JPH0453023Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to improving the liquid repellency of a device that performs liquid processing such as development and etching by spraying a developer, etching liquid, etc. onto a printed circuit board. be.

[Prior Art] Conventionally, as such a device, there has been one shown in FIG. 5, for example. This device is a device for developing, etching, and washing printed circuit boards.

In the figure, 1 is a chain-type board transport means for transporting the printed circuit board 2 in the A direction, and a gear 3 that rotates, a chain 4 on which the gear 3 is attached, and a chain-type board transport means arranged along the transport path of the printed circuit board 2. The friction roller 5 rotates with the power of a gear 3 and conveys the printed circuit board 2 through a chain 4.

6 is a developing section, 7 is an etching section, and 8 is a washing section, each of which receives printed circuit boards 2 that are sent.
Spray injectors 61 arranged on the upper and lower sides of the
71, 81 and 62, 72, 82 are provided.

In the developing section 6, etching section 7 and washing section 8,
A developing solution, an etching solution, and water are sprayed onto the upper and lower surfaces of the printed circuit board 2 using spray injectors placed on the upper and lower sides, thereby performing development, etching, and water washing.

[Problems to be solved by the invention] In such a device, the orientation of the printed circuit board that is sent does not change, so as shown in Figure 6, the developer or etching solution is not deposited in the center of the top surface of the printed circuit board. It stays a little. This retention part 2
No. 1 had a problem in that compared to the lower and upper surfaces of the substrate where the liquid drains well, poor development and etching occur, resulting in variations in the quality of pattern formation.

The present invention has been made to solve these problems, and an object of the present invention is to realize a liquid treatment device for a printed circuit board that has good liquid repellency for the liquid sprayed onto the printed circuit board.

[Means for solving the problem] The present invention places spray injectors above and below the printed circuit board that is fed in a fixed direction, and these spray injectors inject liquid onto the printed circuit board. In an apparatus for liquid processing, the substrate supporting means rotatably supports the printed circuit board, and the upper and lower spray injectors are moved in opposite directions to each other so as to be located on one end side of the rotational fulcrum of the printed circuit board. A liquid processing device for a printed circuit board, comprising: an injector moving means that injects liquid onto the upper surface and the lower surface at the other end to roll the printed circuit board and flush away the liquid accumulated on the board. .

[Example] The present invention will be explained below with reference to the drawings.

FIG. 1 is a diagram illustrating a main part of an embodiment of a liquid processing apparatus for a printed circuit board according to the present invention. This figure shows the structure of the etching section. In Figure 1,
Components that are the same as those in FIG. 5 are given the same reference numerals.

In FIG. 1, reference numeral 9 denotes a fixing jig as a board supporting means, and as shown in FIG. 2, it consists of a frame 91 for housing the printed circuit board 2, and shafts 92 and 93 provided on both sides of the frame 91. The fixing jig 9 is
It is rotatably supported by the transport section of the substrate transport means with shafts 92 and 93 as fulcrums. The supported state is shown in FIG.

In FIG. 3, reference numerals 41 and 42 are conveyance units that move in the direction of feeding the printed circuit board (direction A). shaft 92,
Reference numeral 93 indicates the shaft support portion 4 provided in the conveyance portions 41 and 42.
3, 44, whereby the fixing jig 9
are rotatably supported by the transport sections 41 and 42. The conveyance units 41 and 42 move in a direction perpendicular to the paper plane of FIG. The conveyance units 41 and 42 are moved, for example, by applying power to rotationally driven rollers to the conveyance unit using a belt, or by applying power to rotationally driven gears to the conveyance unit through a chain.

Returning to FIG. 1 again, 73 and 74 are spray units to which a plurality of spray injectors 71 and 72 are attached, and 75 and 76 are spray units 73 and 7.
4 in the BB' direction. These moving means move the spray injectors 71 and 72 in opposite directions, for example, when spray unit 73 is moved in direction B, spray unit 74 is moved in direction B'.

Next, the operation of such a device will be explained.

