US4853827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High dielectric multilayer capacitor
Assignee: Circuit Components Inc
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Filing: 1988-12-29
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Granted: 1989-08-01
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Expires: 2008-12-29
Abstract
Abstract A multilayer capacitor is presented which provides high capacitance and low inductance. The capacitor comprises a plurality of conductive layers, each separated from the other and sandwiching therebetween a high capacitance flexible dielectric sheet material. The dielectric sheet material is comprised of a monolayer of multilayer or single layer high dielectric (e.g. ceramic) chips or pellets of relatively small area and thickness which are arranged in a planar array. These high dielectric constant chips are spaced apart by a small distance. The spaces between the chips are then filled with a flexible polymer/adhesive to define a cohesive sheet with the polymer binding the array of high dielectric (e.g. ceramic) chips together. Next, the opposite planar surfaces of the array (including the polymer) are electroless plated or electroded by vacuum metal deposition, or sputtering, to define opposed metallized surfaces.
Inventors
- 👤 Jorge M. Hernandez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:38
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H05; H05K; H05K1/00; H05K1/16; H05K1/162; H05K1/02; H05K1/0296; H05K1/0298; H05K2201/00; H05K2201/01; H05K2201/0183; H05K2201/0187; H05K2201/09; H05K2201/09209; H05K2201/0929; H05K2201/09309; H05K3/00; H05K3/46; H05K3/4611
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
153 words
A multi-layer capacitor comprising: (1) a plurality of spaced, discrete dielectric sheets, each of said discrete dielectric sheets including; (a) an array of spaced high dielectric chips arranged in a single layer, each of said chips having side, top and bottom surfaces; (b) a flexible polymeric binder between said side surfaces of said chips and binding said chips to define a cohesive sheet having opposed first and second planar surfaces with said top and bottom surfaces of said chips being exposed on said respective first and second surfaces; (c) a first metallized layer o said first planar surface; and (d) a second metallized layer on said second planar surface; (2) at least a pair of electrically isolated conductive electrodes, each of said electrodes being electrically connected to respective first and second metallized layers on said plurality of discrete dielectric sheets; and (3) electrically insulative material between said spaced plurality of discrete dielectric sheets.
Claim 2
Dependent Claim
153 words
A multi-layer capacitor comprising: (1) a plurality of spaced, discrete dielectric sheets, each of said discrete dielectric sheets including; (a) an array of spaced high dielectric chips arranged in a single layer, each of said chips having side, top and bottom surfaces; (b) a flexible polymeric binder between said side surfaces of said chips and binding said chips to define a cohesive sheet having opposed first and second planar surfaces with said top and bottom surfaces of said chips being exposed on said respective first and second surfaces; (c) a first metallized layer o said first planar surface; and (d) a second metallized layer on said second planar surface; (2) at least a pair of electrically isolated conductive electrodes, each of said electrodes being electrically connected to respective first and second metallized layers on said plurality of discrete dielectric sheets; and (3) electrically insulative material between said spaced plurality of discrete dielectric sheets.
Claim 3
Dependent Claim
13 words
The capacitor of claim 1 wherein: said chips comprise a sintered ceramic material.
Claim 4
Dependent Claim
25 words
The capacitor of claim 2 wherein: said ceramic material is selected from the group consisting of barium titanate, lead magnesium niobate or iron tungsten niobate.
Claim 5
Dependent Claim
23 words
The capacitor of claim 1 wherein: said chips have a shape which is selected from the group consisting of cylindrical, rectangular or square.
Claim 6
Dependent Claim
22 words
The capacitor of claim 1 including: at least one groove formed in said chips to enhance mechanical binding with said polymeric binder.
Claim 7
Dependent Claim
29 words
The capacitor of claim 1 wherein: said chips comprise multilayer capacitive elements having exposed top and bottom electrodes which electrically contact respective of said first and second metallized layers.
Claim 8
Dependent Claim
27 words
The capacitor of claim 1 wherein: said first and second metallized layers are comprised of a material selected from the group consisting of copper, nickel or tin.
Claim 9
Dependent Claim
18 words
The capacitor of claim 1 wherein: said polymeric binder is comprised of a flexible thermoplastic or flexibilized thermoset.
Claim 10
Dependent Claim
18 words
The capacitor of claim 1 wherein: said high dielectric chip has a dielectric constant of at least 10,000.
Claim 11
Dependent Claim
27 words
The capacitor of claim 1 including: electrically conductive adhesive means bonding said conductive electrodes to said respective first and second metallized layers on said discrete dielectric sheets.
Claim 12
Dependent Claim
27 words
The capacitor of claim 1 including: electrically conductive solder means bonding said conductive electrodes to said respective first and second metallized layers on said discrete dielectric sheets.
Claim 13
Dependent Claim
12 words
The capacitor of claim 1 including: tab means on said conductive electrodes.
Claim 14
Dependent Claim
19 words
The capacitor of claim 12 wherein: said tab means extend from at least two opposing sides of said capacitor.
Claim 15
Dependent Claim
27 words
The capacitor of claim 1 wherein: each of said conductive electrodes include a plurality of extensions for electrically connecting to said respective first and second metallized layers.
Claim 16
Dependent Claim
15 words
The capacitor of claim 14 wherein: said extension extend substantially perpendicular to said conductive electrodes.
Claim 17
Dependent Claim
17 words
The capacitor of claim 1 wherein: each of said electrodes is substantially transverse from an adjacent electrode.
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |