US4791391A — Planar filter connector having thick film capacit…

Claim 1

Independent Claim 179 words

In an electrical filter connector having a conductive housing, a filter element enclosed within the housing and electrically conductive pins mounted in the filter element, the improvement whereby the filter element comprises an alumina substrate having opposed surfaces as well as through holes in which said pins are mounted and a planar array of closely spaced thick film capacitors formed by screen printing alternate conductive and dielectric layers on one of said surfaces, there being a capacitor associated with a respective pin, a first of said layers being a thick film metallization forming a ground electrode in electrical contact with the connector housing along two opposite edges, said ground elecrode extending to the periphery of said substrate and being continuous except for holes sufficient in size to allow the conductive pins to pass without touching the electrode, a third of said layers being a thick film metallization forming a discrete pin electrode in electrical contact with each of the pins but not with the housing, and a second of said layers being a thick film dielectric between the electrodes.

Claim 2

Dependent Claim 179 words

In an electrical filter connector having a conductive housing, a filter element enclosed within the housing and electrically conductive pins mounted in the filter element, the improvement whereby the filter element comprises an alumina substrate having opposed surfaces as well as through holes in which said pins are mounted and a planar array of closely spaced thick film capacitors formed by screen printing alternate conductive and dielectric layers on one of said surfaces, there being a capacitor associated with a respective pin, a first of said layers being a thick film metallization forming a ground electrode in electrical contact with the connector housing along two opposite edges, said ground elecrode extending to the periphery of said substrate and being continuous except for holes sufficient in size to allow the conductive pins to pass without touching the electrode, a third of said layers being a thick film metallization forming a discrete pin electrode in electrical contact with each of the pins but not with the housing, and a second of said layers being a thick film dielectric between the electrodes.

Claim 3

Dependent Claim 73 words

A filter connector according to claim 1 wherein the ground electrode layer is the first layer applied to the substrate, a secod layer being an insulating dielectric material applied over the ground electrode adjacent each substrate hole but spaced therefrom and a third layer being a thick film metallization forming a discrete pin electrode applied over the second layer around and into each substrate hole, said pins being solder mounted in said holes.

Claim 4

Dependent Claim 23 words

A filter connector according to claim 2 wherein a nonconducting encapsulant having a compatible coefficient of expansion is applied over the third layer.

Claim 5

Dependent Claim 22 words

A filter connector according to claim 3 wherein the first layer of the planar array of capacitors is a noble metal metallization.

Claim 6

Dependent Claim 22 words

A filter connector according to claim 3 wherein the first layer of the planar array of capacitors is a palladium/silver alloy metallization.

Claim 7

Dependent Claim 22 words

A filter connector according to claim 3 wherein the third layer of the planar array of capacitors is a noble metal metallization.

Claim 8

Dependent Claim 22 words

A filter connector according to claim 3 wherein the third layer of the planar array of capacitors is a palladium/silver alloy metallization.

Claim 9

Dependent Claim 21 words

A filter connector according to claim 3 wherein the first layer of the planar array of capacitors is a copper metallization.

Claim 10

Dependent Claim 21 words

A filter connector according to claim 3 wherein the third layer of the planar array of capacitors is a copper metallization.

Claim 11

Dependent Claim 19 words

A filter connector according to claim 2 wherein the third layer metallization is in the shape of an arrowhead.

Claim 12

Dependent Claim 15 words

A filter connector according to claim 1 wherein a ferrite sleeve encloses each conductive pin.

Claim 13

Dependent Claim 212 words

In an electrical filter connector having a conductive housing, a filter element enclosed within the housing and electrically conductive pins mounted on the filter element, the improvement whereby the filter element comprises a multiplicity of closely spaced thick film capacitors, each capacitor accommodating a respective single pin in a respective hole through an alumina substrate having opposed, parallel surfaces and each capacitor having alternate conductive and dielectric layers screen printed on the substrate, a first layer being a noble metal metallization forming an electrode grounded to the connector housing along two opposite edges and being continuous except for holes therein sufficient in size to allow the conductive pins to pass without touching the first layer, a second layer being a dielectric insulating material, the second layer substantially covering the first layer and overlapping the first layer around each hole, a third layer being a metallization forming a discrete pin electrode around and in each substrate hole and applied to overlap the second layer and being in electrical contact with each respective pin, and a fourth layer being a nonconducting encapsulant having a coefficient of expansion compatible with the other layers applied over the third layer, said first layer having an exposed border in electrical contact with the housing along two opposite edges.

