US5070258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated circuit having metal substrate used to provide electrical indication of operation mode of circuits
Assignee: Mazda Motor Corp
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Filing: 1990-09-06
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Granted: 1991-12-03
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Expires: 2010-09-06
Abstract
Abstract An integrated circuit disclosed in this application includes a circuit board in which a conductive layer having a desired pattern is formed on a metal substrate through an insulating layer, and a circuit element group mounted on the insulating layer and connected to the predetermined conductive layer. A judgment circuit for discriminating on the basis of a potential of the metal substrate which one of at least two different logic processing modes is set is formed on the insulating layer. The circuit element group includes a circuit element including a logic processing unit having at least two different logic processing contents. The circuit element selectively switches and executes a logic processing operation corresponding to the logic processing mode discriminated by the judgment circuit from the at least two different logic processing contents.
Inventors
- 👤 Tomoji Izumi
- 👤 Nagahisa Fujita
- 👤 Yuichi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:54
CPC Classifications
B; B60; B60R; B60R16/00; B60R16/02; B60R16/023; B60R16/0239; G; G01; G01R; G01R31/00; G01R31/28; G01R31/317; G01R31/31701; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K1/14; H05K1/144; H10; H10W; H10W72/00; H10W72/851; H10W72/874; H10W72/884
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
An integrated circuit which comprises: a circuit board in which a conductive layer having a desired pattern is formed on a metal substrate through an insulating layer; a circuit element mounted on said insulating layer, connected to the predetermined conductive layer, and comprising a logic processing unit having at least two different logic processing contents; and judgment means, formed on said insulating layer, for discriminating on the basis of a potential of said metal substrate which one of at least two different logic processing modes is set, wherein said circuit element selectively switches and executes a logic processing operation corresponding to the logic processing mode discriminated by said judgment means from the at least two different logic processing contents.
Claim 2
Dependent Claim
119 words
An integrated circuit which comprises: a circuit board in which a conductive layer having a desired pattern is formed on a metal substrate through an insulating layer; a circuit element mounted on said insulating layer, connected to the predetermined conductive layer, and comprising a logic processing unit having at least two different logic processing contents; and judgment means, formed on said insulating layer, for discriminating on the basis of a potential of said metal substrate which one of at least two different logic processing modes is set, wherein said circuit element selectively switches and executes a logic processing operation corresponding to the logic processing mode discriminated by said judgment means from the at least two different logic processing contents.
Claim 3
Dependent Claim
50 words
The integrated circuit according to claim 1, wherein said insulating layer has, in a portion thereof, an opening for exposing a surface of said metal substrate therefrom, and said judgment means detects a potential of said metal substrate from the exposed surface portion of said metal substrate through the opening.
Claim 4
Dependent Claim
67 words
The integrated circuit according to claim 2, wherein said conductive layer comprises an output line for electrically connecting an output terminal of said judgment means and an input terminal of said circuit element and outputting a judgment signal from said judgment means to said circuit element, an input line connected to an input terminal of said judgment means, and a ground line for defining a ground level.
Claim 5
Dependent Claim
30 words
The integrated circuit according to claim 3, which further comprises: a bonding wire for electrically connecting said input line and the surface of said metal substrate exposed from the opening.
Claim 6
Dependent Claim
33 words
The integrated circuit according to claim 3, which further comprises: a resistor element and a capacitor element, both of which connect said ground line and said input line in parallel with each other.
Claim 7
Dependent Claim
32 words
The integrated circuit according to claim 1, wherein said circuit element comprises a first logic processing content for executing normal logic processing, and a second logic processing content for executing diagnostic processing.
Claim 8
Dependent Claim
73 words
The integrated circuit according to claim 6, wherein when said judgment means detects that the potential of said metal substrate is low, said judgment means outputs a judgment signal to said circuit element to execute the first logic processing content, and when said judgment means detects that the potential of said metal substrate is high, said judgment means outputs the judgment signal to said circuit element to execute the second logic processing content.
Claim 9
Dependent Claim
76 words
The integrated circuit according to claim 6, wherein when said judgment means detects that the potential of said metal substrate is substantially zero, said judgment means outputs a judgment signal to said circuit element to execute the first logic processing content, and when said judgment means detects that the potential of said metal substrate is higher than zero, said judgment means outputs the judgment signal to said circuit element to execute the second logic processing content.
Claim 10
Dependent Claim
31 words
The integrated circuit according to claim 2, wherein said metal substrate changes a potential thereof upon application of a voltage from a surface opposite to the surface exposed to the opening.
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) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |