JPS59188191A - Metal core circuit board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field and Background Art] The present invention relates to a metal core wiring board having a core of scrap metal;
In particular, it applies to metal core wiring boards used for interconnecting wiring boards or wiring boards and electronic components.

() [Freeze, the connection between printed wiring boards is 93-1
[1 and 21), As shown in Figure 2, a pin 3' is provided on one printed wiring board 71', board 1, and a jack 5 that engages with the pin 3 on the other printed wiring board 2 and a pin 3' are provided on the other printed wiring board 2. This is accomplished by connecting a connector consisting of a jack 5 and a housing 6 with a metal wire 4, and engaging the pin 3 with the jack 5 of the connector. In this case, since the peripheral portion of the connector is only an empty package or a plastic housing, it is not possible to control the characteristic impedance of the signal line in the connector portion.

Furthermore, as the density of printed wiring boards increases, the density of connectors also increases, and the spacing between pins becomes larger, resulting in greater crosstalk between pins. In order to prevent this, it is possible to increase the ratio of the number of ground pins and power supply pins to the number of signal fins, but if the ratio is increased, the number of signal bins will decrease/IL, and the signal fins will not be sufficient. You will not be able to give your child a gift. Furthermore, due to the increase in the number of connector bins due to high density, the length of pins or jacks etc. has become longer, which has the disadvantage that noise is added to the waveform during signal transmission, and the propagation delay time is also longer. .

[Disclosure of the invention]

The present invention has been made in view of the above-mentioned circumstances, and is made by bending a substrate having a metal plate as a core at a certain angle.
In addition to providing through poles on both sides of the bend, -
By connecting the through-holes on one side and the through-holes on the other side using a vertical turn formed on the outer layer of the board or a metal core on the inner layer of the board, the 4IIr impedance of the signal line at the connector part can be controlled and the printed wiring boards can be connected to each other. By removing the 4i mismatch in the connections, minimizing the noise on the waveform in the signal transmission path, and reducing the propagation delay time t4)<L, the crosstalk between the signal lines. The object of the present invention is to disclose a metal core wiring board with a small l-.

[Example legs, light]

Regarding the embodiments shown in FIGS. 3 to 6, FIG. 3 is a perspective view of an embodiment of the metal core wiring board of the present invention. In the drawings, reference numeral 7 denotes a substrate whose central portion is bent at a substantially right angle. 8 is a through hole, with the bent part of the substrate 7 shaped like a camellia, and kidney holes on both sides. 9 is a pattern formed on the outer layer of the substrate 7. The through holes 8 are, for example, provided in rows a to d on one side of the substrate 7 with the bent portion as a boundary, and in rows e to h on the other side. These through-holes 8 are connected by a pattern 9 on the front side in rows a and 0, rows 0 and g, and those in rows 1) and f, and rows d and h are not shown. Connected with a back collar turn. Note that the portions other than the through holes 8 are coated with 1/cyst h6, and the pattern 9 is insulated. Also, when the number of through holes 8 is small and the wiring density is low, the pattern 9 does not necessarily need to be formed on both sides of the board, and may be formed only on either side. This can be done by increasing the number of .

Next, Fig. 4 (A1-(Dll) and Fig. 5 (A1-(Dll)
), the means for forming the through hole 8 will be explained. In FIGS. 4A to 4D, a hole is made in a core 1o made of a metal plate, and the core 1o is covered with an epoxy resin 11 or the like.

Instead, after performing through-hole plating 12 on the holes and forming a pattern, resist is applied to areas other than the through-holes? Perform edge treatment. Also, Fig. 5 (A) - (
D) For the K trigram, epoxy (Y1 fat 11
After covering the metal core 11, a hole is drilled, and through-hole plating 12 is applied to the hole to form a through-hole connected to the metal core 11. In this way, through-holes (including 4) connected by the pattern and through-holes (ji+, 5) connected by the metal core are formed. By connecting the 1-1 metal core to a power source or ground through a through-hole connected to the gold with four cores, it becomes possible to supply the ground or power.

FIG. 6 shows a sectional view of an example of the use of a connector using a metal core wiring board having such a structure.

In this drawing, it is used to connect two printed wiring boards, a back panel 2 and a card 1. To connect the card 1 and the metal core wiring board, connect the metal pins 13 to each
Insert it into the corresponding through pole of the vil board and solder 17
This is done by fixing it with On the other hand, back panel 2
, there is a metal bottle 14 with a pointed tip and this metal bottle 1.
A pin 16 consisting of a rose 15 that biases the pin 16 is fixed,
The connection is made by pressing the through-hole portion 8 of the metal core wiring board integrated with the card 1 against the contact pin 16. In this case, since the through hole 8 forms four conical parts, the connection can be made reliably even if the pin 16 and the through hole 8 are slightly misaligned.

Since the metal core wiring board uses a metal plate as the core, it itself has mechanical strength and can be fixed to the card with screws, etc., without the need to use a reinforcing side. do not have.

In fact, since the metal core can be used in conjunction with a land or power supply, it can be supplied from the bank to the channel (1) The flow capacity is increased, and the pattern on the metal core wiring board is By controlling the characteristic impedance of , it is possible to improve the bonding between printed wiring boards.'
i+, of course the mismatched part is extremely reduced, and the signal ÷
Crosstalk between wires is reduced, and it is possible to minimize the 4"f (') sound that appears in the transmission at the connector part.

The metal core wiring board of the present invention has printed threads on ←)t! It can also be used to connect electronic components and printed circuit boards (1/3 boards) instead of interconnecting boards/boards.

Also, electronic components 21. If a heat-generating component such as an LSI is used, it can also be expected to function as a static release plate.

[Dawn effect]

As explained above, the present invention uses a bent metal core wiring board to connect printed wiring boards to each other and to connect printed wiring boards to electronic components, thereby eliminating side mismatching parts in signal transmission paths. This has the effect of reducing crosstalk between signals and minimizing noise on signal waveforms.

[Brief explanation of the drawing]

1 and 2 are a perspective view and a sectional view of a conventional connector, FIG. 3 is a perspective view of an embodiment of the metal core wiring board of the present invention, and FIG. 4 (A4-(DJ) and FIG. 5 (Al -(D'
Figures 2 and 6 are cross-sectional views showing examples of use of the metal core wiring board of the present invention. 7... Board 8... Through hole 9...
Pattern 10...Metal plate (core) 11...Epoxy resin, etc. 12...Through hole plating Applicant Nippon City, Ki Co., Ltd. No. IM No. 2 7'4 Fig. 3

Claims (1)

[Claims] A board with a metal plate as its core is bent, and null holes are provided on both sides of the bent part, and the through holes on one side of the board and the through holes on the other side are connected to the pattern of the outer layer or the metal of the inner layer. A metal core wiring board featuring a core connection.