JPH0543491Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is a printed wiring board (hereinafter abbreviated as a board).
The present invention relates to an apparatus for manufacturing a substrate, and more particularly to an apparatus for scraping off unnecessary etching resist attached to the front and back surfaces of a substrate during a hole-filling process for a circuit on a substrate having through holes for surface circuit conduction.

[Conventional technology]

Conventionally, as shown in FIG. 3, this type of resist removing apparatus includes a pair of holders 10 that are arranged vertically and are vertically supported at both ends, and a bolt is attached to each holder 10 via a patch plate 11. A pair of strip-shaped squeegee plates 13 made of an elastic body fixed at 12
The tip corner of the squeegee plate 13 is connected to the substrate 1.
They are configured to form an acute angle of about 50 to 60° C. with respect to the conveyance line L of No. 4 and to face each other with an appropriate gap.

Next, the operation will be described. In the hole filling process of the previous process, the resist 15 is filled into the through holes 14a of the substrate 14 using a coating device such as a roll coater (not shown).
When passing through the gap 16 between the tip corners 13a of the pair of squeegee plates 13 along the conveyance line L,
The tip corner 13a of the squeegee plate 13 bends, and the elastic force generated at that time acts on the front and back surfaces of the substrate as squeegee pressure, and as a result, unnecessary resist 15 coated on the front and back surfaces is scraped off.

Note that the tip corners 13a of the pair of squeegee plates 13
When the thickness of the substrate changes, it is necessary to adjust the gap 16 to an appropriate value (about 0.6 mm smaller than the thickness of the substrate 14) by moving one of the squeegee plates 13 vertically each time. be. because,
This is because when the thickness of the substrate 14 changes, the amount of deflection of the squeegee plate 13 changes accordingly, and as a result, the squeegee pressure changes, causing variations in the scraped state of the resist 15.

[Problem that the invention attempts to solve]

In the conventional resist removing apparatus described above, when the substrate is particularly thick, when the tip of the substrate 14 comes into contact with the squeegee plate 13, as shown in FIGS. 4a, b, and c, the squeegee plate 13 The resist 15 scraped and adhered to the inside and the resist 15a applied to the tip of the substrate 14 are pushed out from the gap at the corner of the tip of the squeegee plate 13 and leak (FIG. 4b). As a result, when the tip of the substrate 14 passes through the gap, the resist 15 leaks out from the substrate 14.
A problem arises in that it re-adheres to the tip of 4 and remains (Fig. 4c). Therefore, it was necessary to take the following measures. That is, (a) the re-adhered resist 15 is mechanically removed using a metal brush, an abrasive belt, or the like in a subsequent process.

(b) Masking tape was pasted on the tip of the substrate in advance, and by peeling off the tape later, the resist 1 re-attached to the tape surface.
Remove 5.

Therefore, in the former case, there is a disadvantage that extra man-hours and equipment costs are incurred due to the increase in the number of steps, and in the latter case, similarly, extra man-hours are required for applying and peeling off the tape. However, there are disadvantages such as additional costs for materials and materials.

On the other hand, as shown in FIG. 3, the squeegee plate 13 has a structure in which it is fixed to the holder 10 by tightening several bolts 12 through the backing plate 11, so it has the disadvantage that the following problems are likely to occur. .
That is, (a) the tip corner of the squeegee plate 13 becomes wavy due to the difference in the tightening torque of the bolts 12, and as a result, the resist 15 is scraped unevenly, resulting in uneven removal on the front and back surfaces of the substrate 14. This increases the number of processing steps in the subsequent surface finishing process, and causes quality defects such as circuit pattern disconnections due to resist residue.

(b) Productivity is poor because it takes a lot of time to replace and adjust the squeegee plate 13.

An object of the present invention is to provide a resist removal device that prevents resist leaking from between the squeegees from re-adhering to the tip of a substrate.

