CN-113204931-B - Method and system for generating circuit layout

Abstract

A method of generating a circuit layout includes generating a circuit design based on design information for an integrated circuit, the circuit design including an initial power supply network for the integrated circuit, performing a pre-layout simulation on the circuit design to determine whether the circuit design meets a predetermined specification, the circuit design including the initial power supply network, and generating a power supply network layout for the integrated circuit when the circuit design meets the predetermined specification, and generating the circuit layout for the integrated circuit after the power supply network layout is generated.

Inventors

• YANG ZHONGJIE
• CHEN TAIYI
• CHEN YUNRU
• PENG YONGZHOU

Assignees

• 台湾积体电路制造股份有限公司

Dates

Publication Date

20260508

Application Date

20200918

Priority Date

20200528

Claims (20)

1. 1. A method of generating a circuit layout, comprising the steps of: generating a circuit design based on design information for an integrated circuit, the circuit design including an initial power supply network for the integrated circuit; Performing a pre-layout simulation on the circuit design to determine whether the circuit design meets a predetermined specification, the circuit design including the initial power supply network; when the circuit design meets the predetermined specification, Generating a power supply network layout of the integrated circuit Generating a circuit layout of the integrated circuit after generating the power supply network layout, and When the circuit design does not meet the predetermined specification, Modifying the initial power supply network into a modified power supply network according to a relation between a pillar density and a maximum pillar density of the initial power supply network.
2. 2. The method as recited in claim 1, further comprising: Providing the design information in the form of a process design kit to be accessed, Wherein the design information includes parameters associated with power rails and conductive posts in the initial power supply network.
3. 3. The method of claim 1, wherein performing the pre-layout simulation on the circuit design including the initial power supply network comprises: At least one of a voltage drop pre-check process or an electromigration pre-check process is performed on the initial power supply network.
4. 4. The method of claim 3, wherein performing the voltage drop pre-check process comprises: a calculation of a voltage drop across the power rails of the initial power supply network and the conductive posts coupled to the power rails is performed.
5. 5. The method of claim 3, wherein performing the electromigration pre-check process comprises: A calculation of an electrotransport current flowing through the power rails of the initial power supply network and the conductive posts coupled to the power rails is performed.
6. 6. The method as recited in claim 1, further comprising: At least one of a voltage drop pre-check process or an electromigration pre-check process is performed on the modified power supply network.
7. 7. The method of claim 6 wherein the step of modifying the initial power supply network comprises: When the pillar density of the initial power supply network is not the maximum pillar density, adding at least one additional conductive pillar in the initial power supply network.
8. 8. The method of claim 6 wherein the step of modifying the initial power supply network comprises: At least one additional power rail is added to the initial power supply network when the column density of the initial power supply network is the maximum column density.
9. 9. The method as recited in claim 1, further comprising: At least one component is fabricated in the integrated circuit based on the power supply network layout and the circuit layout of the integrated circuit.
10. 10. A method of generating a circuit layout, comprising the steps of: Performing at least one of a voltage drop pre-check process or an electromigration pre-check process on a circuit design including a power supply network; Generating a power supply network layout for a design layout of an integrated circuit when the circuit design meets a predetermined specification; generating a circuit layout of the design layout of the integrated circuit after generating the power supply network layout; performing a voltage drop and electromigration verification process on the design layout; generating a final design layout of the integrated circuit when voltage drop and electromigration requirements are met during the voltage drop and electromigration verification process, and When the circuit design does not meet the preset specification, the power supply network is modified into a modified power supply network according to a relation between a pillar density and a maximum pillar density of the power supply network.
11. 11. The method of claim 10, wherein performing the voltage drop pre-check process comprises: a calculation of a voltage drop across power rails of the power supply network and conductive posts coupled to the power rails is performed to determine whether the circuit design meets the predetermined specification.
12. 12. The method of claim 11, wherein performing the voltage drop pre-check process further comprises: When the circuit design does not meet the predetermined specification and the pillar density of the power supply network is not the maximum pillar density, The pillar density of the power supply network is increased by adding at least one additional conductive pillar in the power supply network.
13. 13. The method of claim 11, wherein performing the voltage drop pre-check process further comprises: when the circuit design does not meet the predetermined specification and the pillar density of the power supply network is the maximum pillar density, The power supply network is modified by adding at least one additional power rail in the power supply network.
14. 14. The method of claim 10, wherein performing the electromigration pre-check process comprises: A calculation of an electrotransport current flowing through a plurality of power rails of the power supply network and a plurality of conductive posts coupled to the power rails is performed to determine whether the circuit design meets the predetermined specification.
15. 15. The method of claim 14, wherein performing the electromigration pre-check process further comprises: When the circuit design does not meet the predetermined specification and the pillar density of the power supply network is not the maximum pillar density, Increasing the density of the pillars of the power supply network.
16. 16. The method of claim 14, wherein performing the electromigration pre-check process further comprises: when the circuit design does not meet the predetermined specification and the pillar density of the power supply network is the maximum pillar density, The power supply network is modified by adding at least one additional power rail in the power supply network.
17. 17. The method of claim 15, wherein increasing the column density of the power supply network comprises: at least one additional conductive post is added to the power supply network, Wherein the power supply network includes conductive pillars each including a via coupled between a bottom layer and a top layer, and each of the at least one additional conductive pillars including a via coupled between the bottom layer and a conductive layer below the top layer.
18. 18. A system for generating a circuit layout, comprising: A memory for storing design information for an integrated circuit, the design information including parameters associated with a plurality of power rails and a plurality of conductive pillars coupled to the power rails, and At least one processor in communication with the memory and configured to perform operations comprising: generating a circuit design based on the design information, the circuit design including a power supply network for the integrated circuit; performing at least one of a voltage drop pre-check process or an electromigration pre-check process on the circuit design including the power supply network to determine whether the circuit design meets a predetermined specification; generating a power supply network layout and then generating a circuit layout for a design layout of the integrated circuit when the circuit design meets the predetermined specification; performing a voltage drop and electromigration verification process on the design layout; generating a final design layout of the integrated circuit when voltage drop and electromigration requirements are met during the voltage drop and electromigration verification process, and When the circuit design does not meet the preset specification, the power supply network is modified into a modified power supply network according to a relation between a pillar density and a maximum pillar density of the power supply network.
19. 19. The system of claim 18, wherein, in order to perform the voltage drop pre-check process, The at least one processor is configured to perform a calculation of a voltage drop across the power rails and the conductive posts coupled to the power rails of the power supply network.
20. 20. The system of claim 18, wherein to perform the electromigration pre-check process, The at least one processor is configured to perform a calculation of an electrotransport current flowing through the power rails and the conductive posts coupled to the power rails of the power supply network.

