Bonding Interface Stabilization via Plasma and Rapid Thermal Annealing
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Solution Overview
Problem
Current methods for stabilizing the bonding interface between a thin semiconductor layer and a substrate, such as those using long-duration high-temperature stabilization annealing, result in defects, increased production costs, and degradation of the thin layer quality due to prolonged heat exposure.
Innovation Solution
A method involving the creation of an embrittlement area in the donor substrate, followed by rapid thermal annealing and optional plasma treatment to stabilize the bonding interface, allowing for shorter thermal treatment times and improved bonding without the need for extensive high-temperature annealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If long-duration high-temperature stabilization annealing is used to stabilize the bonding interface, then bonding interface stabilization is improved, but thin layer quality degrades and production costs increase
Solution Approach 1:
The patent applies preliminary plasma treatment to the substrate surface before bonding to enhance surface energy and promote stable bonding interface formation. This preliminary action reduces the need for subsequent long-duration high-temperature annealing, thereby preventing thin layer degradation while achieving bonding interface stabilization.
Solution Approach 2:
The patent modifies the bonding process parameters by using plasma treatment at lower temperatures and shorter durations compared to conventional high-temperature annealing. This parameter change achieves bonding interface stabilization without exposing the thin layer to prolonged high-temperature conditions that cause quality degradation.
2Reliability
If long-duration high-temperature stabilization annealing is used to stabilize the bonding interface, then bonding interface stabilization is improved, but production time and costs increase
Solution Approach 1:
The plasma treatment is performed as a preliminary step before bonding, preparing the surface to facilitate rapid and stable bonding. This preliminary preparation eliminates the need for extended high-temperature annealing processes, significantly reducing production time while maintaining bonding interface quality.
Solution Approach 2:
The patent skips the conventional long-duration high-temperature annealing step by using plasma treatment to achieve bonding interface stabilization in a much shorter time frame, thereby rushing through the process efficiently without compromising reliability.
3Strength
If extensive high-temperature annealing is applied to stabilize the bonding interface, then bonding energy is increased, but thin layer defects increase
Solution Approach 1:
The patent changes the thermal processing parameters from high-temperature extended annealing to lower-temperature plasma treatment followed by brief annealing. This parameter modification increases bonding energy through plasma-induced surface activation while avoiding the generation of thin layer defects associated with prolonged high-temperature exposure.
Solution Approach 2:
The patent replaces the conventional thermal annealing mechanism with plasma treatment to achieve bonding interface stabilization. The plasma process provides chemical and physical surface modification that enhances bonding energy without relying on extended high-temperature thermal fields that create defects in the thin layer.
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 effectively stabilizes the bonding interface with fewer defects and reduced heat exposure, maintaining the quality of the thin layer and reducing production costs while ensuring strong adhesion and electrical properties.
Implementation Method 1
thermal treatment of this resulting structure to stabilize the bonding interface between the thin layer and the substrate support, such as by performing one or more rapid thermal annealing ("RTA") operations
Implementation Method 2
exposing an exposed face of the donor substrate and/or an exposed face of a support substrate to plasma to facilitate bonding of the donor substrate to the support substrate
Data Source
AI summary
A method and/or system are provided for producing a structure comprising a thin layer of semiconductor material on a substrate. The method includes creating an area of embrittlement in the thickness of a donor substrate, bonding the donor substrate with a support substrate and detaching the donor substrate at the level of the area of embrittlement to transfer a thin layer of the donor substrate onto the support substrate. The method also includes thermal treatment of this resulting structure to stabilize the bonding interface between the thin layer and the substrate support. The invention also relates to the structures obtained by such a process.