Compensation Capacitor Layout for Logic Circuit Space
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Solution Overview
Problem
Semiconductor memory devices face challenges in efficiently utilizing space in logic circuit blocks due to the large area requirements of compensation capacitors, which are needed to stabilize power supply voltage but leave unused space when arranged in series.
Innovation Solution
A flexible structure for compensation capacitors is implemented, where pairs of capacitors are disposed in parallel across multiple rows, allowing for more efficient use of space by sharing intermediate lines and reducing the area needed for each capacitor pair, enabling them to be placed separately or together in small areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compensation capacitors are arranged in series in the peripheral circuit region, then the voltage across the capacitive unit can match the voltage difference between power supply voltages, but large areas of unused space are left in the logic circuit blocks
Solution Approach 1:
The compensation capacitor is divided into multiple capacitor units (first, second, third capacitor units) that can be independently configured. Each unit can be selectively connected to different power supply voltage lines, allowing the overall compensation function to be maintained while adapting to available space in the logic circuit block. This segmentation enables flexible layout arrangements that reduce unused space.
Solution Approach 2:
The patent transitions from a traditional series arrangement to a multi-dimensional configuration where capacitor units are distributed across different rows and columns in the logic circuit block. The capacitor units can be connected to various power supply voltage lines (VDD, VDDA, VDDC, VSS, VSSA, VSSC) in different spatial positions, utilizing the two-dimensional layout space more efficiently rather than confining all capacitors to a single series chain in one location.
2Adaptability or versatility
If traditional series arrangement of compensation capacitors is used, then voltage matching is achieved, but space utilization efficiency in logic circuit blocks is reduced
Solution Approach 1:
The compensation capacitor structure is made dynamic and configurable rather than fixed. The first, second, and third capacitor units can be selectively connected to different power supply voltage lines based on the specific voltage requirements and available space in the logic circuit block. This dynamic configurability allows the system to adapt to different layout scenarios while maintaining both voltage matching capability and high space utilization efficiency.
Solution Approach 2:
Different capacitor units are placed in different local regions of the logic circuit block, each potentially serving specific local power supply stabilization needs. The first capacitor unit may be positioned near one set of power supply lines, the second unit near another set, allowing each local region to have optimized compensation while the overall structure maintains voltage matching capability across the entire device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for a more compact layout of compensation capacitors, improving space utilization in logic circuit blocks and maintaining effective power supply stabilization, thus enhancing the performance and efficiency of semiconductor memory devices.
Implementation Method 1
compensation capacitors included in the device have been used to stabilize the power supply
Data Source
AI summary
Apparatuses and methods for arranging compensation capacitors are described. An example apparatus includes: a first conductive layer including a portion; a second conductive layer: a contact coupled to the portion of the first conductive layer; a third conductive layer between the first conductive layer and the second conductive layer, coupled to the contact; one or more capacitor elements wherein each capacitor element of the one or more capacitor elements includes one end coupled to the second conductive layer and another end coupled to the third conductive layer.