US4831494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer capacitor
Assignee: International Business Machines Corp
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Filing: 1988-06-27
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Granted: 1989-05-16
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Expires: 2008-06-27
Abstract
Abstract Disclosed is a multilayer capacitor consisting of a plurality of laminae with each of the laminae including a conductive plate portion and a non-conductive sheet portion. The conductive plate portion has at least one tab projecting to at least one edge of the conductive plate portion with the maximum number of tabs per conductive plate portion being limited to avoid excessive lateral congestion. The laminae are divided into different groups with the laminae from each group having the same number and location of tabs and with the laminae from different groups differing by at least the location of the tabs. The laminae are interleaved so that: (a) a lamina from one group alternates with a lamina from a different group, (b) the conductive plate portion of each lamina is in contact with the non-conductive sheet portion of each adjacent lamina, (c) the tabs are at a common edge of each lamina so that the tabs of the interleaved laminae form rows of tabs, and (d) the tabs from adjacent laminae are not in registry with each other. The capacitor finally includes islands of metallurgy joining selected groups of tabs in each row such that each of the islands covers a portion of each row of tabs.
Inventors
- 👤 Allen J. Arnold
- 👤 Michael E. Bariether
- 👤 Shin-Wu Chiang
- 👤 Hormazdyar M. Dalal
- 👤 Robert A. Miller
- 👤 Frank A. Montegari
- 👤 James M. Oberschmidt
- 👤 David T. Shen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:34
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
200 words
A multilayer capacitor comprising: a plurality of laminae, each of said laminae comprising a conductive plate portion and a non-conductive sheet portion; said conductive plate portion having at least one tab projecting to at least one edge of the conductive plate portion; said laminae divided into different groups with the laminae from each group having the same number and location of tabs and with the laminae from different groups differing by at least the location of the tabs; the laminae interleaved so that: (a) a lamina from one group alternates with a lamina from a different group, (b) the conductive plate portion of each lamina is in contact with the non-conductive sheet portion of each adjacent lamina, (c) the tabs are at a common edge of each lamina so that the tabs of the interleaved laminae form rows of tabs, and (d) the tabs from adjacent laminae are not in registry with each other; and islands of metallurgy joining selected groups of tabs in each row such that each of the islands covers a portion of each row of tabs, each of the islands and selected groups of tabs is capable of being independently assigned to a predetermined power level.
Claim 2
Dependent Claim
200 words
A multilayer capacitor comprising: a plurality of laminae, each of said laminae comprising a conductive plate portion and a non-conductive sheet portion; said conductive plate portion having at least one tab projecting to at least one edge of the conductive plate portion; said laminae divided into different groups with the laminae from each group having the same number and location of tabs and with the laminae from different groups differing by at least the location of the tabs; the laminae interleaved so that: (a) a lamina from one group alternates with a lamina from a different group, (b) the conductive plate portion of each lamina is in contact with the non-conductive sheet portion of each adjacent lamina, (c) the tabs are at a common edge of each lamina so that the tabs of the interleaved laminae form rows of tabs, and (d) the tabs from adjacent laminae are not in registry with each other; and islands of metallurgy joining selected groups of tabs in each row such that each of the islands covers a portion of each row of tabs, each of the islands and selected groups of tabs is capable of being independently assigned to a predetermined power level.
Claim 3
Dependent Claim
22 words
The capacitor of claim 1 wherein the maximum number of tabs per conductive plate portion is limited to avoid excessive lateral congestion.
Claim 4
Dependent Claim
23 words
The capacitor of claim 1 wherein each of the islands of metallurgy covers only a portion of each and every row of tabs.
Claim 5
Dependent Claim
31 words
The capacitor of claim 1 wherein the total number of tabs for each lamina shall be 2 and the total number of tabs for any two adjacent laminae shall be 4.
Claim 6
Dependent Claim
35 words
The capacitor of claim 1 wherein the thickness of the non-conductive sheet portions between adjacent conductive plate portions is uniform except that between each of the islands, the non-conductive sheet portion is of increased thickness.
Claim 7
Dependent Claim
35 words
The capacitor of claim 1 wherein each of the conductive plate portions is divided into separate and distinct segments such that there are a plurality of conductive plate portion segments for each non-conductive sheet portion.
Claim 8
Dependent Claim
32 words
The capacitor of claim 6 wherein the conductive plate portion is divided into 2 equal segments with each of the segments having at least one tab projecting from a common edge thereof.