Description

Method and system for generating circuit layout Technical Field Embodiments of the present disclosure relate to a method, and more particularly, to a method and system for generating a circuit layout of an integrated circuit. Background An integrated circuit (INTEGRATED CIRCUIT; IC) typically includes semiconductor devices represented in an IC layout. The IC layout is generated from, for example, a circuit diagram of the IC. At various steps during the IC design process, from the IC design to the IC layout for the actual fabrication of the IC, various inspection and test processes are performed to ensure that the IC can be fabricated and will function as designed. Disclosure of Invention The embodiment of the disclosure relates to a method for generating a circuit layout, which is characterized by comprising the following steps. A circuit design is generated based on design information for the integrated circuit, the circuit design including an initial power supply network (PDN) for the integrated circuit. A pre-layout simulation is performed on the circuit design to determine whether the circuit design meets a predetermined specification, the circuit design including an initial power supply network. Generating a power supply network layout of the integrated circuit when the circuit design meets a predetermined specification, and generating a circuit layout of the integrated circuit after the power supply network layout is generated. When the circuit design does not meet the preset specification, the initial power supply network is modified into a modified power supply network according to the relation between the guide pillar density of the initial power supply network and the maximum guide pillar density. The embodiment of the disclosure relates to a method for generating a circuit layout, which is characterized by comprising the following steps. The method includes performing at least one of a voltage drop pre-inspection process or an electromigration pre-inspection process on a circuit design including a power supply network (PDN), generating a power supply network layout for a design layout of the integrated circuit when the circuit design meets a predetermined specification, generating a circuit layout for the design layout of the integrated circuit after the power supply network layout is generated, performing a voltage drop and electromigration verification process on the design layout, generating a final design layout of the integrated circuit when voltage drop and electromigration requirements are met during the voltage drop and electromigration verification process, and modifying the power supply network into a modified power supply network according to a relationship of a pillar density and a maximum pillar density of the power supply network when the circuit design does not meet the predetermined specification. The embodiment of the disclosure relates to a system for generating a circuit layout, comprising a memory to store design information for an integrated circuit, the design information comprising parameters associated with a plurality of power rails and a plurality of conductive pillars coupled to the power rails, and at least one processor in communication with the memory and to perform operations, the operations comprising generating a circuit design based on the design information, the circuit design comprising a power supply network (PDN) for the integrated circuit, performing at least one of a voltage drop pre-check process or an electromigration pre-check process on the circuit design comprising the power supply network to determine whether the circuit design meets a predetermined specification, generating a circuit layout of the power supply network layout and then generating a circuit layout for the design layout of the integrated circuit when the circuit design meets the predetermined specification, performing a voltage drop and electromigration verification process on the design layout, generating a final design layout of the integrated circuit when the voltage drop and electromigration requirements are met during the voltage drop and electromigration verification process, and modifying the power supply network according to a density of the pillars and a maximum power supply density of the power supply network when the circuit design does not meet the predetermined specification. An embodiment of the present disclosure is directed to a method of generating a circuit layout, comprising the steps of generating a circuit design based on design information for an integrated circuit, the circuit design including an initial power supply network (PDN) for the integrated circuit, performing a pre-layout simulation on the circuit design to determine whether the circuit design meets a predetermined specification, the circuit design including the initial power supply network, generating the circuit layout of the integrated circuit when the circuit design meets the predetermined specificati