JPS5844608Y2 - Jig board for multilayer adhesion of printed circuit boards - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multilayer adhesive jig plate for multilayer printed circuit boards.

Multilayer printed circuit boards are generally produced by forming an inner layer pattern on a copper-clad laminate, then sandwiching a semi-cured adhesive (prepreg) made by impregnating glass cloth with resin and fixing it individually using guide pins and a jig board. Then, use an adhesive press to bond the multiple layers together while applying heat and pressure.

Adhesion is broadly divided into hot press methods, in which the temperature of the press platen is raised from the beginning, and cold press methods, in which the temperature is raised from room temperature.

The adhesion temperature affects the time from when the prepreg resin melts until it hardens, as well as the viscosity, and if the molten state of the prepreg resin is not appropriate, it may cause defects such as adhesive voids and peeling.

In order to make the molten state of the prepreg resin appropriate, it is necessary to control the heating rate of the prepreg layer to be bonded and to reduce the temperature variation.

One way to do this is to change the material and thickness of the jig plate, but in most cases, as shown in Figure 1, a cushioning material 2 made of kraft paper or a sandwich of rubber and cloth is placed between the press heating plate 1 and the jig plate. In many cases, temperature rise is controlled by using it between the filling plates 3.

As shown in Fig. 1, the conventional bonding method using cushioning materials involves aligning the inner layer base material 4 and the prepreg 5 with overlapping guide pins 6, fixing them with a jig plate 3, and pressing them onto a press hot plate. Cushion material 2 is sandwiched between 1 and jig plate 3, and multilayer bonding is performed while heating and pressurizing.

In this case, since the cushion and the jig plate are not integrated, the workability when setting on the press heating plate is very poor.

In addition, the cured resin that flows out of the guide hole adheres to the cushioning material, making cleaning difficult and easily damaging it, requiring periodic replacement.

The purpose of the present invention is to solve the above-mentioned conventional problems and provide a jig plate that has good workability and is free from adhesion of dust and spilled resin.

The feature of this invention is that a cushioning material is sandwiched between metal jig plates to form an integral structure.

As shown in Fig. 2, an embodiment of the present invention is shown, a bonding jig is made by sandwiching a cushioning material 2 between metal jig plates 3 and 3' and securing them with screws 8, etc. to form an integral structure. As a plate, an inner layer base material 4 and a prepreg 5 are stacked and aligned with guide pins 6, and then fixed and bonded in multiple layers.

Conventionally, the resin melted during adhesion flows through the guide hole 7.
Since it flows out of the jig and adheres to the cushion 2, cleaning is required to remove it after the work is completed, and it also slides on the heating plate 1, causing damage, so it must be replaced regularly. However, according to the present invention, since the cushion 2 is covered with the metal plates 3 and 3', it can be used semi-permanently without damage.

Furthermore, since it has an integrated structure, it has advantages such as good workability when setting it on a press heating plate.

[Brief explanation of the drawing]

FIG. 1 is a side view showing multilayer bonding using a conventional multilayer bonding jig plate, and FIG. 2 is a side view showing multilayer bonding using the jig plate of the present invention. 1...Press heating plate, 2...Cushion, 3.3'...Jig plate, 4...Inner layer board, 5...・Prepreg.

Claims (1)

[Scope of utility model registration request] Multi-layer bonding of printed circuit boards, which is a jig plate used when bonding the inner layer base material and the adhesive prepreg by applying pressure and heating, and having an integrated structure by sandwiching a cushioning material between the metal plates. jig board.