Offset Semiconductor Pads for High-Density Layout
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Solution Overview
Problem
The miniaturization of semiconductor devices limits the line width and space width of patterns due to the resolution constraints of photolithography, making it challenging to efficiently arrange pads and gate lines in a limited space.
Innovation Solution
The semiconductor device employs a specific arrangement of first and second pads with offset centers, coupled with corresponding gate lines, and a method involving the formation of mask patterns and etching processes to efficiently arrange pads and gate lines in a diagonal configuration, allowing for more efficient use of space and overcoming photolithography resolution limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If photolithography process is used to form patterns, then manufacturing process is simple, but pattern width and space width cannot be decreased below resolution limit
Solution Approach 1:
The pad arrangement is segmented into multiple groups (first pad group, second pad group, third pad group, fourth pad group) with different orientations. Each group contains pads arranged in specific directions (first direction, second direction, third direction, fourth direction respectively), allowing fine pattern formation in limited space without requiring excessive reduction of individual pattern dimensions.
Solution Approach 2:
The invention transitions from conventional single-direction or simple grid pad arrangements to a multi-dimensional diagonal arrangement. Pads are configured in diagonal directions with offset centers, utilizing spatial dimensions more efficiently to achieve higher integration without being constrained by photolithography resolution limits in any single direction.
2Quantity of substance
If pattern width and space width are decreased to increase number of patterns, then integration density increases, but photolithography resolution limit is reached
Solution Approach 1:
The pad array is divided into multiple groups with different orientations and spacing configurations. This segmentation allows each group to be optimized independently, increasing the total number of usable pads without requiring uniform reduction of all pattern dimensions below the photolithography resolution limit.
Solution Approach 2:
By arranging pads in diagonal directions and utilizing offset center configurations across multiple groups, the invention effectively increases the number of resolvable patterns by exploiting angular and spatial relationships rather than relying solely on reducing linear pattern dimensions.
3Area of stationary object
If pads and gate lines are arranged in limited space, then device integration increases, but layout efficiency decreases due to resolution constraints
Solution Approach 1:
The layout is segmented into distinct pad groups with specific orientation patterns. This segmentation enables more efficient routing of gate lines to pads by organizing them in systematic diagonal groups, improving layout efficiency within the constrained device area while maintaining manufacturability.
Solution Approach 2:
The diagonal arrangement of pad groups utilizes the available device area more effectively by distributing pads across multiple angular directions. This multi-dimensional spatial organization increases integration density while maintaining sufficient spacing and routing efficiency for manufacturing.
Data Source
AI summary
A semiconductor device includes first pads having centers offset in a first direction, wherein the first pads are arranged in a second direction crossing the first direction; second pads separated in the first direction from the first pads and arranged in the second direction, wherein centers of the second pads are offset in the first direction; first gate lines coupled to the first pads, respectively; and second gate lines coupled to the second pads, respectively.