Semiconductor Interconnect Insulation for Dense Layer Isolation
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Solution Overview
Problem
Conventional semiconductor device fabrication faces increased complexity and failure risks due to decreased distances between interconnected devices and layers, leading to challenges in preventing short circuits and cross-talk, particularly as functional density increases.
Innovation Solution
A removable insulation layer is introduced, formed by reacting a transforming medium with residual oxide on the semiconductor device, which is more insulating and easily removable than traditional layers, effectively preventing undesirable conductive communication between conductive elements while allowing desirable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional insulation layers are used to prevent short circuits between conductive elements, then insulation is provided, but the layers are difficult to remove and reduce fabrication efficiency
Solution Approach 1:
The patent changes the chemical composition and properties of the insulation layer by forming it through reaction of a transforming medium with residual oxide, creating a layer with different removal characteristics than conventional insulation layers, enabling easier removal while maintaining insulation effectiveness
Solution Approach 2:
The insulation layer is designed as a temporary structure that serves its insulation purpose during fabrication and then is easily removed, similar to a disposable component that fulfills its function and is discarded when no longer needed
2Productivity
If the distance between interconnected devices is decreased to increase functional density, then device density increases, but the risk of short circuits and cross-talk increases
Solution Approach 1:
The transforming medium acts as an intermediary that reacts with residual oxide to form an insulation layer, providing a reliable insulating barrier between closely spaced conductive elements, enabling high functional density while preventing short circuits
3Productivity
If the number of layers per chip area is increased to increase functional density, then device complexity increases, but the number of potential failure points increases
Solution Approach 1:
The insulation layer is formed in-situ by reacting the transforming medium with residual oxide already present on the substrate, eliminating the need for separate insulation layer deposition processes and reducing overall fabrication complexity while maintaining high functional density
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 removable insulation layer effectively reduces the risk of short circuits and cross-talk, enhancing the reliability of semiconductor devices by providing better insulation and being easier to remove than traditional layers, thus improving fabrication efficiency and reducing manufacturing defects.
Implementation Method 1
formed by reacting a transforming medium with residual oxide on the semiconductor device
Data Source
AI summary
A semiconductor device includes: a first conductive structure having sidewalls and a bottom surface, the first conductive structure extending through one or more isolation layers formed on a substrate; and an insulation layer disposed between at least one of the sidewalls of the first conductive structure and respective sidewalls of the one or more isolation layers, wherein the first conductive structure is electrically coupled to a second conductive structure through at least the bottom surface.