Semiconductor Metal Option Structure Identification Pattern
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing semiconductor device metal option structure faces challenges during the mask repair process, where identifying nodes for changing metal options is difficult, leading to potential short or open failures and decreased repair efficiency.
Innovation Solution
A metal option structure with a unique identification pattern, comprising via patterns of different layouts, is introduced to guide the identification of nodes, facilitating accurate positioning and reducing failures during the mask repair process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mask repair process is used to change metal option, then product versatility is improved, but manufacturing precision deteriorates due to difficulty in identifying nodes
Solution Approach 1:
An identification pattern is introduced as an intermediary element between the metal layers. This pattern serves as a reference marker that mediates the positioning process during mask repair, enabling accurate node identification without directly being part of the functional circuit. The identification pattern includes specific geometric features that facilitate precise alignment and node location during the repair process.
Solution Approach 2:
The identification pattern is formed in advance during the standard fabrication process, before any mask repair operations are performed. This preliminary placement of reference markers ensures that when mask repair is needed later, the nodes can be quickly and accurately identified using the pre-established pattern, eliminating the need for complex real-time positioning during repair operations.
2Adaptability or versatility
If mask repair process is used to change metal option, then product versatility is improved, but repair efficiency deteriorates due to complex identification process
Solution Approach 1:
The identification pattern acts as a mediator that simplifies the repair process by providing clear visual or detection references. Instead of requiring complex analysis to identify nodes during mask repair, the pattern provides intuitive markers that guide the repair process, thereby improving efficiency while maintaining the ability to perform versatile metal option changes.
3Manufacturing precision
If identification pattern with different layout structure is introduced, then node positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The identification pattern is segmented into distinct, simple geometric features that are easy to fabricate and detect. By dividing the identification function into separate visual markers rather than a complex continuous structure, the pattern achieves high positioning accuracy while maintaining structural simplicity. Each segment of the pattern serves a specific identification purpose without requiring complex interconnections.
Solution Approach 2:
The identification pattern is placed only in specific local regions where node identification is needed, rather than throughout the entire device. This localized approach provides the necessary positioning accuracy at critical points while minimizing the overall structural complexity and material usage. The pattern's geometric features are optimized for their specific local identification function.
Data Source
AI summary
A metal option structure of a semiconductor device may include: a plurality of vias connecting first metal lines provided in a first metal layer to second metal lines provided in a second metal layer disposed over the first metal layer, and configured to constitute a plurality of nodes of an option circuit; and an identification pattern disposed between the first and second metal layers and having a different layout structure from the vias.