US 5,495,387 AGranted

RC array

AssigneeMurata Manufacturing Co., Ltd.

InventorsHarufumi Mandai, Yoshikazu Chigodo, Kazuhiro Iida

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Abstract

A plurality of capacitor elements defined by first and second capacitor electrodes are formed in the interior of a laminated ceramic block, while a plurality of first terminal electrodes to be electrically connected to the first capacitor electrodes and a ground terminal electrode to be connected to the second capacitor electrodes in common are formed on one side surface of the block. A plurality of resistor films are formed on a major surface of the block, to be connected to the first terminal electrodes. A plurality of second terminal electrodes are formed on another side surface of the block, to be electrically connected to the resistor films. Another ground terminal electrode is formed on this side surface, to be connected to the second capacitor electrodes in common. Thus, an RC array being applicable to a high frequency filter array is integrated and miniaturized to cope with high density packaging, as well as to enable surface mounting.

Claims9

Dependent claims

An RC array comprising:

a laminated ceramic block formed of a plurality of ceramic sheets;
a plurality of capacitor elements each having at least one pair of first and second capacitor electrodes disposed opposite to each other in the interior of said block, each of said first capacitor electrodes being formed on at least one of said plurality of ceramic sheets and each of said second capacitor electrodes being formed on at least one of said plurality of ceramic sheets that does not have said first capacitor electrodes formed thereon;
a plurality of first terminal electrodes, each being formed on an outer surface of said block to be electrically connected to one of said first capacitor electrodes of said plurality of capacitor elements;
a plurality of resistor films, each being formed on an outer surface of said block and having a first end electrically connected to one of said plurality of first terminal electrodes;
a plurality of second terminal electrodes, each being formed on an outer surface of said block to be electrically connected to a second end of one of said plurality of resistor films;
a coupling conductor connecting said second capacitor electrodes of said plurality of capacitor elements in common;
and
a ground terminal electrode being formed on an outer surface of said block to be electrically connected to said coupling conductor;
wherein
said coupling conductor is formed on said at least one of said plurality of ceramic sheets on which said second capacitor electrodes are formed;
said plurality of capacitor elements, said plurality of first terminal electrodes, said plurality of second terminal electrodes and said plurality of resistor films are connected to form a plurality of separate and independently operable filter circuits, each of the filter circuits comprises an RC circuit including one of the plurality of resistor films and one of the plurality of capacitor elements, each of the plurality of filter circuits being connected by the coupling conductor to the ground terminal electrode to connect each of the filter circuits to a common ground.

8 more elements

An RC array comprising:

a laminated ceramic block formed of a plurality of ceramic sheets;
a plurality of capacitor elements each having at least one pair of first and second capacitor electrodes disposed opposite to each other in the interior of said block, each of said first capacitor electrodes being formed on at least one of said plurality of ceramic sheets and each of said second capacitor electrodes being formed on at least one of said plurality of ceramic sheets that does not have said first capacitor electrodes formed thereon;
a plurality of tap electrodes, each being formed on an outer surface of said block to be electrically connected to one of said first capacitor electrodes of one of said plurality of capacitor elements;
a plurality of first resistor films and a plurality of second resistor films, each being formed on an outer surface of said block and having a first end electrically connected to one of said plurality of tap electrodes;
a plurality of first terminal electrodes, each being formed on an outer surface of said block to be electrically connected to a second end of one of said plurality of first resistor films;
a plurality of second terminal electrodes, each being formed on an outer surface of said block to be electrically connected to a second end of one of said plurality of second resistor films;
a coupling conductor connecting said second capacitor electrodes of said plurality of capacitor elements in common;
and
a ground terminal electrode being formed on an outer surface of said block to be electrically connected to said coupling conductor;
wherein
said coupling conductor is formed on said at least one of said plurality of ceramic sheets on which said second capacitor electrodes are formed;
said plurality of capacitor elements, said plurality of tap electrodes, said plurality of first terminal electrodes, said plurality of second terminal electrodes and said plurality of first and second resistor films are connected to form a plurality of separate and independently operable filter circuits, each of the filter circuits comprises an RC circuit including one of the first resistor films, one of the second resistor films and one of the plurality of capacitor elements, each of the plurality of filter circuits being connected by the coupling conductor to the ground terminal electrode to connect each of the filter circuits to a common ground.

9 more elements

An RC array comprising:

a laminated ceramic block formed of a plurality of sheets;
a plurality of first capacitor elements each having at least one pair of first and second capacitor electrodes disposed opposite to each other in the interior of said block, each of said first capacitor electrodes being formed on at least one of said plurality of ceramic sheets and each of said second capacitor electrodes being formed on at least one of said plurality of sheets that does not have said first capacitor electrodes formed thereon;
a plurality of second capacitor elements each having at least one pair of third and fourth capacitor electrodes disposed opposite to each other in the interior of said block, each of said third capacitor electrodes being formed on at least one of said plurality of ceramic sheets and each of said fourth capacitor electrodes being formed on at least one of said plurality of sheets that does not have said third capacitor electrodes formed thereon;
a plurality of first tap electrodes, each being formed on an outer surface of said block to be electrically connected to one of said first capacitor electrodes of one of said plurality of first capacitor elements;
a plurality of first resistor films, each being formed on an outer surface of said block and having a first end electrically connected to one of said plurality of first tap electrodes;
a plurality of first terminal electrodes, each being formed on an outer surface of said block to be electrically connected to a second end of one of said plurality of first resistor films;
a plurality of second tap electrodes, each being formed on an outer surface of said block to be electrically connected to one of said third capacitor elements of one of said plurality of second capacitor elements;
a plurality of second resistor films, each being formed on an outer surface of said block and having a first end electrically connected to one of said plurality of second tap electrodes;
a plurality of second terminal electrodes each being formed on an outer surface of said block to be electrically connected to a second end of one of said plurality of second resistor films;
a coupling conductor connecting said second capacitor electrodes of said plurality of first capacitor elements and said fourth capacitor electrodes of said second capacitor elements in common;
and
a ground terminal electrode being formed on an outer surface of said block to be electrically connected to said coupling conductor;
wherein
said second terminal electrodes, said fourth terminal electrodes and said coupling conductor are formed on the same ceramic sheet;
said plurality of first and second capacitor elements, said plurality of first and second tap electrodes, said plurality of first and second terminal electrodes and said plurality of first and second resistor films are connected to form a plurality of separate and independently operable filter circuits, each of the filter circuits comprises an RC circuit including one of the first resistor films, one of the second resistor films, one of the first capacitor elements and one of the second capacitor elements, each of the plurality of filter circuits being connected by the coupling conductor to the ground terminal electrode to connect each of the filter circuits to a common ground.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/271,263Filed 6 Jul 1994 · continuation
Priority: JP 3-2002049 Aug 1991
Granted: 27 Feb 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H01G 4/38
Fixed capacitors; Processes of their manufacture: multiple capacitors, i.e. structural combinations of fixed capacitors
H03H 1/02
Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network:…
H03H 2001/0085
Constructional details: multilayer, e.g. LTCC, HTCC, green sheets
H01G
Capacitors