JPS6140984B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a glass photomask used for manufacturing printed circuit boards, etc., in which guide holes are provided at the same position relatively to the photomask and the object to which it is transferred, and pins are inserted into the guide holes. After aligning the photomask and the transferred object through the
This is a method of manufacturing a glass photomask used in a method of transferring printed circuits etc. drawn on a photomask.

Conventionally, guide holes were formed in a glass dry plate, which is a material for a glass photomask, by either directly drilling holes in the glass, or by filling the guide holes of the glass dry plate with metal and drilling the holes with a machine tool such as a jig borer. However, with the method of directly drilling holes in the glass, the accuracy of the drilled guide holes is poor due to the poor machinability of the glass, and with the method of embedding metal in a glass dry plate and drilling the holes, the guide holes cannot be formed with high precision. Machine tools are required, especially as the size of printed circuit boards and their manufacturing work has increased recently, and the guide machine tools have also become large, making them very expensive. The drawback is that it takes a long time to attach the photomask to a machine tool and machine the guide holes in accordance with the printed circuit, making the glass photomask very expensive.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a glass photomask that can easily and inexpensively form guide holes with high precision in a glass photomask. A feature of the present invention is that a hole is made in a glass dry plate on which a printed circuit is drawn, and a bushing with a hole corresponding to a guide hole is fixed in the hole with resin etc. with precision using a bushing embedding surface plate. By doing so, guide holes are formed in the glass dry plate.

An embodiment of the present invention will be described below with reference to the drawings. First, as shown in FIG. 1, a blank hole 3 is made in a portion of the glass dry plate 1 on which the printed circuit 4 and alignment mark 2 are drawn, corresponding to the guide hole. The diameter of the hole 3 should be approximately 10 mm larger than the outer diameter of the bush 5 that will be embedded in the subsequent process.

Next, as shown in FIG. 2, this glass dry plate 1 is placed on the bush-embedded surface plate 8, and the positioning mark 2 of the glass dry plate 1 and the positioning mark 2' of the bush-embedded surface plate 8 are overlapped. Glass dry plate 1
After aligning the bush-embedded surface plate 8 with
Insert the bushing 5 with a hole corresponding to the guide hole into the pin 7, insert it into the guide hole 9' of the bushing embedded surface plate 8 of the pin 7, and fill the bushing 5 with an epoxy resin filling adhesive 6 (for example, With Nippon Devcon Co., Ltd. (product name: Devcon AQ), make a hole in the glass drying plate 1.
Fixed to.

Note that the outer periphery of the bushing 5 is provided with unevenness by knurling or the like. Thereafter, by removing the pin inserted into the bush 5, a glass photomask having a guide hole 9 as shown in FIG. 3 is obtained.

As described above, according to the present invention, guide holes with good positional accuracy can be formed simply and at low cost.

[Brief explanation of the drawing]

Figure 1 is a plan view of the glass dry plate with printed circuits and alignment marks drawn on it after holes have been made, and Figure 2 is the glass dry plate with the buttons fixed to the glass plate with resin. FIG. 3 is a cross-sectional view of a bush-embedded surface plate, and FIG. 3 is a plan view of a completed glass photomask having guide holes. Explanation of symbols, 1... Glass dry plate, 2, 2'...
Alignment mark, 3... stupid hole, 4... area where printed circuit is drawn, 5... bushing, 6... embedded resin, 7... pin, 8... bush embedded surface plate,
9,9'...Guide hole.

Claims (1)

[Claims] 1. A photomask on which a printed circuit is drawn and a transfer target to which the printed circuit of the photomask is transferred have guide holes at the same relative positions, and a pin is inserted into the guide hole to overlap the photomask and the transfer target. A method for manufacturing a photomask used in a photo printing method for transferring a printed circuit of a photomask onto an object to be transferred, the method comprising forming a guide hole portion of a glass dry plate with a mark for alignment on the glass dry plate with a diameter larger than the guide hole. A hole having a hole is made, and the glass dry plate is placed on a surface plate provided with an alignment mark and a guide hole at the same position relative to the alignment mark on the glass dry plate, and using the alignment mark, Align the glass dry plate and surface plate,
Insert a pin into a bushing with a hole of the same diameter as the guide hole, insert the pin and bushing into the blank hole of the glass dry plate and the guide hole of the surface plate, and pour adhesive into the gap between the bushing and blank hole. A method for producing a glass mask, comprising: fixing a bush to a glass dry plate; removing the pin; and forming a guide hole in the glass dry plate.