[Means for solving problems]

In order to achieve the above object, a resist removing device according to the present invention includes a pair of rotating shafts, a pair of scraping members, a set of a stopper pin and a stopper plate, and a pair of pressing parts. The pair of rotating shafts are rotatably provided at positions equidistant from each other with respect to the substrate transport line, and the pair of scraping members are symmetrically arranged with the substrate transport line sandwiched between the rotating shafts. The squeegee is an elastic rectangular bar and is attached to the tip of the scraping member to scrape off the resist from the substrate. The stopper pin is fixed near the rotation axis. The stopper plate is integrally attached to the rotating shaft and comes into contact with the stopper pin due to the angular rotation of the rotating shaft. Sometimes, the rotating shaft is fixed at a position where the squeegees attached to the pair of scraping members are in close contact with each other on the substrate conveyance line, and the pair of pressing parts is used to adjust the gap between the squeegees. When there is no substrate between the squeegees, the scraping member uses the pressing force to press the stopper plate against the stopper pin to restrict the rotation of the rotating shaft and bring the squeegees into close contact, and when the substrate passes between the squeegees. In this method, the pressing force is loosened to adjust the gap between the squeegees so that they can be expanded at the tip of the substrate.

[Effect]

When the substrate is not present, that is, until the tip of the substrate 14 comes into contact with the squeegee 6, the space between the squeegees 6 is sealed by the pressing force of the cylinder 9, and the resist 1
5 to prevent leakage from between the squeegees. Further, when the substrate 14 passes between the squeegees 6,
Open the space between the squeegees 6 by the thickness of the board, and then remove the board 14.
The excess resist is scraped off by passing through the substrate 1.
This prevents the resist from re-adhering to the tip of No. 4.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

In FIG. 1, the resist removing device according to the present invention includes a pair of rotating shafts 2, 2, a pair of strip-shaped scraping members 8, a set of a stopper plate 4 and a stopper pin 3, and a pair of pressing parts. 9,9.

The pair of rotation shafts 2, 2 are horizontally suspended on the side plate 1, and are rotatably provided at positions equidistant vertically with respect to the conveyance line L of the substrate 14.

A pair of strip-shaped scraping members 8 are attached symmetrically to the two rotating shafts 2, 2 with the conveyance line L of the substrate 14 in between, and include a holder 5, a squeegee 6, and a presser plate 7. There is. The holder 5 is attached to each rotating shaft 2, 2 so as to protrude laterally, and a concave groove 5a is provided at the tip thereof. The squeegee 6 has an elastic square bar shape, and is attached to the holder 5.
The groove 5a is fitted into the groove 5a. The presser plate 7 is attached to the inside of the holder 5, and presses down the squeegee 6 except for the tip corner 6a of the squeegee 6 to securely hold the squeegee 6 in the groove 5a of the holder 5.

The stopper plate 4 is integrally attached to each rotary shaft 2 so as to protrude laterally, and the stopper pin 3 is implanted in the side plate 1 and fixedly provided near the rotary shaft 2. The stopper plate 4 and the stopper pin 3 form a pair, and when the rotating shaft 2 rotates within a certain range, the stopper plate contacts the stopper pin 3, and the tip corner 6a of the squeegee 6 is brought into contact with the conveyance line L of the substrate 14. Approximately 50 each
The rotating shafts 2 are fixed at positions where they are in close contact with each other with an acute angle of ~60°.

The pair of pressing parts have cylinders 9 for pressing (squeegee pressure), and each cylinder 9 is connected to each scraping member 8 to adjust the gap between the squeegees 6. Board 1 between
4 is absent, a pressing force is applied to the scraping member 8 to press the stopper plate 4 against the stopper pin 3 to restrict the rotation of the rotary shaft 2 and bring the squeegees 6 into close contact, so that the substrate 14 is placed between the squeegees 6. When passing, the pressing force is loosened to adjust the gap between the squeegees 6 so that they can be expanded at the tip of the substrate 14.

