JPH0343704A - Structure of connecting part of printed circuit board - Google Patents

Abstract

PURPOSE:To allow the sufficient passage of a high-speed signal by providing a reflection mirror for connection between optical waveguides to transmit and receive the optical signal between the optical waveguide of a mother board and the optical waveguide of a printed circuit board by changing direction between these optical waveguides. CONSTITUTION:The reflection mirror 3B for connection between optical waveguides to transmit and receive the light signal between the optical waveguide 1A of the mother board 1 and the optical waveguide 3A of the printed circuit board 3 by changing direction between these optical waveguide is provided in the connecting end part of the printed circuit board 3 with the mother board 1. The part installed with the reflection mirror 3B of the printed circuit board 3 in the state shown in the figure is inserted into a connector part 2 in order to connect the printed circuit board 3 to the mother board 1. The printed circuit board 3 can then be connected to the mother board 1 in the state orthogonal therewith. The optical signal from the optical waveguide 1A of the mother board 1 is changed in direction by the reflection mirror 3B and is introduced into the optical waveguide 3A of the printed circuit board 3 in this connection state. The transmission and reception of the signal in the connecting part of the printed circuit board are executed by using the optical signal in this way and, therefore, the high-speed signal can sufficiently pass the connecting part of the printed circuit board.

Description

[Detailed Description of the Invention] [Summary] With regard to the structure of the part where the co-printed board is connected to the motherboard, the purpose of this invention is to use optical signal processing technology to sufficiently pass high-speed signals. a motherboard having an optical waveguide, and a printed board that is connected to the motherboard by being inserted into the motherboard in a direction crossing the motherboard through a connector portion, and a connecting end of the printed board to the motherboard. In addition, a reflecting mirror for connecting optical waveguides is provided for changing the direction and exchanging optical signals between the optical waveguides of the motherboard and the optical waveguides of the printed circuit board.

[Industrial Field of Application] The present invention relates to a structure for connecting a printed circuit board to a motherboard.

In various electronic devices, from the viewpoint of maintenance inspection and mounting technology, each group of circuits with the required functions is mounted on a printed board, and these printed boards are connected to each other by inserting them into a connector section with a motherboard. ing.

[Prior Art] FIG. 3 is a cross-sectional view showing a conventional printed circuit board connection structure. In FIG. An electrical connector portion 102A is provided which is electrically connected to the conductive pattern 101A. Here, the connector part 102A and the motherboard 1
The connection with the conductive pattern 101A of 01 is made as follows. That is, a through hole 10IB is formed in the motherboard 101, a pin 102A-1 of the connector portion 102A is inserted into the through hole 101B, and then solder or the like is poured into the through hole 01B.

Reference numeral 103 denotes a printed board having a required conductive pattern 103A formed on its surface, and this printed board 103 is provided with an electrical connector portion 102B electrically connected to the conductive pattern 103A. Here, the connector part 102B and the conductive pattern 103A of the printed board 103
Also the connection with.

This is done by forming a through hole 103B in the printed board 103, inserting the pin 102B-1 of the connector portion 102B into the through hole 103B, and then pouring solder or the like into the through hole 103B.

By the way, the connector parts 102A and 102B are configured so that they can be fitted to each other via the uneven parts, and in this fitted state, the pins 102A-1 and 102B-1 are electrically connected. There is.

In this way, the printed board 103 is attached to the motherboard 10.
It is possible to connect in a direction crossing 1.

[Problems to be Solved by the Invention] However, in the printed board connection structure performed using such a conventional electrical method, the connector parts 102A, 10
2B, impedance matching may not be achieved properly (mismatching), and when such mismatching occurs, a problem arises in that high-speed signals of 200 MHz to 300 MHz or higher cannot pass through the connector sections 102A and 102B. be.

The present invention aims to solve these problems, and aims to provide a printed circuit board connection structure that can sufficiently pass high-speed signals by using optical signal processing technology. do.

