IO Power Bus Mesh Structure for Timing Consistency
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Solution Overview
Problem
Existing IO power bus designs face challenges in accommodating new IO pad designs, particularly in maintaining timing consistency across different orientations of vertical and horizontal IO pads, leading to significant timing variations in microchip operations.
Innovation Solution
The implementation of a mesh-type IO power bus architecture within an IO pad ring, where all IO pads have identical layouts with metal layer interconnects extending orthogonally and connected via vias, ensuring consistent power delivery without rotation, thereby reducing timing variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional IO power bus designs are used with different orientations for vertical and horizontal IO pads, then power delivery can be achieved, but timing variations become significant across different IO pad orientations
Solution Approach 1:
The patent applies universality by using a single IO pad design and orientation for all IO pads in the ring, rather than having different orientations for vertical and horizontal pads. This universal design approach allows the same pad structure to be used throughout, eliminating timing variations caused by orientation differences while maintaining adaptability to new designs through the standardized interface
Solution Approach 2:
The patent implements local quality by making all IO pads identical in structure and orientation, where each pad location has the same characteristics. This uniform local quality across all pad positions ensures consistent timing behavior, as each pad experiences the same electrical characteristics and power delivery conditions regardless of its position in the ring
2Adaptability or versatility
If multiple IO pad designs with different orientations are used, then coverage of different signal requirements is achieved, but layout and characterization efforts increase significantly
Solution Approach 1:
The patent uses a universal IO pad design that can handle all signal requirements through a single standardized structure. This eliminates the need for multiple different pad designs, thereby reducing layout complexity and characterization efforts while maintaining the ability to transmit various signals through the uniform pad interface
Solution Approach 2:
The patent merges the functionality of multiple different IO pad designs into a single unified design. By combining the requirements for vertical and horizontal pads into one standardized structure, the patent reduces the overall complexity of layout and characterization while preserving all necessary signal transmission capabilities
Data Source
AI summary
A MOS device includes an IO pad ring. The MOS device includes a first IO pad located on a first side of the IO pad ring, and a second IO pad located on a second side of the IO pad ring. The first IO pad includes a metal x layer power interconnect extending in a first direction. The first metal x layer power interconnect is of a metal x layer. The second side is 90° from the first side. The second IO pad includes a second metal x layer power interconnect extending in the first direction. The second metal x layer power interconnect is of the metal x layer. The second IO pad may further include at least one of a metal x+1 layer power interconnect or a metal x−1 layer power interconnect that extends orthogonal to the second metal x layer power interconnect of the second IO pad.