Patent US4575744A successfully refreshed from Google Patents.
US4575744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interconnection of elements on integrated circuit substrate
Assignee: International Business Machines Corp
•
Filing: 1983-09-16
•
Granted: 1986-03-11
•
Expires: 2003-09-16
Abstract
Abstract Concentric patterns of cells or macros (1) and conductive lines 13 conserve space on a substrate having two conductive levels. Macros (1) occupy only the first metal level and lines 13 are on the second metal level. The second metal level may also contain concentric patterns of power buses 20 and ground buses 20.
Inventors
- 👤 Luther B. Caldwell
- 👤 Michael F. Crocetti
- 👤 Bradford Dunham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/40; H10W20/41; H10W20/43; Y; Y10; Y10S; Y10S257/00; Y10S257/923
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
69 words
A solid state integrated circuit having circuit elements in adjoining cells and first and second spaced levels of conductive lines formed on said integrated circuit for interconnecting said cells, and said cells being primarily interconnected by generally concentric conductive lines on said second level which have at least one turn and by generally straight conductive lines on said first level connected to said conductive lines on said second level.
Claim 2
Dependent Claim
69 words
A solid state integrated circuit having circuit elements in adjoining cells and first and second spaced levels of conductive lines formed on said integrated circuit for interconnecting said cells, and said cells being primarily interconnected by generally concentric conductive lines on said second level which have at least one turn and by generally straight conductive lines on said first level connected to said conductive lines on said second level.
Claim 3
Dependent Claim
16 words
The integrated circuit as in claim 1 in which said adjoining cells are macro circuit elements.
Claim 4
Dependent Claim
24 words
The integrated circuit as in claim 1 in which said adjoining cells form two substantially straight columns joined at a substantially right angle bend.
Claim 5
Dependent Claim
26 words
The integrated circuit as in claim 2 in which said adjoining macro circuit element form two substantially straight columns joined at a substantially right angle bend.
Claim 6
Dependent Claim
35 words
The integrated circuit as in claim 3 comprising four groups of said columns, each group defining one of four equal parts of a rectangle, with said bends located substantially on the diagonals of said rectangle.
Claim 7
Dependent Claim
35 words
The integrated circuit as in claim 4 comprising four groups of said columns, each group defining one of four equal parts of a rectangle, with said bends located substantially on the diagonals of said rectangle.
Claim 8
Dependent Claim
49 words
The integrated circuit as in claim 1 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 9
Dependent Claim
49 words
The integrated circuit as in claim 2 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 10
Dependent Claim
49 words
The integrated circuit as in claim 3 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 11
Dependent Claim
49 words
The integrated circuit as in claim 4 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 12
Dependent Claim
55 words
The integrated circuit as in claim 5 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses each surrounding a central point and being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 13
Dependent Claim
57 words
The integrated circuit as in claim 6 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses each surrounding a central point and being generally concentric with themselves and with said conductive lines on said second level interconnecting said macro circuit elements.
Claim 14
Dependent Claim
92 words
A solid state integrated circuit having circuit elements in adjoining cells forming a plurality of substantially continuous lines, first and second spaced levels of conductive lines formed on said integrated circuit for interconnecting said cells, said lines of cells forming substantially straight columns joined at a bend with said straight columns being substantially parallel, said cells being interconnected by generally concentric conductive lines on said second level which have at least one turn and by generally straight conductive lines on said first level connected to said conductive lines on said second level.
Claim 15
Dependent Claim
92 words
A solid state integrated circuit having circuit elements in adjoining cells forming a plurality of substantially continuous lines, first and second spaced levels of conductive lines formed on said integrated circuit for interconnecting said cells, said lines of cells forming substantially straight columns joined at a bend with said straight columns being substantially parallel, said cells being interconnected by generally concentric conductive lines on said second level which have at least one turn and by generally straight conductive lines on said first level connected to said conductive lines on said second level.
Claim 16
Dependent Claim
17 words
The integrated circuit as in claim 13 in which adjoining cells are macros of substantially different sizes.
Claim 17
Dependent Claim
25 words
The integrated circuit as in claim 13 in which said adjoining cells form two substantially straight columns and said bend is substantially a right angle.
Claim 18
Dependent Claim
25 words
The integrated circuit as in claim 14 in which said adjoining cells form two substantially straight columns and said bend is substantially a right angle.
Claim 19
Dependent Claim
45 words
The integrated circuit as in claim 15 comprising four groups of said lines of adjoining cells having substantially parallel lines, each group defining one of four equal parts of a rectangle, with said bends of each group located substantially on the diagonals of said rectangle.
Claim 20
Dependent Claim
45 words
The integrated circuit as in claim 16 comprising four groups of said lines of adjoining macros having substantially parallel, columns, each group defining one of four equal parts of a rectangle, with said bends of each group located substantially on the diagonals of said rectangle.
Claim 21
Dependent Claim
49 words
The integrated circuit as in claim 13 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 22
Dependent Claim
49 words
The integrated circuit as in claim 14 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 23
Dependent Claim
49 words
The integrated circuit as in claim 15 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 24
Dependent Claim
49 words
The integrated circuit as in claim 16 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 25
Dependent Claim
55 words
The integrated circuit as in claim 17 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses each surrounding a central point and being generally concentric with themselves and with said conductive lines on said second level interconnecting said cells.
Claim 26
Dependent Claim
48 words
The integrated circuit as in claim 18 in which said second level also comprises a plurality of power buses and a plurality of ground buses, said power buses and said ground buses being generally concentric with themselves and with said conductive lines on second level interconnecting said macros.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |