Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Reexamination Certificate
2001-05-16
2002-10-22
Lam, Cathy (Department: 1775)
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
C174S261000, C439S059000, C439S061000, C439S062000, C439S067000, C439S078000, C439S083000, C439S289000, C361S749000, C361S765000, C361S776000
Reexamination Certificate
active
06469255
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a composite wiring board in which at least two rigid wiring boards are joined and a manufacturing method thereof.
2. Description of the Related Art
Conventionally, a composite wiring board in which at least two rigid wiring boards are disposed substantially in parallel to each other and are joined to each other for attaining to be small in size and excellent in function has been used.
FIG. 1A
is a side view showing a first example of the conventional composite wiring board.
The composite wiring board
10
has a structure that connectors
13
,
14
are respectively mounted on two rigid wiring boards
11
,
12
and a lead wire or a flexible wiring board
15
are inserted into each of the connectors
13
,
14
to join each of the rigid wiring board
11
,
12
.
Because the connectors
13
,
14
need to have a height and an area to a certain extent owing to the necessity of a pitch of a connector pin or other necessities, the composite wiring board
10
having the aforesaid structure has a fault that it is not suitable for high density mounting.
FIG. 1B
is a side view showing a second example of the conventional composite wiring board.
The composite wiring board
20
has a structure that counterparts
23
,
24
of a board-to-board connector capable of being divided into the two counterparts
23
,
24
are mounted on two rigid wiring boards
21
,
22
, respectively, and that the counterparts
23
,
24
of the board-to-board connector are fit to each other and thereby each of the rigid wiring boards
21
,
22
is joined to each other.
The composite wiring board
20
having such a structure does not need any lead wires and thereby does not require any troubles of the connection of the two rigid wiring boards
21
,
22
. However, because the composite wiring board
20
has the structure formed by the simple pressing to each other of the counter parts
23
,
24
of the board-to-board connector for joining them, the composite wiring board
20
has a disadvantage that the counterparts
23
,
24
of the board-to-board connector are easy to come off owing to vibrations and other forces at the time of the usage thereof.
FIG. 1C
is a side view showing a third example of the conventional composite wiring board.
The composite wiring board
30
has a structure that a lead wire or a flexible wiring board
33
is directly soldered on two rigid wiring boards
31
,
32
for joining each of the rigid wiring boards
31
,
32
.
The composite wiring board
30
having such a structure becomes less expensive in costs because it does not have the aforesaid connectors
13
,
14
,
23
and
24
, but it has a disadvantage that it is not suitable for high density mounting because It has a necessity of widening the pitches of the circuit patterns on the rigid wiring boards
31
,
32
for preventing the bridging of solder.
FIG. 1D
is a side view showing a fourth example of the conventional composite wiring board.
The composite wiring board
40
is a flex rigid wiring board that has a structure using two rigid wiring boards
41
.
42
that put a flexible wiring board
43
at the center part of each of them.
Because the flexible wiring board
43
is put in each of the rigid wiring boards
41
,
42
in the composite wiring board
40
having such a structure, the joining of each of the rigid wiring boards
41
,
42
is strong. Moreover, because the decrease of the mounting area is not produced like in each of the aforesaid composite wiring boards
10
,
20
and
30
, the composite wiring board
40
is suitable for high-density mounting.
Because it is needed for the aforesaid fourth example of the conventional composite wiring board
40
to put and fix the flexible wiring board
43
having flexibility between the rigid wiring boards
41
,
42
, a specific adhesive is needed, and the gluing processes thereof are complicated, and further the coefficient of utilization of the material is also decreases. Consequently, the composite wiring board
40
has a disadvantage that it becomes very expensive. Moreover, because the composite wiring board
40
has a necessity to bend the flexible wiring board
43
between the rigid wiring boards
41
and
42
, the composite wiring board
40
has another disadvantage that it needs a space for the bending.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to solve the aforementioned problems and to provide a composite wiring board that occupies a small space and is low in price and a manufacturing method thereof.
According to the present invention, the foregoing and other objects and advantages are attained by a composite wiring board comprising at least two rigid wiring boards on an end face of each of which a connection portion is formed, wherein each of the rigid wiring boards is arranged so that each of the connection portions is situated on a plane and each of the corresponding connection portions is connected with each other in the plane.
Because the connection portions are formed on the end faces of the rigid wiring boards according to the aforesaid structure of the invention, the plural rigid wiring boards can be Joined by the connection of each of the corresponding connection portions at the side face of each of the rigid wiring boards. Consequently, existing connection means can be applied to the connection of each of the connection portions, and thereby the composite wiring board can be manufactured inexpensively in cost. Moreover, because the connection means can be arranged in one plane, it is possible to attain the decrease of the space of the composite wiring board.
As described above, according to the invention, a composite wiring board that is inexpensive and occupies a small space can be provided.
REFERENCES:
patent: 3362005 (1968-01-01), Corns
patent: 4113981 (1978-09-01), Fujita et al.
patent: 5005105 (1991-04-01), Onodera
patent: 5346401 (1994-09-01), Delianides et al.
patent: 5428190 (1995-06-01), Stopperan
patent: 5737053 (1998-04-01), Yomogihara et al.
patent: 6040529 (2000-03-01), Takeshita et al.
patent: 6195261 (2001-02-01), Babutzka et al.
patent: 6274225 (2001-08-01), Miyake et al.
Kosemura Mayumi
Takebe Toru
Watanabe Yoshio
Kananen, Esq. Ronald P.
Lam Cathy
Rader Fishman & Grauer PLLC.
Sony Corporation
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