EP0599469A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and device for designing layout of milliwave or microwave integrated circuit
Assignee: Mitsubishi Electric Corp
•
Filing: 1993-10-07
•
Granted: —
•
Expires: 2013-10-07
Abstract
Abstract A method of layout designing a milliwave or a microwave IC using a CAD system includes a step of displaying each of a plurality of kinds of concentrated constant circuit elements and distributed constant transmission lines of an IC chip to be designed on a CRT display (16) with a drawing object closed on the plane, which area and dimension represent electrical data, a step of connecting the drawing objects on the CRT display (16) by overlapping edges with each other and producing a virtual IC, a step of optimizing the layout of the virtual IC by changing the areas, dimensions, or arrangement of the respective drawing objects of the virtual IC so that the entire area of the virtual IC is as minimum as possible and the electrical characteristics of the virtual IC are desired ones, and a step of producing a mask pattern for IC production by logical operation between the drawing objects of the layout data of the virtual IC by utilizing the virtual IC which comprises collections of the drawing objects closed on the plane. Therefore, the data for optimizing layout of the IC comprises only the data required for electrical design of the integrated circuit to be designed, a memory required for executing a circuit simulation for optimizing the electrical characteristics is reduced, and the processing speed of the circuit simulation is reduced.
Inventors
- 👤 Noriyuki C/O Mitsubishi Denki K.K. Tanino
- 👤 Yashinobu C/O Mitsubishi Denki K.K. Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 16:06
CPC Classifications
G; G06; G06F; G06F30/00; G06F30/30; G06F30/39
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
177 words
A method of layout designing one of a milliwave and a microwave integrated circuits using a computer aided design system, comprising: a step of displaying each of a plurality of kinds of lumped circuit elements and distributed constant transmission lines for constituting an integrated circuit to be designed on a display as a drawing object closed on the two dimensional plane, the area and dimension of which represent electrical data; a step of connecting the drawing objects displayed on the display by overlapping edges thereof with each other, thereby to produce a virtual integrated circuit which comprises collections of the drawing objects closed on the two dimensional plane, and which virtual integrated circuit has the same circuit construction as that of the integrated circuit to be designed; and a step of performing a logical operation on the layout data of said virtual integrated circuit on the basis of the design rule defined in accordance with the production process for actually producing the integrated circuit to be designed, thereby to produce a mask pattern for integrated circuit production.
Claim 2
Independent Claim
220 words
A method of layout designing one of a milliwave and a microwave integrated circuits using a computer aided design system, comprising: a step of displaying each of a plurality of kinds of lumped circuit elements and distributed constant transmission lines for constituting an integrated circuit to be dsigned on a display as a drawing object closed on the two dimensional plane, the area and dimension of which represent electrical data; a step of connecting the drawing objects displayed on the display by overlapping edges thereof with each other, thereby to produce a virtual integrated circuit which comprises collections of the drawing objects closed on the two dimensional plane, and which virtual integrated circuit has the same circuit construction as that of the integrated circuit to be designed; a step of executing a circuit simulation of said virtual integrated circuit and, in accordance with the result of this circuit simulation, optimizing the areas and dimensions of each of the drawing objects representing the plural kinds of lumped circuit elements and distributed constant transmission lines so that said virtual integrated circuit has desired electrical characteristics; and a step of performing a logical operation on the layout data of said virtual integrated circuit, that are optimized as above for said areas and dimensions, thereby to produce a mask pattern for integrated circuit production.
Claim 3
Independent Claim
215 words
A method of layout designing one of a milliwave and a microwave integrated circuits using a computer aided design system, comprising: a step of displaying each of a plurality of kinds of lumped circuit elements and distributed constant transmission lines for constituting an integrated circuit to be designed on a display as a drawing object closed on the two dimensional plane, the area and dimension of which represent electrical data; a step of connecting the drawing objects displayed on the cathode ray tube display by overlapping edges thereof with each other, thereby to produce a virtual integrated circuit which comprises collections of the drawing objects closed on the two dimensional plane, and which virtual integrated circuit has the same circuit construction as that of the integrated circuit to be designed; a step of optimizing the arrangements of the respective drawing objects representing the plural kinds of lumped circuit elements and the configurations of the drawing objects of the distributed constant transmission lines so that the entire area of said virtual integrated circuit is as minimum as possible; and a step of performing a logical operation on the layout data of said virtual integrated circuit that are optimized as above for said arrangements and said configurations, thereby to form a mask pattern for integrated circuit production.
Claim 4
Independent Claim
268 words
A method of layout designing one of a milliwave and a microwave integrated circuits using a computer aided design system, comprising: a step of displaying each of a plurality of kinds of lumped circuit elements and distributed constant transmission lines for constituting an integrated circuit to be designed on a display as a drawing object closed on the two dimensional plane, the area and dimension of which represent electrical data; a step of connecting the drawing objects displayed on the display by overlapping edges thereof with each other, thereby to produce a virtual integrated circuit which comprises collections of the drawing objects closed on the two dimensional plane, and which virtual integrated circuit has the same circuit construction as that of the integrated circuit to be designed; a step of executing a circuit simulation of said virtual integrated circuit and, in accordance with the result of this circuit simulation, optimizing the areas and dimensions of the drawing objects representing the plural kinds of lumped circuit elements and distributed constant transmission lines so that said virtual integrated circuit has desired electrical characteristics; a step of optimizing the arrangements of the respective drawing objects representing the plural kinds of lumped circuit elements and the configurations of the drawing objects of the distributed constant transmission lines so that the entire area of said virtual integrated circuit is as minimum as possible; and a step of performing a logical operation on the layout data of said virtual integrated circuit that are optimized said areas and dimensions and said arrangements and said configurations, thereby to form a mask pattern for integrated circuit production.
Claim 5
Dependent Claim
63 words
The method of layout design of claim 1, further comprising, while displaying a drawing object representing a lumped circuit element on the display, displaying on the side part of the drawing object connection segments each comprising by a drawing object closed on the two dimensional plane, which connection segments representing connection margins between circuit elements to be provided in the actual production process.
Claim 6
Dependent Claim
63 words
The method of layout design of claim 2, further comprising, while displaying a drawing object representing a lumped circuit element on the display, displaying on the side part of the drawing object connection segments each comprising by a drawing object closed on the two dimensional plane, which connection segments representing connection margins between circuit elements to be provided in the actual production process.
Claim 7
Dependent Claim
63 words
The method of layout design of claim 3, further comprising, while displaying a drawing object representing a lumped circuit element on the display, displaying on the side part of the drawing object connection segments each comprising by a drawing object closed on the two dimensional plane, which connection segments representing connection margins between circuit elements to be provided in the actual production process.
Claim 8
Dependent Claim
63 words
The method of layout design of claim 4, further comprising, while displaying a drawing object representing a lumped circuit element on the display, displaying on the side part of the drawing object connection segments each comprising by a drawing object closed on the two dimensional plane, which connection segments representing connection margins between circuit elements to be provided in the actual production process.
Claim 9
Dependent Claim
136 words
The method of layout design of claim 3, wherein a step of optimizing the arrangements of the respective drawing objects representing the plural kinds of lumped circuit elements and the configurations of the drawing objects of the distributed constant transmission lines comprises repeating; a step of calculating the electro-magnetic coupling between the drawing objects constituting said virtual integrated circuit on the basis of the electro-magnetic analysis theory, and executing a circuit simulation using the calculated results of said electro-magnetic coupling; and a step of changing the arrangements of the respective drawing objects representing the plural kinds of lumped circuit elements and the configurations of the drawing objects of the distributed constant transmission lines so that said virtual integrated circuit has electrical characteristics closer to those of desired, in accordance with the result of this circuit simulation.
Claim 10
Dependent Claim
136 words
The method of layout design of claim 4, wherein a step of optimizing the arrangements of the respective drawing objects representing the plural kinds of lumped circuit elements and the configurations of the drawing objects of the distributed constant transmission lines comprises repeating; a step of calculating the electro-magnetic coupling between the drawing objects constituting said virtual integrated circuit on the basis of the electro-magnetic analysis theory, and executing a circuit simulation using the calculated results of said electro-magnetic coupling; and a step of changing the arrangements of the respective drawing objects representing the plural kinds of lumped circuit elements and the configurations of the drawing objects of the distributed constant transmission lines so that said virtual integrated circuit has electrical characteristics closer to those of desired, in accordance with the result of this circuit simulation.
Claim 11
Independent Claim
20 words
A method according to any one of the preceding claims in which the display is a cathode ray tube display.
Claim 12
Independent Claim
38 words
A method of designing the layout of an integrated circuit comprising lumped components using a computer aided design system including the step of optimizing the layout using only the data required for the electrical characteristics of the circuit.
Claim 13
Dependent Claim
14 words
A design system using a method according to any one of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.