[Means for Solving the Problems] Therefore, the printed board connection structure of the present invention includes a motherboard having an optical waveguide, and a connector part connected to the motherboard in a direction crossing the motherboard. A printed board that is connected by being inserted is provided, and an optical signal is exchanged by changing direction between the optical waveguide of the motherboard and the optical waveguide of the printed board at the connection end of the printed board with the motherboard. The present invention is characterized in that a reflecting mirror for connection between optical waveguides is provided to perform this.

[Function] With the above-described configuration, in the printed board connection structure of the present invention, when the printed board is connected by being inserted into the connector part of the motherboard, the optical waveguide of the motherboard and the printed board are connected by the reflective mirror attached to the printed board. It becomes possible to exchange optical signals with the optical waveguide by changing the direction. This connects the optical waveguides on the motherboard and printed board.

[Example code] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of the present invention. In this embodiment, as shown in FIG. 1, a motherboard 1 having an optical waveguide 1A is provided. A printed circuit board 3 is connected to the motherboard 1 via a connector section 2 so as to be inserted in a direction crossing (orthogonal to) the motherboard 1 . Note that an optical waveguide 3A to be connected to the optical waveguide 1A of the motherboard 1 is formed on the printed board 3.

By the way, at the connection end of the printed board 3 with the motherboard 1, there is an optical waveguide between the optical waveguides 1A of the motherboard 3 and the optical waveguides 3A of the printed board 3 for changing the direction and exchanging optical signals. A connection reflecting mirror 3B is provided.

With the above-described configuration, in order to connect the printed board 3 to the motherboard 1, it is sufficient to insert the reflective mirror 3B installed portion of the printed board 3 in the state shown in FIG. 2 into the connector section 2. Thereby, the printed circuit board 3 can be connected perpendicularly to the motherboard as shown in FIG. and.

In the connection state shown in FIG. 1, the optical signal from the optical waveguide 1A of the motherboard 1 is redirected by the reflecting mirror 3B,
The light is introduced into the optical waveguide 3A of the printed board 3. Conversely, the optical signal from the optical waveguide 3A of the printed board 3 is changed direction by the reflecting mirror 3B and introduced into the optical waveguide 1A of the motherboard 1. In this way, since signals can be sent and received at the printed board connection using optical signals, the problem of mismatching does not occur, and this allows high-speed signals to pass through the printed board connection.6 Note that, as shown in FIG. 2, when the printed board 3 is not inserted into the motherboard 1, the optical signal passing through the optical waveguide 1A of the motherboard 1 passes through the connector section 2 as indicated by arrow A.

[Effects of the Invention] As detailed above, according to the printed board connection structure of the present invention, there is a direction between the optical waveguide of the motherboard and the optical waveguide of the printed board at the connection end of the printed board with the motherboard. With a simple configuration that includes a reflective mirror for connecting optical waveguides to exchange optical signals by changing the Optical signal technology can be cleverly applied to printed circuit board connections.
There is an advantage that high-speed signals can be sufficiently passed through the printed board connection.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a state before a printed board is inserted into a motherboard, and FIG. 3 is a sectional view showing a conventional example. In the figure, 2 is a motherboard, 1A is an optical waveguide, 2 is a connector section, 3 is a printed board, 3A is an optical waveguide, and 3B is a reflecting mirror.

Claims (1)

[Claims] A motherboard (1) having an optical waveguide (1A), and a motherboard (1) having an optical waveguide (3A) that intersects with the motherboard (1) via a connector portion (2). Printed board (3) connected by being inserted in the direction
), and an optical waveguide (1A) of the motherboard (1) is provided at the connection end of the printed board (3) to the motherboard (1).
and the optical waveguide (3A) of the printed board (3), further comprising an inter-optical waveguide connecting reflector (3B) for changing the direction and exchanging optical signals between the optical waveguide (3A) and the optical waveguide (3A) of the printed board (3). Printed board connection structure.