JPH03235352A - Imprinting device - Google Patents

Abstract

PURPOSE:To improve the imprinting quality of the title device and reduce the fraction defective by providing an imprinting mechanism section which makes imprinting of a plurality of times to the same object to be imprinted, imprint inspecting mechanism section which inspects imprinted results for quality, and control section. CONSTITUTION:Upon receiving an imprint starting instruction, a control section 17 drives a carrying device 11 by means of a driving device 12 and carries an object 10 to be imprinted to an imprinting mechanism section 13. The section 13 imprints the object 10 when the object 10 comes just below the section 13 and sends the imprinted object 10 to an imprint inspecting mechanism section 16 which inspects the imprint 18 for quality. The object 10 which is discriminated as acceptable as a result of the inspection is sent to the next process after the imprinted ink is cured by heating. The object 10 which is discriminated as unacceptable and on the device 11 is returned to the position immediately below the section 13 by operating the device 12 in the opposite direction by means of the section 17 and the device 13 is instructed to make the imprinting again. At the same time, the number of imprinting is counted. The object 10 which has been imprinted again at the section 13 is again inspected by the section 16. Therefore, the imprinting quality is improved and the fraction defective can be reduced, since imprinting to a defective imprinted object is automatically repeated.

Description

[Detailed Description of the Invention] [Summary] Regarding an automatic stamping machine that stamps the model number etc. on IC packages, etc., for the purpose of improving the stamping quality, the automatic stamping machine stamps the same stamped object multiple times. a stamp inspection mechanism section that inspects the quality of the stamping results; and a control section that controls the number of stampings on the same object by feedback of the judgment results of the stamp inspection mechanism section. Configure it so that it becomes

[Industrial application field]

TECHNICAL FIELD The present invention relates to an automatic stamping machine that stamps a type etc. on an IC package or the like.

Conventionally, semiconductor devices such as IC packages have their model, company name, manufacturing loft number, etc. stamped on the surface of the package, but defects such as scratches and chips may occur in the stamps. These defects have nothing to do with the functionality of the semiconductor device, but when shipped as a single unit, defective products must be reworked due to complaints from users, and the number of man-hours required for rework cannot be ignored, so this countermeasure is necessary. requested.

[Conventional technology]

Conventional methods for stamping model numbers on IC packages, etc. include (a) offset roll method, (b) letterpress method, (C) offset plane method, and (d) offset pad method. ing.

Figure 3(a) shows the offset roll method,
The plate cylinder 1 is designed to stamp a stamp onto a material 3 via an offset roll 2. FIG. 3(b) shows a letterpress method, in which a type stand 5 having type characters 4 is moved up and down to imprint on the object 3 to be imprinted. FIG. 3(C) shows an offset plane method, in which the image is transferred from the plate 6 to a plane pad 7, and this pad 7 is used to stamp the object 3 to be stamped. FIG. 3(d) shows the offset pad method, in which the curved pad 8 is moved from the plate 6.
The image is transferred onto the object 3 to be stamped, and the stamp is pressed onto the object 3 to be stamped.

[Problem to be solved by the invention]

FIG. 3(a) shows the conventional sealing method described above.

In the methods shown in (c) and (d), the offset rubber is in surface contact with the object to be printed, and there is a problem in that it causes electrostatic damage to the semiconductor chip inside the package. In addition, in the letterpress method shown in Figure 3(b), in order to accommodate large packages, it is difficult to make the type surface flat, and if the package printing surface and the type surface are not parallel, the type will hit unevenly and the stamp will be printed. becomes defective. In addition, it is relatively dependent on the printing style, and the contact area of the printing characters is not constant, making stable imprinting difficult. In addition, it is difficult to control the transfer of ink from the printed characters to the surface to be printed, and there are problems such as poor ink transfer in the center of the character line, resulting in hollow spots.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide an automatic stamping device that can improve the quality of stamping.

