Fishbone Differential Capacitor Vertical Stacking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional semiconductor capacitors face challenges such as excessive area consumption, low capacitance density, and high fabrication costs as device sizes decrease, making them unsuitable for advanced integrated circuit applications.
Innovation Solution
A semiconductor device with a capacitor structure formed within an interconnect structure, comprising a first conductive component and two symmetrically configured second and third conductive components separated by dielectric material, which can be designed as interdigitated capacitors with shielding features to enhance capacitance and reduce area usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional MOM capacitor structure is used, then fabrication process is simple, but area consumption is excessive and capacitance density is low
Solution Approach 1:
The capacitor structure transitions from a planar two-dimensional layout to a three-dimensional vertical configuration by stacking multiple capacitor units in the vertical direction. This allows the capacitor to achieve higher capacitance density without increasing the lateral footprint on the chip, effectively resolving the contradiction between area consumption and capacitance density.
Solution Approach 2:
The capacitor is divided into multiple discrete capacitor units that are stacked vertically. Each unit consists of interdigitated conductive components separated by dielectric material. This segmentation allows the total capacitance to be distributed across multiple smaller units, achieving high capacitance density while maintaining fabrication simplicity through modular construction.
2Ease of manufacture
If traditional MOM capacitor structure is used, then fabrication process is simple, but capacitance density is low
Solution Approach 1:
By stacking capacitor units vertically in the third dimension, the total capacitance increases without requiring proportionally more material or larger lateral area. The vertical stacking multiplies the effective capacitance contribution of each unit, achieving high capacitance density while using the same fabrication processes.
Solution Approach 2:
Multiple capacitor units are nested vertically within a compact footprint, similar to nested dolls. Each capacitor unit is contained within the vertical stack, allowing the cumulative capacitance of all units to be achieved within a small lateral area, thereby increasing capacitance density without complicating the fabrication process.
3Productivity
If device sizes decrease, then functional density increases, but capacitor area consumption becomes excessive
Solution Approach 1:
The capacitor structure utilizes the vertical dimension to achieve high capacitance values without occupying excessive lateral area. By stacking multiple capacitor units vertically, the design maintains small device footprint while providing sufficient capacitance, thereby supporting high functional density in advanced integrated circuits.
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
The proposed solution effectively increases capacitance density while reducing area consumption and fabrication costs, enabling more efficient use of space in advanced integrated circuits.
Implementation Method 1
a first conductive component; a second conductive component and a third conductive component symmetrically configured on opposite sides of the first conductive component, wherein the first, second, and third conductive components are separated from each other by respective dielectric material
Data Source
AI summary
The present disclosure provides an integrated circuit. The integrated circuit includes a substrate having a surface that is defined by a first axis and a second axis perpendicular to the first axis; and a capacitor structure disposed on the substrate. The capacitor structure includes a first conductive component; a second conductive component and a third conductive component symmetrically configured on opposite sides of the first conductive component. The first, second and third conductive components are separated from each other by respective dielectric material.