Claim 14

Dependent Claim 212 words

In an electrical filter connector having a conductive housing, a filter element enclosed within the housing and electrically conductive pins mounted on the filter element, the improvement whereby the filter element comprises a multiplicity of closely spaced thick film capacitors, each capacitor accommodating a respective single pin in a respective hole through an alumina substrate having opposed, parallel surfaces and each capacitor having alternate conductive and dielectric layers screen printed on the substrate, a first layer being a noble metal metallization forming an electrode grounded to the connector housing along two opposite edges and being continuous except for holes therein sufficient in size to allow the conductive pins to pass without touching the first layer, a second layer being a dielectric insulating material, the second layer substantially covering the first layer and overlapping the first layer around each hole, a third layer being a metallization forming a discrete pin electrode around and in each substrate hole and applied to overlap the second layer and being in electrical contact with each respective pin, and a fourth layer being a nonconducting encapsulant having a coefficient of expansion compatible with the other layers applied over the third layer, said first layer having an exposed border in electrical contact with the housing along two opposite edges.

Claim 15

Dependent Claim 198 words

An electrical filter connector having a conductive housing, a filter element enclosed within the housing and electrically conductive pins mounted on the filter element, said filter element comprising a multiplicity of closely spaced thick film capacitors, each capacitor accommodating a respective single pin in a respective hole through an alumina substrate having opposed surfaces and each capacitor having alternate conductive and dielectric layers screen printed on one of said surfaces, a first layer being a noble metal metallization forming a discrete pin electrode applied over said one surface around and within each hole, the first layer being in electrical contact with the respective pin passing therethrough, a second layer being a dielectric insulating material overlapping the first layer, a third layer being a noble metal metallization forming a ground electrode overlapping the second layer, and a fourth layer being a nonconducting encapsulant having a coefficient of expansion compatible with the other layers applied over the third layer, said ground electrode extending to the periphery of said one surface, being continuous except for holes sufficient in size to allow the pins to pass without touching the electrode, and being en electrical contact with said housing along two opposite edges.

Claim 16

Dependent Claim 198 words

An electrical filter connector having a conductive housing, a filter element enclosed within the housing and electrically conductive pins mounted on the filter element, said filter element comprising a multiplicity of closely spaced thick film capacitors, each capacitor accommodating a respective single pin in a respective hole through an alumina substrate having opposed surfaces and each capacitor having alternate conductive and dielectric layers screen printed on one of said surfaces, a first layer being a noble metal metallization forming a discrete pin electrode applied over said one surface around and within each hole, the first layer being in electrical contact with the respective pin passing therethrough, a second layer being a dielectric insulating material overlapping the first layer, a third layer being a noble metal metallization forming a ground electrode overlapping the second layer, and a fourth layer being a nonconducting encapsulant having a coefficient of expansion compatible with the other layers applied over the third layer, said ground electrode extending to the periphery of said one surface, being continuous except for holes sufficient in size to allow the pins to pass without touching the electrode, and being en electrical contact with said housing along two opposite edges.

Claim 17

Dependent Claim 217 words

An electrical filter connector having a conductive housing, a filter element enclosed within the housing and electrically conductive pins mounted on the filter element, said filter element comprising a multiplicity of closely spaced thick film capacitors, each capacitor accommodating a respective single pin in a respective hole through an alumina substrate having opposed surfaces and each capacitor having alternate conductive and dielectric layers screen printed on one of said surfaces, a first layer being a metallization forming an electrode grounded to the connector housing along two opposite edges and being continuous except for openings around each hole in the substrate and also forming a portion of a pin electrode within each opening in the grounded electrode and said portion being in electrical contact with the pin but not with the grounded electrode; a second layer being a thick film dielectirc printed over a substantial portion of the grounded electrode and separating the grounded electrode from the pin electrodes; a third layer being a metallization forming the remainder of each discrete pin electrode and comprising a leg portion which extends over the dielectric layer into contact with the pin electrode portions in the first metallization layer; a fourth layer being a nonconducting encapsulant having a coefficient of expansion compatible with the other layers applied over the third layer.

Claim 18

Dependent Claim 217 words

An electrical filter connector having a conductive housing, a filter element enclosed within the housing and electrically conductive pins mounted on the filter element, said filter element comprising a multiplicity of closely spaced thick film capacitors, each capacitor accommodating a respective single pin in a respective hole through an alumina substrate having opposed surfaces and each capacitor having alternate conductive and dielectric layers screen printed on one of said surfaces, a first layer being a metallization forming an electrode grounded to the connector housing along two opposite edges and being continuous except for openings around each hole in the substrate and also forming a portion of a pin electrode within each opening in the grounded electrode and said portion being in electrical contact with the pin but not with the grounded electrode; a second layer being a thick film dielectirc printed over a substantial portion of the grounded electrode and separating the grounded electrode from the pin electrodes; a third layer being a metallization forming the remainder of each discrete pin electrode and comprising a leg portion which extends over the dielectric layer into contact with the pin electrode portions in the first metallization layer; a fourth layer being a nonconducting encapsulant having a coefficient of expansion compatible with the other layers applied over the third layer.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1991-12-13	1992-06-13	1992-12-13	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-12-13	1996-06-13	1996-12-13	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-12-13	2000-06-13	2000-12-13	$7700.00	Window Closed / Lapsed

Planar filter connector having thick film capacitors

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