JPH09253874A - Marking device and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mark at an accurate position and improve the productivity. SOLUTION: A marking device 1 is composed of a mounting stand 2, a moving means 3, a laser marker 4 to print, an optical sensor 5 to detect the boundary of a work and a controller 6. On the mounting stand 2, a stick case 18 is fixed as a work 20 is received, and a pressing member 9 to press the work 20a of the final part to the A direction is installed. On the moving means 3, an encoder to detect the number of rotation is built-in and a servo motor 12 to rotate a screw bar 13 normally or reversely is provided. Then, the controller 6 is stored with the information of the total length of each work 20 and inputted with the information in order to calculate the movement amount of the work 20 from the servo motor 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking device and a method for marking a semiconductor device as a plurality of workpieces housed in a storage case called a stick with a laser.

[0002]

2. Description of the Related Art In general, a method of marking with a marking device of this type is such that works are taken out one by one from a stick, placed on a table of the device, and the positions of the placed works are recognized one by one by a camera. However, the position of the laser marker is corrected to a predetermined position based on the recognized position information, and the work is printed.

[0003]

In the above-described conventional method of marking with a laser, since the work is taken out from the stick, the work itself is complicated, and it is difficult to take out the work due to clogging of the work. In addition, since the position of the laser marker is corrected by recognizing the position of the workpiece one by one by the camera, mass production processing of a large number of pieces cannot be performed, and the position correction of the laser marker based on the position information of the camera is complicated, so that time However, there is also a problem that the production quantity does not increase.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a marking device and a method for marking at an accurate position and improving productivity. It is in.

[0005]

In order to achieve this object, a marking device according to the present invention comprises a plurality of semiconductor devices arranged in a line and an elongated storage case having an open upper part;
The storage case is mounted, and the mounting table is provided with a pressing means for pressing the semiconductor device against the front part from the rear side of the storage case, and the means for moving the mounting table in one direction and detecting the amount of movement. Moving means, a detecting means for detecting a boundary between semiconductor devices through an open upper part of the storage case, a laser marker for printing on the semiconductor device, information on a moving amount from the moving means, and a semiconductor device from the detecting means. The control unit controls the moving means so that the semiconductor device corresponds to the laser marker by inputting the detection information for detecting the front end and the rear end. Therefore, the semiconductor device in the storage case is pressed against the front part of the case without any gap, the number is detected by the detecting means, and the semiconductor device is detected based on the detection of the front end and the rear end of the semiconductor device by the detecting means and the moving amount of the moving means. The total length per device is detected, and the control unit controls the position correction of the semiconductor device based on the number information and the total length information per device.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing the entire marking device according to the present invention, FIG. 2A is a front sectional view showing an enlarged detection state by the optical sensor, and FIG. It is the side sectional view shown. In these drawings, a marking device, generally designated by the reference numeral 1, includes a mounting table 2, a moving means 3 for moving the mounting table 2 in a straight line, a laser marker 4 for printing on the work 20, and a boundary between the work 20 An optical sensor 5 for detecting,
And a control unit 6.

The mounting table 2 is supported by a guide mechanism (not shown) fixed to the floor 22 so as to be movable in the direction of arrows AB in the figure, and a screw portion (not shown) is screwed on the lower surface. The mover 7 is fixed. A spring retaining member 8 is provided upright on the upper surface of the mounting table 2. A tension spring 10 interposed between the spring retaining member 8 and the pressing member 9 causes the pressing member 9 to The latch member 8 is guided by a guide portion (not shown) and is provided in the direction of arrow A in the figure.

The moving means 3 is provided with a servomotor 12 which is fixed to the floor 22 and has a built-in encoder for detecting the number of revolutions. The servomotor 12 is connected to the controller 6 by a signal line 15. . This servo motor 1
The screw shaft 13 is screwed into the screw of the mover 7 of the mounting table 2 and the tip is rotatably supported by a bearing member 14 fixed to the floor 22 so that the shafts of the rotary shaft 2 are aligned with each other. And are integrally connected.

The laser marker 4 and the optical sensor 5 are connected to the control unit 6 by signal lines 16 and 17, respectively. Reference numeral 18 denotes a stick case as a storage case formed in an elongated box shape for storing a plurality of works 20 each having a recess 21 formed in an upper portion of a front end and a rear end, and extending in a longitudinal direction at an upper portion. A groove-shaped opening 19 is formed.

Next, the marking device 1 having such a configuration will be described.
Will be described. First, the stick case 18 in which the work 20 is stored is fixed to the mounting table 2,
The pressing member 8 is engaged into the stick case 18 through the opening 19, and is brought into contact with the last work 20 a of the works 20 in the stick case 18. Thus, the rearmost work 20a is pressed by the pressing member 9 in the direction of the arrow A in the drawing, and each of the plurality of works 20 is narrowed. The laser marker 4 is placed above the opening 19 of the stick 18 fixed to the mounting table 2.
And the optical sensor 5 are adjusted so that they are positioned.