Next, the operation will be explained with reference to FIG. , the pressing force P of the cylinder 9
The stopper plate 4 and stopper pin 3 are
are in contact with each other, and the tip corners 6a of the squeegee 6 are held in close contact with each other (see FIGS. 2a and 2b). Therefore, when the tip of the substrate 14 comes into contact with the squeegee 6, the resist 15 and the substrate 1 are scraped off and adhered to the inside of the squeegee 6.
This can prevent the resist 15 applied to the tips of the squeegees 4 from leaking out from between the tip corners 6a of the pair of squeegees 6 (see FIG. 2b).

Next, until the substrate 14 finishes passing through the tip corner 6a of the squeegee 6, the tip corner 6a of the squeegee 6 is
is always held between the front and back surfaces of the substrate 14 by a constant pressing force (ie, squeegee pressure) by the cylinder 9. As a result, unnecessary resist 15 coated on the front and back surfaces of the substrate is scraped off with the tip corner 6a of the squeegee 6 (see FIG. 2c).

As mentioned above, in this embodiment, the shape of the squeegee 6 is a regular square bar, but a square bar such as a regular triangular bar is also effective.

In this embodiment, the squeegee 6 is attached to the concave groove 5 of the holder 5.
It can be installed by simply fitting it into a.
Since it can be installed in a short time and with high precision, it improves productivity by reducing the time required to replace the squeegee, and improves the unevenness of resist removal on the front and back surfaces of the board by improving the installation accuracy of the squeegee, improving quality. be able to.

[Effect of idea]

As explained above, according to the present invention, since the space between the squeegees is sealed by the pressing part until the tip of the substrate comes into contact with the squeegee, it is possible to prevent part of the resist from leaking from between the squeegee. Therefore, it is possible to prevent leaked resist from re-adhering to the tip of the substrate. Furthermore, when the tip of the substrate comes into contact with the squeegee, the pressing force is loosened by the pressing part, and the gap between the squeegees is pushed open by the tip of the substrate, and the substrate passes between the squeegees, making it possible to scrape off the resist on the substrate. . Moreover, since the squeegee is shaped like a square rod, the resist is scraped off uniformly without waving, and uneven removal on the front and back surfaces of the substrate can be eliminated, making it possible to manufacture high-quality printed wiring boards.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the resist removing apparatus of the present invention, and FIGS. 2 a, b, and c are sectional views showing the state of scraping and removing the resist coated on the front and back surfaces of the substrate.
FIG. 3 is a side cross-sectional view of a conventional resist removing apparatus, and FIGS. 4a, b, and c are cross-sectional views showing the state of scraping off the resist coated on the front and back surfaces of a substrate. DESCRIPTION OF SYMBOLS 1... Side plate, 2... Rotating shaft, 3... Stopper pin, 4... Stopper plate, 5... Holder, 6... Squeegee, 7... Holding plate, 8... Scraping member, 9... Cylinder (pressing part).

Claims (1)

[Claims for Utility Model Registration] A resist removing device having a pair of rotating shafts, a pair of scraping members, a set of a stopper pin and a stopper plate, and a pair of pressing parts, the pair of rotating shafts comprising: The scraping members are rotatably installed at equal intervals with respect to the substrate transport line, and the pair of scraping members are symmetrically attached to the rotating shaft with the substrate transport line in between, and each has a squeegee. The squeegee is an elastic square bar-shaped and is attached to the tip of the scraping member to scrape off the resist from the substrate. The stopper pin is fixedly provided near the rotation axis. The stopper plate is integrally attached to the rotating shaft and comes into contact with the stopper pin due to the angular rotation of the rotating shaft, and when the stopper pin and stopper plate make a pair, a pair of scraping The rotating shaft is fixed at a position where the squeegee attached to the member is in close contact with the substrate conveyance line, and the pair of pressing parts are used to adjust the gap between the squeegees, so that there is no substrate between the squeegees. In this case, use the pressing force on the scraping member and press the stopper plate against the stopper pin to restrict the rotation of the rotating shaft and make the squeegees come into close contact, and when the substrate passes between the squeegees, loosen the pressing force. A resist removing device characterized in that the gap between the squeegee can be adjusted to be expandable at the tip of the substrate.