Electricity: conductors and insulators – Conduits – cables or conductors – Insulated
Reexamination Certificate
2000-06-27
2002-02-05
Dinkins, Anthony (Department: 2831)
Electricity: conductors and insulators
Conduits, cables or conductors
Insulated
C174S036000
Reexamination Certificate
active
06344616
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a cable suitable for use in connecting integrated circuit elements (LSIs) to each other and a method of producing the same.
In recent years, in electronic apparatuses such as a large scale computer, high-density mounting of circuit components is progressing following the increase in density of integrated circuits. In the electronic apparatuses of the type, integrated circuit elements are connected by a cable to each other.
Referring to
FIG. 1
, description will be made about a structure of connecting two integrated circuit elements to each other by the use of a conventional cable. The cable depicted by
91
comprises a cable body
92
and a connector arrangement
93
and is interposed between two circuit boards
94
and
95
. The cable body
92
comprises a belt-like flexible substrate. The connector arrangement
93
comprises two connectors
93
a
and
93
b
attached to longitudinal opposite ends of the cable body
92
, respectively.
The connectors
93
a
and
93
b
are releasably attached to connectors
94
a
and
95
a
mounted on the circuit boards
94
and
95
, respectively. The connectors
94
a
and
95
a
are connected to integrated circuit elements
94
b
and
95
b
mounted on the circuit boards
94
and
95
, respectively. In order to connect the integrated circuit elements
94
b
and
95
b
to each other, the connectors
94
a
and
95
a
mounted on the circuit boards
94
and
95
are fitted to the connectors
93
a
and
93
b
of the cable
91
, respectively. As a result, the integrated circuit elements
94
b
and
95
b
are connected to each other through the cable
91
, the connectors
94
a
and
95
a
and the circuit boards
94
and
95
.
However, the cable
91
connects the two integrated circuit elements
94
b
and
95
b
not directly but through the circuit boards
94
and
95
and the connectors
94
a
and
95
b
. Thus, an increased number of parts are required for connection of the integrated circuit elements
94
and
95
. In addition, a wide space is required for connection of the integrated circuit elements
94
and
95
. This results in a problem that the conventional cable can not cope with the high-density mounting of the electronic apparatuses in recent years.
Japanese Unexamined Patent Publication (JP-A) No. S62-291876 discloses another conventional cable. However, an increased number of parts are also required for connection of a well-known pin grid array package. Therefore, the above-mentioned problem is not solved.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a cable and a cable assembly for connecting integrated circuit elements to each other, which is capable of reducing a space required for connection of the integrated circuit elements so as to cope with the recent development of high-density mounting in electronic apparatuses.
It is another object of the present invention to provide a method of producing the above-mentioned cable for connecting integrated circuit elements to each other.
Other objects of the present invention will become clear as the description proceeds.
According to an aspect of the present invention, there is provided a cable for use in connection between integrated circuit elements each having terminals. The cable comprises a cable body comprising an insulator and a plurality of conductors buried in the insulator to have a matrix pattern in section. The cable body has longitudinal end faces as mounting surfaces which are for mounting the integrated circuit elements, respectively. The cable further comprises a plurality of conductor pads formed on each of the mounting surfaces and connected to the conductors for being connected to the terminals of each of the integrated circuit elements, respectively.
According to another aspect of the present invention, there is provided a cable assembly which comprises a plurality of cables as mentioned above and a mounting part for mounting one of the integrated circuit elements. The mounting part is placed between the cables and connected to the conductor pads.
According to still another aspect of the present invention, there is provided a method of producing a cable for use in connection between integrated circuit elements each having terminals. The method comprises the steps of preparing a base member and forming a layered body on the base member. The layered body includes an insulator and a plurality of conductors buried in the insulator to have a matrix pattern in section. The method further comprises the steps of removing the base member from the layered body to form a cable blank, cutting longitudinal opposite end portions of the cable blank to form a cable body having longitudinal end faces as mounting surfaces, and forming a plurality of conductor pads on each of the mounting surfaces to be connected to the conductors.
REFERENCES:
patent: 3579206 (1971-05-01), Grange
patent: 3818122 (1974-06-01), Luetzow
patent: 3878341 (1975-04-01), Balde
patent: 4812135 (1989-03-01), Smith
patent: 4845311 (1989-07-01), Scrieiber et al.
patent: 4992059 (1991-02-01), King et al.
patent: 5025555 (1991-06-01), Mase
patent: 5042971 (1991-08-01), Ambrose
patent: 5262590 (1993-11-01), Lia
patent: 5552565 (1996-09-01), Cartier et al.
patent: 5691509 (1997-11-01), Balzano
patent: 6093894 (2000-07-01), Carlson et al.
patent: 62-291876 (1987-12-01), None
Dinkins Anthony
Mayo III William H.
Whitham Curtis & Christofferson, P.C.
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