Claim 9
Dependent Claim
21 words
The capacitor of claim 1 further comprising additional metallurgy on each of the islands for terminating the capacitor to a substrate.
Claim 10
Dependent Claim
16 words
The capacitor of claim 8 wherein the additional metallurgy comprises ball limiting metallurgy and solder balls.
Claim 11
Dependent Claim
15 words
The capacitor of claim 9 wherein the ball limiting metallurgy comprises layers of chromium/copper/gold, respectively.
Claim 12
Dependent Claim
19 words
The capacitor of clam 8 wherein the additional metallurgy comprises a solder pad covering substantially each of the islands.
Claim 13
Dependent Claim
19 words
The capacitor of clam 8 wherein the additional metallurgy comprises a solder pad covering substantially each of the islands.
Claim 14
Dependent Claim
15 words
The capacitor of claim 11 wherein the islands of metallurgy comprise layers of chromium/copper/gold, respectively.
Claim 15
Dependent Claim
15 words
The capacitor of claim 1 wherein the islands of metallurgy comprise layers of chromium/copper/chromium, respectively.
Claim 16
Dependent Claim
15 words
The capacitor of claim 1 wherein the islands of metallurgy comprise a layer of chromium.
Claim 17
Dependent Claim
23 words
The capacitor of claim 1 further comprising at least one tab projecting to an opposite edge of each of the conductive plate portions.
Claim 18
Dependent Claim
16 words
The capacitor of claim 15 further comprising islands of metallurgy joining selected groups of opposed tabs.
Claim 19
Dependent Claim
50 words
The capacitor of claim 16 further comprising additional metallurgy on each of the islands wherein the additional metallurgy on one side of the capacitor is for terminating the capacitor to a substrate and the additional metallurgy on the opposed side of the capacitor is for in-place testing of the capacitor.
Claim 20
Dependent Claim
50 words
The capacitor of claim 1 further comprising at least one tab projecting to an opposite edge of each of the conductive plate portions such that each edge of the conductive plate portions having at least one tab represents a mirror image of the opposed edge of the conductive plate portions.
Claim 21
Dependent Claim
34 words
The capacitor of claim 18 further comprising islands of metallurgy joining selected groups of opposed tabs such that the islands of metallurgy on opposed sides of the capacitor join mirror-image selected groups of tabs.
Claim 22
Dependent Claim
15 words
The capacitor of claim 1 wherein the islands of metallurgy in adjacent rows are staggered.
Claim 23
Dependent Claim
12 words
The capacitor of claim 1 wherein the capacitor is a decoupling capacitor.
Claim 24
Dependent Claim
182 words
A multilayer capacitor comprising: a plurality of laminae, each of said laminae comprising a conductive plate portion and a non-conductive sheet portion; said conductive plate portion having a plurality of tabs projecting to at least one edge of the conductive plate portion; said laminae divided into only two different groups with the laminae from each group having the same number and location of tabs and with the laminae from different groups differing by at least the location of the tabs; the laminae interleaved so that: (a) a lamina from one group alternates with a lamina from a different group, (b) the conductive plate portion of each lamina is in contact with the non-conductive sheet portion of each adjacent lamina, (c) the tabs are at a common edge of each lamina so that the tabs of the interleaved laminae form rows of tabs, and (d) the tabs from adjacent laminae are not in registry with each other; and islands of metallurgy joining selected groups of tabs in each row such that each of the islands covers a portion of each row of tabs.
Claim 25
Dependent Claim
182 words
A multilayer capacitor comprising: a plurality of laminae, each of said laminae comprising a conductive plate portion and a non-conductive sheet portion; said conductive plate portion having a plurality of tabs projecting to at least one edge of the conductive plate portion; said laminae divided into only two different groups with the laminae from each group having the same number and location of tabs and with the laminae from different groups differing by at least the location of the tabs; the laminae interleaved so that: (a) a lamina from one group alternates with a lamina from a different group, (b) the conductive plate portion of each lamina is in contact with the non-conductive sheet portion of each adjacent lamina, (c) the tabs are at a common edge of each lamina so that the tabs of the interleaved laminae form rows of tabs, and (d) the tabs from adjacent laminae are not in registry with each other; and islands of metallurgy joining selected groups of tabs in each row such that each of the islands covers a portion of each row of tabs.
Claim 26
Dependent Claim
22 words
The capacitor of claim 22 wherein the maximum number of tabs per conductive plate portion is limited to avoid excessive lateral congestion.
Claim 27
Dependent Claim
23 words
The capacitor of claim 22 wherein each of the islands of metallurgy covers only a portion of each and every row of tabs.
