft (26) supported by a pair of bearings (27) installed perpendicularly to the horizontal plane of the main body (1) of the printing island 16 (1). ? It is fixed to ib. -ry, these Ascendance II・I! The lower end of the shaft (26) is connected to the cylinder arm (28) of a cylinder (29) installed in the main body (1) of the printing apparatus, and the front (2) upper and lower tools (25) are connected to the cylinder (29). It is designed to move downward by -1- through the vertical axis (26) due to the forward movement of (24), which is a seal part I that seals between the rotation A (19) and the upper and lower tools (25). It is.

On the other hand, (31) 1-J- the joint (22) and hose (23) attached to the introduction hole (21a) of the upper and lower tool (25)
) This tank (31) stores a solvent (35) as a cleaning liquid, and air (not shown) is supplied to the tank (31) through a solenoid valve (32). By being pressurized by the pressurized air sent from the chamber, the connection is made from the joint (22) via the port (23) to the introduction hole (21a) of the upper and lower tool (25) and the rotation J1. The water is supplied to the spout (17) and the wiping tool (18) through the through hole (21) in (19). Note that it is preferable that the material of Wipe@JA (1B) be made of porous felt or clean cloth that does not produce waste.

Next, the operation of the above embodiment will be explained based on FIG. Here, the solvent (3) stored in the cleaning liquid tank (31)
5) is pressurized by pressurized air sent out through a solenoid valve (32) that is activated during cleaning, and is supplied to the wiping tool (18). However, when the model name or lot number of the semiconductor device 0) is changed and the printing mark is changed, or if the surface of the transfer pad σ) is dirty after printing several dozen times, the first step is to clean the transfer pad. ) is shown in Figure @6. Stop at the location A on the J-motion chute (11) to be printed. Next, in connection with the stopping operation of the transfer pad σ), the movable chute (11) is moved to the sixth position by the cylinder (16).
Move it in the direction of arrow A in the figure to clear the lower part of the transfer pad σ).

Next, the solenoid valve (32) is driven, and the solenoid valve (32) is driven.
) The cleaning liquid tank (3
1) Pressurize the interior and pass the solvent (35) through the hose (23) to the joint (22) and the introduction hole (21) of the upper and lower tools (25).
a) and is supplied to the wiping JL (1B) through the through hole (21) of the rotating tool (19). At the same time, the cylinder (
29) When Sr k moves and the motor (30) is energized, the rotation of the motor (30) causes the rotary tool (19) to rotate once in the direction of the arrow C shown in FIG. Above the activated trap' JL (
25) rises in the direction of arrow 2 in FIG. Wipe A (II) held at the tip of the rotating tool (19)
) comes into contact with the J printing surface (1a) of [), and the rotation of this wiping tool (18) causes the transfer pattern to be transferred.
The ink and dirt adhering to the printing surface of [) are removed, and the transfer bat σ) is cleaned.

After this cleaning, the cylinder (29) is operated in the opposite direction to the above to lower the upper tool (25), and then the upper F tool (25) is lowered.
After returning to the W-phase state, the motor (3o) is stopped +h, and the pressure in the pre-cleaning tank (31) is brought to atmospheric by switching the magnetic valve (32) to the cylinder (16i). ) is reversely operated to return the movable shoe (11) to its original position, and the series of cleaning operations is completed.

As described above, according to the printing device of the present invention, cleaning operations that previously required human intervention can be carried out automatically, thereby greatly increasing the operating rate of the printing device and stably improving mark quality. is measured. In addition, in the case of cleaning for dirt (7) (transfer rose), it is sufficient to count the number of passing semiconductor devices to 4 with a counter, and changes in model name and lot can be easily recognized by signals from the previous process. Therefore, complete automation can be achieved by automating a series of cleaning operations based on the detected information.

In addition, in the above-mentioned embodiment, the case was shown in which the rail interposed between the fixed chutes was configured to be movable and the transfer vat was cleaned at a position below the rail, but the present invention is not limited to this. The printing surface of the transfer vat may be cleaned at a predetermined position, or the same effect can be obtained by cleaning the transfer vat by rotating it.

As explained above, the printing apparatus of the present invention can automatically perform cleaning work by providing a cleaning device for cleaning the printing surface of the transfer vat.
Therefore, the production efficiency of the semiconductor device 1h1 is improved, such as improving the operating rate of the printing device and the number of mark items.

[Brief explanation of the drawing]

Figure 1 is a perspective view of main parts showing an outline of a conventional printing device b<+
, ax 2 Figure 4 shows a printing apparatus according to an embodiment of the present invention.
1; (: A perspective view of the main part showing the outline, Figure 3 is a schematic diagram showing the supply of ink from the ink tank to the marking part in Figure 2, and a schematic diagram of the transfer vat shown in Figure 2. FIG. 5 is a cross-sectional view of a main part showing a specific example of the cleaning device in FIG. 2, and FIG. 6 is a schematic diagram showing the cleaning method. (2)・...Doctor, 13) ...@+1-ra, (
4)... Transfer roller, (5)... Engraved t-IJ,
(6*a*a engraved paulownia, (1)...transfer para),
(8) ... Frame, (10) ... Fixed chute, (,11) - ... Possible #i11 shoot, (12)
...Cleaning device iL (16)...e cylinder,
(17)・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
19)...Rotating tool, (21,)...Through hole, (
21a)...Introduction hole, (22)-...Joint, (2
3)... Hose, (24) -10 Seal member, (
25) Self...Upper/lower tool, (26)... Lifting Q1+, (
2T)...A receiver, (29)...Cylinder, (3
0)...Motor, (31)...Cleaning liquid tank,
(32)...Solenoid valve, (34)...Ink tank, (35)...Solvent (cleaning liquid). Agent Kazumasa Kuzuno - Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (3)

[Claims] (1) An ink tank that stores ink, a marking cylinder on which a plurality of markings are arranged at equal intervals on the outer periphery, and markings on the marking cylinder and printing on the transport rail on which the semiconductor device is transported. A transfer vat swings between the transfer vat and the transfer vat, and by supplying ink in the ink tank to the imprint via a transfer roller, the mark stamped on the imprint is transferred by the transfer vat. 1. A printing apparatus for printing on the semiconductor device, characterized in that the transfer vat is provided with a cleaning device fi for cleaning the printing surface thereof. (2) The cleaning device includes a rotary tool that holds a wiping tool at its tip and has an l () lil hole that communicates with the outside from the holding portion of the wiping tool, and a rotary tool that rotatably supports the rotary tool and that rotates the tool. A top and bottom tool having an introduction hole that communicates with a through hole of the tool, a motor connected to the lower end of the rotary tool to rotate the rotary tool, an elevator for driving the top and bottom tool, and an introduction of the top and bottom tool. A cleaning liquid supply means communicates with the hole and supplies cleaning liquid to the wiping tool, and the wiping tool contacts the printed surface of the transfer vat and rotates while cleaning the printed surface. A printing apparatus according to claim 1. (3) The transport rail is movably supported by roller bearings and cylinders to form a movable rail, and by moving this movable rail in conjunction with the operation of the transfer bat, 3. The printing device according to claim 1, wherein the printing surface of the transfer bat is cleaned at the printing position.