Semiconductor Interconnection Architecture with Varying Line Spacings
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Solution Overview
Problem
Manufacturing tolerances often hinder the reduction of integrated circuit footprint by causing alignment issues and unintended electrical connections between signal lines in semiconductor devices, particularly in the transition from inner to intermediate regions.
Innovation Solution
An interconnection architecture with varying line spacings and patterns in inner and intermediate regions, where intra-pair and inter-pair line-spacings are adjusted to prevent overlap and ensure proper alignment, featuring parallel signal lines with different spacings in the inner and intermediate regions, and a method involving substrate preparation, insulating layers, and sacrificial layers to pattern openings of varying widths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If line spacing is reduced to decrease footprint area, then area is improved, but manufacturing precision deteriorates due to alignment issues and unintended electrical connections
Solution Approach 1:
The patent applies different line spacing rules in different regions: in the inner region, a first line spacing is used, while in the intermediate region, a second line spacing (different from the first) is used. This local differentiation allows the circuit to achieve reduced footprint in the inner region while maintaining adequate spacing in the intermediate region to avoid manufacturing alignment issues and unintended connections.
Solution Approach 2:
The circuit layout is segmented into distinct regions (inner region and intermediate region) with different spacing characteristics. This segmentation allows each region to be optimized independently - the inner region can be densely packed to reduce overall footprint, while the intermediate region maintains larger spacing to ensure manufacturing reliability.
2Area of moving object
If footprint is reduced by using smaller functional components, then area is improved, but reliability deteriorates due to manufacturing tolerance violations
Solution Approach 1:
Different spacing strategies are applied locally in different regions. The inner region uses tighter spacing to minimize footprint, while the intermediate region uses wider spacing to ensure reliable electrical connections and avoid unintended interactions, thus maintaining overall system reliability despite the reduced footprint.
Solution Approach 2:
The intermediate region acts as a cushioning zone with increased line spacing that compensates for manufacturing tolerances. This预先设计的缓冲区域 prevents alignment errors from causing unintended electrical connections, thereby protecting the overall reliability of the compact circuit design.
Data Source
AI summary
An interconnection architecture, for a semiconductor device (having regions arranged to include at least an inner region, an intermediate region located at least aside the inner region, and an outer region located at least on a side of the intermediate region opposite to the inner region, includes: one or more pairs of first and second signal lines, each pair extending from the inner region into the intermediate region; first portions and second portions of the first and second signal lines being parallel, respectively, the first portions being located in the inner region; the first and second portion of at least the first signal line not being collinear; and an intra-pair line-spacing, d(i), for each pair including the following magnitudes, d2 in the inner region, and d2′ in the intermediate region, where d2<d2′.