Grid-Based IC Layout for Reduced Buffer Space and Chip Size
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Solution Overview
Problem
Integrated circuit manufacturing processes are complicated by the need for buffer spaces between blocks, cells, and IPs of varying sizes, limiting the reduction of chip size.
Innovation Solution
The design of integrated circuits based on a grid configuration with specific pitches for grid lines and metal lines, allowing devices, cells, and blocks to be arranged and routed efficiently, reducing unnecessary space and chip size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If buffer spaces are required between blocks, cells, devices and IPs of varying sizes, then manufacturing processes become more difficult, but chip size cannot be reduced
Solution Approach 1:
The chip is divided into a standardized grid of minimum units, with each grid cell representing a discrete placement location for blocks, cells, or devices. This segmentation into uniform grid units simplifies the manufacturing process by providing a regular pattern for fabrication, while simultaneously reducing chip size by eliminating excessive buffer spaces between components.
Solution Approach 2:
The patent changes the design parameter from variable-sized placements with irregular buffer spaces to a fixed grid pitch parameter. By establishing a minimum pitch (e.g., 100nm, 200nm) as the standardized grid unit, the design achieves manufacturing simplicity through parameter uniformity, while the optimized pitch value minimizes the overall chip area.
2Adaptability or versatility
If blocks, cells, or devices have different sizes depending on functions, then functional requirements are met, but buffer space requirements increase and complicate manufacturing
Solution Approach 1:
The patent resolves layout complexity by transitioning from two-dimensional variable-sized placements to a one-dimensional grid system where all components are positioned at standardized intervals. The grid lines extending in both directions provide a reference framework that simplifies positioning, while components can still vary in size within their assigned grid cells, maintaining functional diversity without increasing layout complexity.
3Area of stationary object
If grid configuration with standardized pitch is used, then chip size is reduced and manufacturing is simplified, but design flexibility for varying component sizes is constrained
Solution Approach 1:
The standardized grid configuration serves multiple functions simultaneously: it provides a placement framework for diverse components, defines routing paths for interconnections, establishes alignment references for manufacturing, and determines spacing for buffer regions. This universal grid system accommodates various component sizes and functions without requiring separate design systems, thus maintaining design flexibility while reducing chip size.
Data Source
AI summary
An integrated circuit includes devices arranged in a grid configuration and a first metal layer on the devices, wherein the grid includes first grid lines arranged in a first direction based on a first pitch and extending in a second direction, and second grid lines arranged in the second direction based on a second pitch and extending in the first direction. At least one of the plurality of devices includes gate lines extending in the second direction and having the first pitch, and the first metal layer includes first metal lines extending in the first direction and having the second pitch.