US4278897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large scale semiconductor integrated circuit device
Assignee: Fujitsu Ltd
•
Filing: 1978-12-28
•
Granted: 1981-07-14
•
Expires: 1998-12-28
Abstract
Abstract A large scale semiconductor integrated circuit device comprising plural transistors and resistors formed in one semiconductor substrate, and many emitter-coupled circuits formed by connecting the transistors and resistors with a double metallic layer on the substrate surface. Moreover, between the groups and respective input/output terminals, large scale transistors are provided for outputting the emitter-follower circuits. These groups containing the emitter coupled circuits are connected to the input/output terminals by the double metallic wiring layer.
Inventors
- 👤 Kenichi Ohno
- 👤 Tohru Hosomizu
- 👤 Kazumasa Nawata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:53
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/90; H10D84/901; H10W; H10W20/00; H10W20/40; H10W20/41; H10W20/43
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
225 words
An LSI chip comprising: a semiconductor substrate having a planar surface; transistors and resistors formed with selected patterns in said surface; metallic layers on said surface comprising means for selectively connecting said transistors and resistors; input/output terminal pads disposed at the periphery of said LSI chip, said pads including terminal pads for supply and ground potentials for operating said LSI chip; large transistors connected as emitter-follower circuits for outputting signals from internal logic circuits of said LSI chip, said large transistors being located near said input/output terminal pads; macros arranged in an array on said surface, each said macro selectively comprising said transistors and resistors to form a respective unit logic circuit, each said unit logic circuit selectively handling high and low power, said macros comprising said unit logic circuits for handling high power being selectively terminated internally and externally of said LSI chip, said macros comprising said unit logic circuits for handling low power being terminated only within said LSI chip, said transistors and resistors of said macros comprising said unit logic circuit for handling high power having dimensions that are selectively larger than the corresponding dimensions of said transistors and resistors of said macros comprising said unit logic circuits for handling low power, said macros comprising said unit logic circuits for handling high power being located at the periphery of said macro array.
Claim 2
Dependent Claim
225 words
An LSI chip comprising: a semiconductor substrate having a planar surface; transistors and resistors formed with selected patterns in said surface; metallic layers on said surface comprising means for selectively connecting said transistors and resistors; input/output terminal pads disposed at the periphery of said LSI chip, said pads including terminal pads for supply and ground potentials for operating said LSI chip; large transistors connected as emitter-follower circuits for outputting signals from internal logic circuits of said LSI chip, said large transistors being located near said input/output terminal pads; macros arranged in an array on said surface, each said macro selectively comprising said transistors and resistors to form a respective unit logic circuit, each said unit logic circuit selectively handling high and low power, said macros comprising said unit logic circuits for handling high power being selectively terminated internally and externally of said LSI chip, said macros comprising said unit logic circuits for handling low power being terminated only within said LSI chip, said transistors and resistors of said macros comprising said unit logic circuit for handling high power having dimensions that are selectively larger than the corresponding dimensions of said transistors and resistors of said macros comprising said unit logic circuits for handling low power, said macros comprising said unit logic circuits for handling high power being located at the periphery of said macro array.
Claim 3
Dependent Claim
22 words
The LSI chip of claim 1 comprising said large transistors being located between said array of macros and said input/output terminal pads.
Claim 4
Dependent Claim
19 words
The LSI chip of claim 2 comprising wiring channels located between said input/output terminal pads and said large transistors.
Claim 5
Dependent Claim
31 words
The LSI chip of claim 1 or 2, selected ones of said unit logic circuits comprising current switches employing emitter coupled logic selectively formed from said transistors, resistors and metallic layers.
Claim 6
Dependent Claim
69 words
The LSI chip of claim 1, comprising at least a pair of selected ones of said resistors in selected ones of said macros being disposed for selective connection between a respective output of a respective one of said transistors of the same macro and a respective output of the macro, each said selected resistor having a different resistance value than the others of said selected resistors of said macro.
Claim 7
Dependent Claim
58 words
The LSI chip of claim 1, said metallic layers comprising a signal system for selectively connecting between said transistors and resistors within each of said macros, between different ones of said macros, and between said input/output pads and said macros, and said metallic layers also comprising systems for selectively distributing said supply and ground potentials to said macros.
Claim 8
Dependent Claim
15 words
The LSI chip of claim 6, said signal system comprising first and second wiring layers.
Claim 9
Dependent Claim
80 words
The LSI chip of claim 6, said macro array defining row and column directions, said supply potential distribution system comprising first wiring layers extending in a first one of said directions between adjacent macros of said array, second wiring layers extending between adjacent macros in the second of said directions and selectively connecting with said first wiring layers, and trunk wiring layers arranged at both ends of said first wiring layers and selectively connected to said supply potential terminal pads.
Claim 10
Dependent Claim
52 words
The LSI chip of claim 8, said ground potential distribution system comprising a portion of said second wiring layers and a trunk wiring layer located at both ends of said second wiring layer and selectively connected to said ground terminal pads, said second wiring layers being insulated from said first wiring layers.
Claim 11
Dependent Claim
25 words
The LSI chip of claim 6, said signal system selectively connecting said transistors and resistors in each of said macros comprising a first wiring layer.
References Cited (Backward Citations)
US3808475A
Cited
US3909636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |