Semiconductor I/O Cell Array Design for Power Supply and Area Optimization

The patent transitions from a single-stage array to a multiple-stage array configuration, utilizing vertical stacking of cell stages. Power and ground potential supply cells are strategically positioned in specific stages (first and last stages) while intermediate stages contain only I/O cells, achieving comprehensive power supply across all stages without requiring power cells in every stage. This dimensional expansion resolves the contradiction by maintaining reliable power supply while maximizing I/O cell quantity.

The patent implements a unified power supply architecture where power potential supply cells and ground potential supply cells in the first and last stages serve multiple intermediate stages simultaneously through interconnect layers. This multi-functional design allows a single power cell to support multiple stages, reducing the total number of power cells needed while ensuring reliable power and ground potential supply to all I/O cells across all stages.

The patent divides the multiple-stage cell array into distinct segments: first stage with power and ground cells, intermediate stages with only I/O cells, and last stage with power and ground cells. This segmentation creates a modular structure where each stage can be independently designed and connected through standardized interconnect layers, reducing overall system complexity while enabling high I/O cell density.

The patent introduces interconnect layers as intermediary structures between cell stages. These interconnect layers act as mediators that systematically route power and ground potentials from the first and last stages to all intermediate stages, simplifying the power distribution architecture and reducing the complexity of direct point-to-point connections that would otherwise be required.