Dielectric Bonding via Roughened Nonconductive Adhesion Layer
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Solution Overview
Problem
The existing adhesion methods between conductive and nonconductive layers in semiconductor devices face challenges such as delamination, which degrades electrical performance and reliability, especially at high frequencies due to skin effect and dielectric loss, and roughening conductive surfaces to enhance adhesion increases resistivity.
Innovation Solution
The use of an intermediary nonconductive adhesion layer with surface roughening techniques to improve adhesion between conductive and dielectric layers, reducing delamination and maintaining smooth conductive surfaces for better electrical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the surface of a conductive layer is roughened to enhance adhesion to a nonconductive layer, then adhesion strength is improved, but electrical resistivity increases
Solution Approach 1:
The patent divides the adhesion function into two separate layers: a nonconductive adhesion layer directly on the conductive layer, and a roughened surface layer on the nonconductive layer for dielectric bonding. This segmentation allows the conductive layer to remain smooth for electrical performance while the outer surface provides mechanical interlocking for adhesion.
Solution Approach 2:
The patent introduces a nonconductive adhesion layer as an intermediary between the conductive layer and the dielectric layer. This intermediate layer serves as a mediator that provides both electrical isolation and a roughened surface for mechanical interlocking, eliminating the need to roughen the conductive layer itself.
2Reliability
If an intermediary nonconductive adhesion layer is introduced to maintain smooth conductive surfaces, then electrical performance is improved, but adhesion strength between layers may be reduced
Solution Approach 1:
The patent applies preliminary surface roughening treatment to the nonconductive adhesion layer before dielectric deposition. This preliminary action creates a roughened surface that provides mechanical interlocking for strong adhesion, while the underlying conductive layer remains smooth for optimal electrical performance.
3Strength
If surface roughening is applied to the nonconductive adhesion layer to improve dielectric adhesion, then adhesion between dielectric and nonconductive layer is improved, but device complexity increases
Solution Approach 1:
The patent combines the surface roughening step with the existing dielectric deposition process flow. The roughening treatment is integrated into the manufacturing sequence as a preparatory step before dielectric lamination, merging multiple functions into a coordinated process that achieves strong adhesion without requiring separate complex manufacturing lines.
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 enhances electrical isolation and reduces signal losses, improving the reliability and performance of semiconductor devices by maintaining smooth conductive surfaces while ensuring strong adhesion between layers.
Implementation Method 1
surface roughening techniques to improve adhesion between conductive and dielectric layers
Implementation Method 2
adhesion between conductive layers and nonconductive layers can impact electrical performance and device reliability, especially at high frequencies due to skin effect
Data Source
AI summary
Methods, apparatus, systems, and articles of manufacture are disclosed that adhere a dielectric to a nonconductive layer in circuit devices. An example apparatus includes an electrically conductive layer, a dielectric layer, and an electrically nonconductive layer separating the dielectric layer from the conductive layer, the nonconductive layer having a first surface facing the conductive layer and a second surface facing the dielectric layer, the first surface having a first roughness, the second surface having a second roughness greater than the first roughness.