[Means to solve the problem]

In order to achieve the above object, the stamping device of the present invention includes a stamping mechanism i13 that enables multiple stamping on the same stamped object 10, and a stamping inspection mechanism that inspects the quality of the stamping result. 16, and a control section 17 that controls the number of times of stamping on the same object to be stamped 10 based on feedback of the determination result of the stamp inspection mechanism section 16.

[For production]

The stamping result is inspected by the stamping inspection mechanism section 16, and the stamping object 10 determined to be defective is stamped again, thereby improving the quality of products.

〔Example〕

FIG. 1 is a diagram showing an embodiment of the present invention.

In the figure, 10 is an object to be imprinted (for example, an IC package), and 11 is a conveyance device.The conveyance device 11 is driven by a drive device 12 such as a pulse motor, and the object to be imprinted 10 is moved intermittently from six directions of arrows. It is designed to be transported and can be moved forward or backward. Reference numeral 13 denotes a stamping mechanism section, and the stamping mechanism section 13 is provided in the middle of the conveying device 11, and type letters 14 are placed on the object 10 to be stamped, which is sent by the conveying device and stopped right below the stamping mechanism section 13. The model, company name, manufacturing lot number, etc. are stamped by moving the type stand 15 up and down. 16 again
1 is a seal inspection mechanism section, and the seal inspection mechanism section 16 is disposed in parallel with the stamp mechanism section 13, and has an image recognition device built therein to determine the quality of the stamp 18 stamped on the object 10 to be stamped.

Further, 17 is a control section, and the control section 17 is connected to the drive motor 12 of the conveyance device, the stamp mechanism section 13, and the stamp inspection mechanism section 16.

The operation of this embodiment configured in this way will be explained with reference to the flowchart shown in FIG. 2 and FIG. 1.

First, in response to an instruction to start stamping, the control section 17 causes the drive device 12 to drive the conveying device 11 to convey the object to be stamped 10 to the stamping mechanism section 13 . (2) The stamping mechanism section 13 stamps the stamped object 10 that comes directly below it. Next, the stamped object 1
0 is sent to the stamp inspection mechanism section 16, where the quality of the stamp 18 is inspected. ■If the ink is judged to be good in this inspection, ■the ink is heated and cured and sent to the 0th stage process. If any item is determined to be defective in step (3), the control unit 17 reverses the driving device 12 and transfers the defective item on the conveyor 11 to the marking mechanism unit 1.
Instruct them to put it back directly under 3 and stamp it again. ■Count the number of stamps at the same time. The stamped object 10 that has been stamped again by the stamping mechanism section 13 is inspected again by the stamp inspection mechanism section 16.

In this case as well, good products are sent to the next process via Kinnear, but defective products are stamped and inspected again. The number of repetitions is specified in advance, and if the product does not turn out to be a good product even after repeating the predetermined number of repetitions n, it is put on hold. In this way, by repeatedly marking defective products, clear markings can be made even on objects with poor ink transfer.

In addition, printing defects (defects) such as cut-off characters and blurred characters can be restored to normal. Furthermore, it is possible to deal with cases where the ink is not compatible with the packaging material that is to be printed, and mass production can be facilitated.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to improve the print quality and reduce the defective rate by automatically repeatedly printing defective markings.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is an operational flowchart of the embodiment of the present invention, and FIG. 3 is a diagram showing a conventional marking method used for stamping on IC packages and the like. In the figure, 10 is an object to be stamped, 11 is a transport device, 12 is a drive device, 13 is a stamping mechanism section, 14 is a type, 15 is a type stand, 16 is a stamp inspection mechanism section, 17 is a control section, and 18 is a stamping section. show.

Claims (1)

[Claims] 1. In an automatic stamping machine, a stamping mechanism section (13) that enables multiple stamping on the same stamped object (10), and a stamping inspection mechanism section that inspects the quality of the stamping results. (16) and the same stamped object (10) by feedback of the judgment result of the stamp inspection mechanism section (16).
A stamping device comprising: a control section (17) for controlling the number of times stamping is performed on the stamping device.