In such a state, the servo motor 12
Is rotated forward, the screw rod 13 rotates, and the mounting table 2 moves in the direction of arrow A in the figure via the moving element 7 screwed with the screw rod 13. As the mounting table 2 moves, the stick case 1
8 and the work 20 also move in the direction of arrow A, and FIG.
As shown in (1), the concave portion 21 at the front end of the first work 20 is detected by the optical sensor 5 for the first time. Further, the work 20 moves in the direction of arrow A, and the concave portion 21 at the rear end of the first work 20 is detected by the optical sensor 5 for the second time, and is transmitted to the control unit 6 through the signal line 17 together with the first detection described above. Upon input, the control unit 6 counts one work 20.

The control unit 6 receives the number of rotations of the servo motor 12 between the first and second detections from the encoder of the servo motor 12 and controls the movement of the mounting table 2 based on the number of rotations. The quantity, that is, the total length of the work 20 is calculated. In this way, the number of works and the total length of each work 20 are stored by the signals from the optical sensor 5 and the servomotor 12 sequentially, and the counted number of works is determined by the laser marker 4 set in the control unit 6 in advance. When the number of irradiation divisions is reached, the rotation of the servomotor 12 stops, and the movement of the work 20 in the direction of arrow A stops.

Next, a signal for reversely rotating the servomotor 12 is sent from the control unit 6 through a signal line 15 to the
Moves in the direction of arrow B in the figure, and the work 20 also moves in the direction of arrow B. At this time, since the total length of each work 20 is stored in the control unit 6 as described above, the arrow B of the work 20 calculated from the rotation speed from the encoder of the servo motor 12 input to the control unit 6 The control unit 6 compares the moving amount in the direction with the total length of the work 20. When the work 20 reaches a predetermined position, a signal for instructing the laser marker 4 to irradiate the work 20 with a laser is sent to the laser marker 4.

As described above, the control unit 6 includes each work 20
Of the work 20 is input from the servo motor 12 so that the laser marker 4 always prints at a predetermined position on the work 20. Is printed. Further, complicated work such as taking out the work 20 from the stick case 18 becomes unnecessary. Further, since the pressing member 8 is configured so that a gap between the works 20 does not always occur, the position of the work 20 can be accurately detected and marking can be performed continuously.
Productivity is improved.

[0015]

As described above, according to the present invention, the information on the amount of movement from the moving means and the detection information for detecting the front end and the rear end of the semiconductor device from the detecting means are input to the semiconductor device. By providing a control unit for controlling the moving means so as to correspond to the laser marker, the control unit stores information on the total length of each semiconductor device, and calculates the amount of movement of the semiconductor device from the moving means. Is input, the laser marker is always printed at a predetermined position of the semiconductor device, and the printing is performed at an accurate position. Further, since printing can be performed while a plurality of semiconductor devices are stored in the storage case, complicated work such as taking out the semiconductor devices from the storage case is unnecessary. Furthermore, since the gap between the semiconductor devices is not always generated by the pressing member, the position of the semiconductor device can be accurately detected and the marking can be continuously performed, thereby improving the productivity.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a marking device according to the present invention.

FIG. 2A is an enlarged front sectional view showing a detection state by an optical sensor in the marking device according to the present invention;
FIG. 3B is an enlarged side sectional view showing a printing state using a laser marker.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 marking device 2 mounting table 3 moving means 4
Laser marker, 5: optical sensor, 6: control unit, 9: pressing member, 12: servo motor, 18: stick case, 1
9 ... opening, 20 ... work, 21 ... recess.

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location G01B 21/00 G01B 21/00 A

Claims (2)

[Claims] 1. A slender storage case having a plurality of semiconductor devices stored in a line and having an open top, and a pressing means for fixing the storage case and pressing the semiconductor device from one end of the storage case to the other end. A mounting table, a moving means having means for moving the mounting table in one direction to detect the amount of movement, a detecting means for detecting a boundary between the semiconductor devices through the opening of the storage case, and printing on the semiconductor device. The semiconductor device is moved so as to correspond to the laser marker by inputting the laser marker to be performed, information on the amount of movement from the moving means, and detection information for detecting the front end and the rear end of the semiconductor device from the detection means. A marking device comprising: a control unit that controls the means. 2. A marking method for printing with a laser marker on each of a plurality of semiconductor devices housed in a housing case, wherein the semiconductor devices are housed in the housing case without a gap between the semiconductor devices. The storage case is moved, and the total length of each semiconductor device is calculated by detecting the movement amount and the front end and the rear end of each semiconductor device, and the marking position is determined by comparing the calculated total length and the movement amount. Marking method characterized by.