JPS60236290A - Printed 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 [Field of Industrial Application] The present invention relates to a printed wiring board on which electronic components can be mounted and which can have a large number of connector terminals for electrically connecting the components.

[Prior art and its problems]

Conventionally, the configuration of the connector terminal portion of a printed circuit board is as shown in FIG.
It has a configuration arranged in columns. However, in this configuration, the number of connector bins is limited by the length of one side of the board 1. In addition, if you try to increase the number of connector bins within the limited shape of the board l, the width of the terminal part 2, which is the contact part of each connector, will be narrow, and the position accuracy will deteriorate, causing contact failure. However, there was a drawback that the number of connector bins was limited.

[Purpose of the invention]

An object of the present invention is to provide a single-sided printed wiring board (first board) having a (first) conductive terminal part on one side near the (second) conductive terminal part of a conventional printed wiring board (second board). An object of the present invention is to provide a printed wiring board which eliminates the above-mentioned drawbacks by mounting a multi-layer structure as a whole and increasing the number of terminal parts.

[Structure of the invention]

To this end, the configuration of the present invention includes a single-sided printed wiring having a plurality of first conductive terminal parts for connector connection on one side and a first through hole connected to the first conductive terminal parts in a pattern. A second board of single-sided printed wiring or multilayer printed wiring, which has one board, a plurality of second conductive terminal parts for connector connection on one side or both sides, and a plurality of second through-holes connected thereto. Then, the first substrate is placed adjacent to the second conductive terminal portion of the second substrate with the first conductive terminal portion on the front side, and the corresponding second and first substrates are placed adjacent to the second conductive terminal portion of the second substrate. It is characterized in that the through holes are electrically connected and mounted.

[Embodiments of the invention]

Next, one embodiment will be described with reference to the drawings.

FIG. 2 is an exploded perspective view of an embodiment of the printed wiring board according to the present invention, FIGS. 3 and 4 are a plan view and a vertical cross-sectional view of the board, respectively, and FIG. 5 is an enlarged vertical cross-sectional view thereof. .

In the figure, reference numeral 11 denotes a second printed wiring board, which has a plurality of second conductive terminal parts I2 on both sides by plating the ends, and a plurality of through holes 13 , 14 , and 15 , each having a predetermined through hole 13 . , 14 and 15 are connected to other circuits by a pattern 16. Further, as shown in FIG. 5, a vial 17 is implanted in each through hole 15 and soldered with solder 18, so that the upper part of the pin 1 protrudes upward.

Reference numeral 19 denotes a first printed wiring board, which has a plurality of first conductive terminal portions 20 on the upper surface by plating the ends thereof, and through holes 21 shown in [a].

Next, the assembly will be explained. The first substrate 19 is placed on the upper surface of the second substrate 11 in the vicinity of the second terminal portion 12 with each through hole 21 fitting into each bottle 17 . Thereafter, the portion of each pin 17 that protrudes upward from the first substrate 19 is soldered to the through hole 21 using the solder 18.

Thereby, through holes 21 and 15 are electrically connected. Furthermore, interference with the solder 18 of the second substrate 11 is prevented by the function of the recess 21g formed at the bottom of the through hole 21 of the first substrate 19. Further, since the first substrate 19 is printed on one side, there is no risk of short-circuiting of the through hole 13°L4 of the second substrate 11.

Thus, since the plurality of first terminal portions 20 of the first substrate 19 are added to the plurality of second terminal portions 2 of the second substrate 11, the number of pins of the connector that contacts this can be calculated. can be increased. Furthermore, by carefully arranging the positions of the through holes, it is also possible to fix the first substrate 19 to both surfaces of the second substrate 11, respectively.

In the above embodiment, the second board 11 is of a double-sided printed type, but it may be of a single-sided glint type as shown in FIG. 6, in which the same parts as in FIG. 5 are given the same reference numerals.

In FIG. 6, the second substrate 11-1 has a second terminal portion (2) only on one side. The first substrate 19-1 is the second substrate 11
The pin 17 is soldered and fixed to a position corresponding to the second terminal part 12 on the side opposite to the second terminal part 12 of -1. According to this, even if the second board 11-1 is a single-sided printed type, by fixing the first board 19-1,
The connector connection portion can be made to the same extent as a double-sided printed wiring board.

〔Effect of the invention〕

As explained above, according to the printed wiring board of the present invention, a single-sided printed wiring board (second board) having a first conductive terminal part on one side near the second conductive terminal part of a conventional printed wiring board (second board) Since the printed wiring board (first board) is mounted, the number of terminals can be increased within a limited area. It has the advantage of being large.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional printed wiring board, and FIG. 2 is an exploded perspective view of an embodiment of the printed wiring board according to the present invention.
3 and 4 are a plan view and a vertical sectional view of the above substrate, respectively, FIG. 5 is an enlarged longitudinal sectional view thereof, and FIG. 6 is an enlarged longitudinal sectional view of another embodiment of the above substrate. 1... Printed wiring board 2... Terminal section 11.11
-1... Second printed wiring board 12... Second terminal portions 13, 14, J5, 21... Through hole 1
7... Bin 18... Solder 19, 19-1... First printed wiring board 20.
...First terminal applicant: NEC Corporation

Claims (1)

[Claims] a plurality of first conductive terminal portions for connector connection on one side and fc connected to the first conductive terminal portion in a pattern;
a first through-hole of the single-sided printed wiring;
, a plurality of second conductive terminal portions for connector connection on one or both sides, and a plurality of second conductive terminal portions connected to these.
a second board of single-sided printed wiring or multilayer printed wiring having through-holes, the first board is placed adjacent to the second conductive terminal portion of the second board; 1. A printed wiring board characterized in that a first conductive terminal portion is mounted with surface side pressure and the corresponding second and first through holes are electrically connected.