Bit Line Support Segments to Prevent Collapse at Reduced Dimensions
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Solution Overview
Problem
In the manufacturing process of semiconductor structures, as the critical dimension reduces, bit lines exhibit poor structural stability and are prone to collapsing.
Innovation Solution
A semiconductor structure is designed with a support layer comprising first and second support segments connected to the bit line, which is located between these segments, providing structural support and preventing collapse during manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the critical dimension of bit lines is reduced continuously, then the integration density is improved, but the structural stability of bit lines deteriorates and they become prone to collapsing
Solution Approach 1:
The support layer is divided into multiple discrete support segments positioned at different locations beneath the bit line. Each support segment provides localized structural reinforcement without requiring continuous material deposition, thus maintaining stability while accommodating reduced critical dimensions
Solution Approach 2:
A support layer is introduced as an intermediary structure between the substrate and the bit line. This intermediate layer provides mechanical support to the fragile bit line, preventing collapse during manufacturing processes while allowing the bit line to maintain its reduced critical dimension
2Stability of the object's composition
If a support layer with multiple support segments is added to enhance bit line stability, then the structural stability is improved, but the device complexity increases
Solution Approach 1:
Rather than adding a continuous support layer that would increase complexity, the support structure is segmented into discrete segments. Each segment is formed independently using standard photolithography and deposition processes, allowing the complexity to be managed through modular fabrication steps
Solution Approach 2:
The support segments serve multiple functions: they provide mechanical support to prevent bit line collapse, act as spacing elements to maintain critical dimensions, and can serve as etch stop layers during subsequent processing steps. This multi-functionality reduces the need for additional dedicated support structures
Data Source
AI summary
The present disclosure relates to the technical field of semiconductors, and provides a semiconductor structure and a manufacturing method thereof. The semiconductor structure includes: a substrate; a bit line located on the substrate; and a support layer located on the substrate, wherein the support layer includes a first support segment and a second support segment, the first support segment and the second support segment are both connected to the bit line, and the bit line is located between the first support segment and the second support segment.