FIG. 2 is a flowchart showing the operating procedure of the apparatus shown in FIG.

In FIG. 2, first, the printed circuit board 2 is set on the fixture 9.

Next, the set substrate is sent by the conveyors 41 and 42 to the upper spray injector 71 and the lower injector 7.
Place it between 2.

Here, the upper and lower spray injectors 71 and 72 start spraying.

Thereafter, the spray units 73 and 74 begin to be horizontally oscillated in opposite directions. This horizontal swing moves one of the spray units 73 and 74 in the B direction and the other in the B' direction, and then one of the spray units 73 and 74 is moved in the B' direction.
Move the other one in the direction B' and the other in the direction B. As a result, the etching liquid is sprayed onto the top surface of the printed circuit board 2 on one end side of the shafts 92 and 93 (fulcrum) and the bottom surface of the printed circuit board 2 on the other end side. After that, an etching liquid is sprayed onto the lower surface of the printed circuit board 2 at one end and the upper surface of the printed circuit board 2 at the other end. Then, such injection is repeated alternately.

Due to the jet force of the liquid, the printed circuit board 2 is moved to C- for each fixing jig 9 as shown by the solid line and broken line in FIG.
Roll in the C′ direction. The injection force applied by the injector to cause the substrate to roll in this manner is referred to as eccentric pressure.

This rolling causes the etching liquid sprayed onto the printed circuit board 2 to flow down from the substrate, thereby preventing the liquid from remaining on the substrate.

In FIG. 4, the start of spraying from the spray injector and the start of horizontal swinging of the spray unit may be performed at the same time or in the reverse order as shown in FIG.

Furthermore, the configuration shown in FIG. 1 may be applied not only to the etching section mentioned in the embodiment, but also to a developing section, a washing section, and a resist stripping section for removing resist remaining after etching. Furthermore, the present invention may be applied to an apparatus that performs various chemical treatments such as degreasing, pickling, and neutralization treatments on printed circuit boards using a spray injector.

Furthermore, the moving direction of the conveyance units 41 and 42 is not limited to the direction perpendicular to the paper plane of FIG. 1, but may be the same direction as the swinging direction of the spray injector.

[Effects] According to the present invention, since the printed circuit board is rolled by the eccentric pressure of the spray injector, the liquid sprayed on the circuit board does not stay on the circuit board, and the liquid drainage property is significantly improved. This greatly eliminates defects in development, etching, etc., and improves quality.

In addition, since the apparatus according to the present invention does not require a separate process for removing liquid accumulated on the substrate, processing time can be significantly shortened by using the apparatus in chemical treatment or water washing processes.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts of an embodiment of a liquid processing device for printed circuit boards according to the present invention, FIG. 2 is a block diagram of a substrate support means of the device shown in FIG. 1, and FIG. 3 is a block diagram of the substrate of FIG. 4 is an explanatory diagram of the operation of the device shown in FIG. 1; FIG. 5 is a diagram showing the configuration of an example of a conventional liquid processing device for printed circuit boards;
FIG. 6 is a diagram showing the state of a printed circuit board processed by the apparatus shown in FIG. 2...Printed circuit board, 41, 42...Transportation section,
6... Developing section, 7... Etching section, 8... Washing section, 61, 62, 71, 72, 81, 82... Spray injector, 9... Substrate supporting means, 92, 93
……shaft.

Claims (1)

[Scope of Utility Model Registration Claim] In a device that treats a printed circuit board with liquid by disposing spray injectors above and below a printed circuit board that is fed in a certain direction, and spraying a liquid onto the printed circuit board with these spray injectors. , board support means for freely supporting the printed circuit board; and the upper and lower spray injectors are moved in opposite directions to the upper surface and the other end of the printed circuit board at one end and the other end relative to a rotational fulcrum of the printed circuit board, respectively. A liquid processing device for a printed circuit board, comprising: an injector moving means for rolling the printed circuit board by jetting a liquid onto a certain lower surface, and washing off the liquid accumulated on the board.