Claim 28
Dependent Claim
31 words
The capacitor of claim 22 wherein the total number of tabs for each lamina shall be 2 and the total number of tabs for any two adjacent laminae shall be 4.
Claim 29
Dependent Claim
26 words
The capacitor of claim 22 wherein each of the islands and selected groups of tabs is capable of being independently assigned to a predetermined power level.
Claim 30
Dependent Claim
35 words
The capacitor of claim 22 wherein the thickness of the non-conductive sheet portions between adjacent conductive plate portions is uniform except that between each of the islands, the non-conductive sheet portion is of increased thickness.
Claim 31
Dependent Claim
35 words
The capacitor of claim 22 wherein each of the conductive plate portions is divided into separate and distinct segments such that there are a plurality of conductive plate portion segments for each non-conductive sheet portion.
Claim 32
Dependent Claim
32 words
The capacitor of claim 28 wherein the conductive plate portion is divided into 2 equal segments with each of the segments having at least one tab projecting from a common edge thereof.
Claim 33
Dependent Claim
21 words
The capacitor of claim 22 further comprising additional metallurgy on each of the islands for terminating the capacitor to a substrate.
Claim 34
Dependent Claim
16 words
The capacitor of claim 30 wherein the additional metallurgy comprises ball limiting metallurgy and solder balls.
Claim 35
Dependent Claim
15 words
The capacitor of claim 31 wherein the ball limiting metallurgy comprises layers of chromium//copper/gold, respectively.
Claim 36
Dependent Claim
19 words
The capacitor of claim 30 wherein the additional metallurgy comprises a solder pad covering substantially each of the islands.
Claim 37
Dependent Claim
15 words
The capacitor of claim 33 wherein the islands of metallurgy comprise layers of chromium/copper/gold, respectively.
Claim 38
Dependent Claim
15 words
The capacitor of claim 22 wherein the islands of metallurgy comprise layers of chromium/copper/chromium, respectively.
Claim 39
Dependent Claim
15 words
The capacitor of claim 22 wherein the islands of metallurgy comprise a layer of chromium.
Claim 40
Dependent Claim
23 words
The capacitor of claim 22 further comprising at least one tab projecting to an opposite edge of each of the conductive plate portions.
Claim 41
Dependent Claim
16 words
The capacitor of claim 37 further comprising islands of metallurgy joining selected groups of opposed tabs.
Claim 42
Dependent Claim
50 words
The capacitor of claim 38 further comprising additional metallurgy on each of the islands wherein the additional metallurgy on one side of the capacitor is for terminating the capacitor to a substrate and the additional metallurgy on the opposed side of the capacitor is for in-place testing of the capacitor.
Claim 43
Dependent Claim
49 words
The capacitor of claim further comprising at least one tab projecting to an opposite edge of each of the conductive plate portions such that each edge of the conductive plate portions having at least one tab represents a mirror image of the opposed edge of the conductive plate portions.
Claim 44
Dependent Claim
34 words
The capacitor of claim 40 further comprising islands of metallurgy joining selected groups of opposed tabs such that the islands of metallurgy on opposed sides of the: capacitor join mirror-image selected groups of tabs.
Claim 45
Dependent Claim
15 words
The capacitor of claim 22 wherein the islands of metallurgy in adjacent rows are staggered.
Claim 46
Dependent Claim
12 words
The capacitor of claim 22 wherein the capacitor is a decoupling capacitor.
Claim 47
Dependent Claim
249 words
An electronic component arrangement comprising: a ceramic substrate having pads for solder bonding to an electronic component; and a multilayer capacitor comprising: a plurality of laminae, each of said laminae comprising a conductive plate portion and a non-conductive sheet portion; said conductive plate portion having at least one tab projecting to at least one edge of the conductive plate portion; said laminae divided into different groups with the laminae from each group having the same number and location of tabs and with the laminae from different groups differing by at least the location of the tabs; the laminae interleaved so that: (a) a lamina from one group alternates with a lamina from a different group, (b) the conductive plate portion of each lamina is in contact with the non-conductive sheet portion of each adjacent lamina, (c) the tabs are at a common edge of each lamina so that the tabs of the interleaved laminae form rows of tabs, and (d) the tabs from adjacent laminae are not in registry with each other; and islands of metallurgy joining selected groups of tabs in each row such that each of the islands covers a portion of each row of tabs; and additional metallurgy on each of the islands for terminating the capacitor to a substrate wherein the additional metallurgy comprises a solder pad covering substantially each of the islands; wherein the capacitor is joined to the substrate by contacting the pads of the substrate with the solder pad of the capacitor.
