Angled MIM Capacitor Layout for Complex Power Routing
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Solution Overview
Problem
Existing semiconductor memory devices face challenges in balancing capacitance arrangement and power enhancement due to complex power supply networks, leading to inefficient performance of MIM capacitors as capacitive elements.
Innovation Solution
The arrangement of MIM capacitors is optimized by using protruding parts on the top and bottom metals to couple with upper and lower wirings via vias, allowing for flexible power supply networks without interference, thereby enhancing capacitance and reducing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If MIM capacitors are arranged in complex power supply networks, then power enhancement is achieved, but capacitance arrangement efficiency deteriorates
Solution Approach 1:
The patent divides the capacitor structure into separate top metal and bottom metal portions with protruding parts, allowing independent optimization of capacitance arrangement and power supply connections. This segmentation enables the capacitor to function effectively within complex power networks without being constrained by their complexity.
Solution Approach 2:
The patent extends the capacitor structure into the vertical dimension by creating protruding parts that extend in a first direction, enabling three-dimensional integration. This allows the capacitor to maintain high capacitance density while accommodating complex power supply routing in horizontal planes.
2Ease of manufacture
If MIM capacitors use fixed metal areas, then manufacturing simplicity is maintained, but capacitance efficiency deteriorates
Solution Approach 1:
The patent introduces variable metal areas for the top and bottom metals, allowing the capacitor design to be dynamically adjusted based on specific performance requirements. The protruding parts can extend to different degrees, enabling optimization of capacitance efficiency without fundamentally changing the manufacturing process.
Solution Approach 2:
The patent changes the geometric parameters of the metal portions by introducing protruding parts with variable extension lengths and areas. This allows continuous adjustment of capacitance values and efficiency while maintaining compatibility with standard manufacturing processes.
3Reliability
If protruding parts are added to increase metal area, then capacitance efficiency improves, but device complexity increases
Solution Approach 1:
The patent merges the capacitor electrodes with the power supply network by having the protruding parts directly connect to upper and lower wirings. This integration eliminates the need for separate connection structures, reducing overall device complexity while maintaining enhanced capacitance efficiency.
Solution Approach 2:
The protruding parts serve multiple functions: they increase the effective metal area for higher capacitance, provide direct electrical connection to power supply wirings, and enable flexible routing options. This multi-functionality reduces the need for additional components and simplifies the overall structure.
Data Source
AI summary
Some embodiments of the disclosure provide an apparatus comprising: a plurality of upper wirings each extending in a first horizontal direction, a plurality of lower wirings each extending in a second horizontal direction perpendicular to the first horizontal direction; and a plurality of metal-insulator-metal (MIM) capacitors each extending at an intermediate angle between the first horizontal direction and the second horizontal direction.