JPH019954Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an apparatus for photoprinting multilayer boards.

A common method for manufacturing multilayer boards is the so-called pin lamination method, in which reference holes are provided in advance in substrates for inner and outer layers, and positioning is performed using the reference holes during multilayer molding. In this method, a photosensitive resin film is provided on the front and back surfaces of a multilayer board, a negative film is closely attached using a reference hole, and a circuit is formed by photo printing. Conventionally, the method of photo printing involves aligning the multilayer plate 2 and the upper and lower negative films 3, 3' using a thin pin 1 on the seat.
A method of exposing to light through a polyester film 4 and a transparent substrate 5 (glass plate) (FIG. 1), and forming a recess 6 by counterboring the pin 1 part in advance on the lower transparent substrate 5' (acrylic plate), A method is known in which a pin 1 is inserted into the recess for positioning and photo printing in the same manner (FIG. 2). However, the former method has the disadvantage of poor positioning accuracy due to the deformation of the area around the pin due to the thickness of the seat during vacuum sealing, while the latter method improves positioning accuracy, but requires the removal of the upper negative film after each printing. It is necessary to remove the multilayer plate, insert the next multilayer plate into the pin, and set the film. This applies excessive force to the reference hole of the film, increasing the diameter of the reference hole, resulting in poor workability and poor positioning accuracy. There are drawbacks that make it worse.

The present invention overcomes these drawbacks.
That is, the present invention is a device for printing double-sided photographs of multilayer boards, and has upper and lower transparent substrates for exposure that can be opened and closed, and upper and lower negative films in contact with the inside of each of the substrates, with the lower substrate being used for printing. A reference pin for positioning a negative film on a multilayer board, the pin having a peripheral portion flush with the board;
One end of the lower negative film is fixed by the reference pin, and the opposite end is fixed to the end of the upper negative film via a base having a thickness equivalent to that of the multilayer board, and the fixing This multilayer photographic printing device is characterized in that the upper and lower negative films can be opened and closed using the base as a fulcrum.

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

FIG. 3 shows one embodiment of the present invention,
The upper and lower negative films 3, 3' are aligned and fixed at their ends via a fixed base 7, which has the same thickness as the multilayer board to be printed, and the upper and lower films can be opened and closed using the fixed base 7 as a fulcrum. It is free.
The lower film 3' has a reference hole, and is fixed to the lower substrate 5' by inserting a reference pin provided on the lower substrate 5' into the reference hole. On the other hand, the upper film 3 is not fixed by the reference pin. The peripheral part of the reference pin 1 is connected to the lower substrate 5'.
In FIG. 3, a recess is provided in the lower substrate 5', and a jig having a reference pin 1 is inserted and fixed into the recess. Two or more reference pins are required to fix the lower film 3'. When a recess is provided in the lower substrate and a jig having a reference pin is inserted into the recess, it is preferable for accuracy to use a jig that integrates a plurality of reference pins, and FIGS. 4 to 6 illustrate this. It is something.
Figures 4 to 6 are plan views of the lower substrate 5', Figure 4 is an example using two reference pins, Figures 5 to 6 are examples using four reference pins, and Figure 7 is an example using a negative film fixing base. show. In FIGS. 4 and 5, the jig 8 has two reference pins 1, and in FIG. 6, it has four. When four reference pins are used, the embodiment shown in FIG. 6 is preferable.
In these cases, a plastic plate such as an acrylic plate is usually used as the lower substrate 5' in consideration of ease of processing and transparency.

In FIG. 3, the film 3' is fixed to the lower substrate 5' by reference pins, and although it is not necessary to adhere the film 3' to the substrate, it may be adhered to the substrate if necessary. Further, the upper substrate 5 is provided with a recessed portion, if necessary, at a portion corresponding to the reference pin portion of the lower substrate 5'.

When printing the multilayer board, open the upper substrate 5 and the film 3 above, insert the reference pin 1 into the reference hole of the multilayer board to fix the multilayer board, and after placing the film 3 and the upper board 5, expose from above and below. It can be baked.

Since the device of the present invention does not fix the upper negative film with a reference pin, there is no need for excessive force to be applied to the reference hole portion of the film when setting a multilayer board, etc., as in the conventional case, and the positioning accuracy does not deteriorate.
It also has the advantage of being easy to operate and having good workability.

[Brief explanation of drawings]

Figures 1 to 2 are cross-sectional views of a conventional photo printing device, Figure 3 is a cross-sectional view of the device of the present invention, and Figures 4 to 6 are plan views of the lower substrate. The symbols in the figures are as follows. It is. 1...Reference pin, 2...Multilayer board, 3, 3'...
Negative film, 4...polyester film,
5, 5'...Transparent substrate, 6...Recessed portion, 7...Fixed base, 8...Jig having a reference pin.

Claims (1)

[Scope of claims for utility model registration] (1) An apparatus for printing double-sided photographs of multilayer boards,
It has upper and lower transparent substrates that can be opened and closed for exposure, and upper and lower negative films in contact with the inside of each substrate, and the lower substrate is a reference pin for positioning the multilayer board and the negative film to be printed. Equipped with a pin whose periphery is flush with the board,
One end of the lower negative film is fixed by the reference pin, and the opposite end is fixed to the end of the upper negative film via a fixing base having a thickness equivalent to that of the multilayer board. A multilayer photoprinting device characterized by a structure in which upper and lower negative films can be opened and closed using a fixed base as a fulcrum. (2) The photographic printing device according to claim 1, wherein the lower substrate has a recess, and a jig having a reference pin is inserted and fixed into the recess. (3) The photographic printing device according to claim 2, which uses a jig having a plurality of reference pins.