Claim 48
Dependent Claim
249 words
An electronic component arrangement comprising: a ceramic substrate having pads for solder bonding to an electronic component; and a multilayer capacitor comprising: a plurality of laminae, each of said laminae comprising a conductive plate portion and a non-conductive sheet portion; said conductive plate portion having at least one tab projecting to at least one edge of the conductive plate portion; said laminae divided into different groups with the laminae from each group having the same number and location of tabs and with the laminae from different groups differing by at least the location of the tabs; the laminae interleaved so that: (a) a lamina from one group alternates with a lamina from a different group, (b) the conductive plate portion of each lamina is in contact with the non-conductive sheet portion of each adjacent lamina, (c) the tabs are at a common edge of each lamina so that the tabs of the interleaved laminae form rows of tabs, and (d) the tabs from adjacent laminae are not in registry with each other; and islands of metallurgy joining selected groups of tabs in each row such that each of the islands covers a portion of each row of tabs; and additional metallurgy on each of the islands for terminating the capacitor to a substrate wherein the additional metallurgy comprises a solder pad covering substantially each of the islands; wherein the capacitor is joined to the substrate by contacting the pads of the substrate with the solder pad of the capacitor.
Claim 49
Dependent Claim
24 words
The electronic component arrangement of claim 44 wherein the maximum number of tabs per conductive plate portion is limited to avoid excessive lateral congestion.
Claim 50
Dependent Claim
25 words
The electronic component arrangement of claim 44 wherein each of the islands of metallurgy covers only a portion of each and every row of tabs.
Claim 51
Dependent Claim
250 words
An electronic component arrangement comprising: a ceramic substrate having pads for solder bonding to an electronic component; and multilayer capacitor comprising: a plurality of laminae, each of said laminae comprising a conductive plate portion and a non-conductive sheet portion; said conductive plate portion having a plurality of tabs projecting to at least one edge of the conductive plate portion; said laminae divided into only two different groups with the laminae from each group having the same number and location of tabs and with the laminae from different groups differing by at least the location of the tabs; the laminae interleaved so that: (a) a lamina from one group alternates with a lamina from a different group, (b) the conductive plate portion of each lamina is in contact with the non-conductive sheet portion of each adjacent lamina, (c) the tabs are at a common edge of each lamina so that the tabs of the interleaved laminae form rows of tabs, and (d) the tab from adjacent laminae are not in registry with each other; and islands of metallurgy joining selected groups of tabs in each row such that each of the islands covers a portion of each row of tabs; and additional metallurgy on each of the islands for terminating the capacitor to a substrate wherein the additional metallurgy comprises a solder pad covering substantially each of the islands; wherein the capacitor is joined to the substrate by contacting the pads of the substrate with the solder pad of the capacitor.
Claim 52
Dependent Claim
250 words
An electronic component arrangement comprising: a ceramic substrate having pads for solder bonding to an electronic component; and multilayer capacitor comprising: a plurality of laminae, each of said laminae comprising a conductive plate portion and a non-conductive sheet portion; said conductive plate portion having a plurality of tabs projecting to at least one edge of the conductive plate portion; said laminae divided into only two different groups with the laminae from each group having the same number and location of tabs and with the laminae from different groups differing by at least the location of the tabs; the laminae interleaved so that: (a) a lamina from one group alternates with a lamina from a different group, (b) the conductive plate portion of each lamina is in contact with the non-conductive sheet portion of each adjacent lamina, (c) the tabs are at a common edge of each lamina so that the tabs of the interleaved laminae form rows of tabs, and (d) the tab from adjacent laminae are not in registry with each other; and islands of metallurgy joining selected groups of tabs in each row such that each of the islands covers a portion of each row of tabs; and additional metallurgy on each of the islands for terminating the capacitor to a substrate wherein the additional metallurgy comprises a solder pad covering substantially each of the islands; wherein the capacitor is joined to the substrate by contacting the pads of the substrate with the solder pad of the capacitor.
Claim 53
Dependent Claim
24 words
The electronic component arrangement of claim 47 wherein the maximum number of tabs per conductive plate portion is limited to avoid excessive lateral congestion.
Claim 54
Dependent Claim
25 words
The electronic component arrangement of claim 47 wherein each of the islands of metallurgy covers only a portion of each and every row of tabs.
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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) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |