Patent US6429533B1 successfully refreshed from Google Patents.

US6429533B1 Expired / Lapsed US ⏱️ 0.0 years remaining

Conductive polymer device and method of manufacturing same

Assignee: Bourns Inc

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Filing: 1999-11-23

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Granted: 2002-08-06

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Expires: 2019-11-23

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Abstract

Abstract An electronic device includes a first conductive polymer layer sandwiched between a first external metal foil electrode and a first internal metal foil electrode, a second conductive polymer layer sandwiched between a second internal metal foil electrode and a second external metal foil electrode, a layer of fiber-reinforced epoxy resin bonding the first and second internal electrodes together, a first terminal providing electrical contact between the first internal electrode and the second external electrode, and a second terminal providing electrical contact between the second internal electrode and the first external electrode. In a preferred embodiment, the polymer layers exhibit PTC behavior, and the terminals are formed by a solder layer applied over a plated layer of conductive metal. Insulative layers are preferably provided on the external electrodes, and located so as to insulate the first and second terminals from each other. Thus configured, the first and second polymer layers are connected in parallel between the first and second terminals by the first and second internal electrodes and the first and second external electrodes.

Inventors

👤 Wen Been Li
👤 Kun Ming Yang

Bibliographic Details

Application Number —

Jurisdiction US

Data Source google_patents

Last Synchronized 2026-11-09 11:10

CPC Classifications

H; H01; H01C; H01C7/00; H01C7/02; H01C1/00; H01C1/14; H01C1/1406; H01C7/021

Claims Analysis

Total Claims: 8

Claim 1

Independent Claim 92 words

An electronic device having first and second opposed end surfaces, the device comprising: a first conductive polymer layer sandwiched between a first external electrode and a first internal electrode; a second conductive polymer layer sandwiched between a second internal electrode and a second external electrode; a layer of fiber-reinforced epoxy resin bonding the first and second internal electrodes together; a first terminal providing electrical contact between the first internal electrode and the second external electrode; and a second terminal providing electrical contact between the second internal electrode and the first external electrode.

Claim 2

Dependent Claim 92 words

Claim 3

Dependent Claim 16 words

The electronic device of claim 1 , wherein the electrodes are made of a metal foil.

Claim 4

Dependent Claim 26 words

The electronic device of claim 2 , wherein the metal foil is made of a material selected from the group consisting of nickel and nickel-coated copper.

Claim 5

Dependent Claim 25 words

The electronic device of claim 1 , wherein the first, second, and third conductive polymer layers are made of a material that exhibits PTC behavior.

Claim 6

Dependent Claim 27 words

The electronic device of claim 1 , wherein the first and second terminals are formed by a solder layer applied over a plated layer of conductive metal.

Claim 7

Dependent Claim 46 words

The electronic device of any of claims 1 , 2 , 3 , 4 , or 5 , further comprising an insulative layer on each of the first and second external electrodes and located so as to insulate the first and second terminals from each other.

Claim 8

Dependent Claim 50 words

The electronic device of any of claims 1 , 2 , 3 , 4 , or 5 , wherein the first and second conductive polymer layers are connected in parallel between the first and second terminals by the first and second internal electrodes and the first and second external electrodes.

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USPTO Annuity & Maintenance Windows

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2005-08-05	2006-02-04	2006-08-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2009-08-05	2010-02-04	2010-08-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2013-08-05	2014-02-04	2014-08-06	$7700.00	Window Closed / Lapsed

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