Capacitive Element Monolithic Conductive Region Vertical Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Capacitive elements in integrated circuits occupy a significant surface area and require multiple manufacturing steps, limiting their size reduction and efficiency.
Innovation Solution
A capacitive element structure with a monolithic conductive region extending perpendicularly from the substrate surface, reducing the surface area occupied by the element while maximizing capacitive interfaces through a counter-implant layer and dielectric regions, eliminating the need for peripheral isolation structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional capacitive element structures are used with peripheral isolation structures, then the capacitive element can operate in accumulation mode and inversion mode, but the surface area occupied by the element is large
Solution Approach 1:
The patent transitions from a planar capacitive structure to a three-dimensional structure by extending the monolithic conductive region vertically into the substrate. This dimensional change increases the capacitive interface area without proportionally increasing the surface footprint, effectively resolving the contradiction between maintaining operational versatility and reducing surface area occupation.
Solution Approach 2:
The patent merges the capacitive element structure with the substrate by having the monolithic conductive region extend directly into the substrate without requiring separate peripheral isolation structures. This integration eliminates the need for additional isolation rings while maintaining the dual-mode operation capability, thereby reducing the occupied surface area.
2Reliability
If conventional capacitive element structures with peripheral isolation structures are used, then the capacitive element can be formed, but the manufacturing process requires multiple dedicated steps
Solution Approach 1:
The patent combines the formation of the capacitive element with the formation of the active region in a single integrated process. The monolithic conductive region is formed as part of the active region structure, eliminating the need for separate peripheral isolation structure formation steps and reducing overall manufacturing complexity while maintaining element reliability.
Solution Approach 2:
The patent extracts and eliminates the peripheral isolation structures from the conventional capacitive element design. By removing these unnecessary isolation rings, the manufacturing process is simplified without compromising the functional integrity or reliability of the capacitive element.
3Productivity
If the surface area of capacitive elements is reduced, then more elements can be integrated, but the capacitive performance may be compromised
Solution Approach 1:
The patent resolves this contradiction by extending the capacitive structure vertically into the substrate, creating additional capacitive interface area in the third dimension. This allows the capacitive performance to be maintained or enhanced while the surface footprint is reduced, enabling higher integration density without compromising reliability.
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 solution reduces the surface area required for capacitive elements while maintaining or enhancing capacitive performance, allowing for smaller integrated circuits with improved manufacturing efficiency.
Implementation Method 1
The capacitive element comprises a monolithic conductive region having one part covering a surface area of said front face and at least one part extending into the active region perpendicularly to said front face
Implementation Method 2
the active region is doped with a first type of conductivity and comprises, on the front face, a counter-implant layer doped with a second type of conductivity opposite the first type of conductivity
Data Source
AI summary
A capacitive element is located in an active region of the substrate and on a front face of the substrate. The capacitive element includes a first electrode and a second electrode. The first electrode is formed by a first conductive region and the active region. The second electrode is formed by a second conductive region and a monolithic conductive region having one part covering a surface of said front face and at least one part extending into the active region perpendicularly to said front face. The first conductive region is located between and is insulated from the monolithic conductive region and a second conductive region.