JPS6148263B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laser marking device, and particularly to a programmable read-only memory (hereinafter referred to as P-
This invention relates to a laser marking device suitable for marking on containers (abbreviated as ROM).

Conventionally, identification symbols such as product name, manufacturer, and manufacturing code for integrated circuits were marked by applying ink to the surface of the container using a rubber or metal stamp called a stamp, but this method caused misalignment of the stamp position. , which tended to become unclear due to ink smearing or chipping. In addition, there was a problem in that workability was poor, such as requiring flattening of the character surface of the stamp and a drying process after stamping, resulting in a lack of quick workability. In particular, in the case of P-ROM, after writing (programming) a specific pattern, the pattern name corresponding to that bit pattern must be marked on each P-ROM by some method.
The above-mentioned conventional technology has poor workability, such as incorrect marking, and lacks reliability.

The object of the present invention is to eliminate the above-mentioned drawbacks.
The purpose is to provide an effective means for marking ROM.

Features of the present invention include means for controlling the relative position of the programmable read-only memory device and the output light from the laser light source, and means for controlling the output light in conjunction with the position control means, - means for supplying a bit pattern write signal from a device for programming a read-only memory device; and means for supplying a name signal representing the bit pattern corresponding to the bit pattern write signal from the programming device to the control means; There is a laser marking device having the following.

The present invention utilizes the fact that a laser light source has energy well focused in an extremely fine cross section, and as a result, when it is applied to the surface of an object, it is suitable for fine processing of the surface. Furthermore, since the device that programs the P-ROM supplies a name signal corresponding to the write signal of this bit pattern to the marking control means, a marking that reliably matches the written content can be obtained. . That is, P-
There are no errors such as markings that do not match the bit pattern written to the ROM. Since the laser beam is generated in a pulsed manner, this micro-machining is preferably an intermittent dot-like process, and any symbol can be expressed by using an appropriate number of dots. For character symbols (alphabets, numbers, kana, etc.), the already well-known 5×7, 7×
It is preferable to use a standard dot matrix such as 9.

Next, the present invention will be explained with reference to FIG. 1st
The figure shows a conceptual diagram of an embodiment for marking the name of a P-ROM pattern. First, the pattern name, which is a symbol to be marked, is input into the character buffer 3 either online in conjunction with the programming device (hereinafter referred to as a programmer) 1 or offline through the keyboard 2, and then the pattern name is entered into the character buffer 3. The signal is converted by the generator 4 into a signal for driving the laser scanner 6 and a signal for driving the laser device 7 via the laser scanner driver 5 . Next, the laser beam 8 generated by the laser device 7 in response to the signal from the character radiator 4 is reflected by the reflector 11 which is linked to the laser scanner 6 which also operates in response to the signal from the character radiator 4. , and the laser beam is focused on the surface of the workpiece 10 on the mounting table 12 such as a socket by the laser beam condensing lens 9.
The name of the required pattern is sequentially burned onto the surface.
In particular, this work is performed in conjunction with the programmer 1.
In this case, by inputting the name of the bit pattern to the programmer 1 in advance at the same time as the bit pattern to be programmed, the P-
Programming is performed on the ROM via the mounting table 12, and pattern names can be marked at the same time or immediately after the programming is completed.

As described above, according to the present invention, it is possible to mark extremely quickly, reliably, clearly and firmly without causing any damage to the product, and therefore it is possible to mark industrial products mainly using integrated circuits, especially P-ROMs. The effect of the present invention is enormous for the marking of the identification symbol. In addition, although the laser beam was moved in the above embodiment, it is clear that the workpiece may also be moved.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention. 1...Programmer, 2...Keyboard, 3...
Character buffer, 4... Character generator, 5... Laser scanner driver, 6
...Laser scanner, 7...Laser device, 8...
Laser light, 9... Laser condensing lens, 10... Workpiece, 11... Laser reflector, 12... Mounting table.

Claims (1)

[Claims] 1. The programmable read-only memory device, comprising means for controlling the relative position of the programmable read-only memory device and the output light from the laser light source, and means for controlling the output light in conjunction with the position control means. and means for providing a name signal representing the bit pattern corresponding to the bit pattern write signal from the programming device to the control means. Characteristic laser marking device.