Single-Die Semiconductor Integration Using Selective Heteroepitaxy
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Solution Overview
Problem
The integration of silicon-based and heterostructure-based electronic components in a single semiconductor device leads to increased area occupation, high manufacturing costs, high energy consumption, and poor electrical performance due to parasitic capacitances and complex bonding processes.
Innovation Solution
A manufacturing process that forms an epitaxial region of a single semiconductor material on one portion of a substrate and an epitaxial multilayer with a heterostructure on another portion, allowing for the integration of silicon-based and heterostructure-based electronic components in a single die without the need for complex bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If silicon-based and heterostructure-based electronic components are integrated in separate dice, then good crystallographic quality and electrical performance of each component type is achieved, but area occupation increases and manufacturing cost rises
Solution Approach 1:
The patent merges separate silicon-based and heterostructure-based dice into a single integrated die by forming both types of electronic components on the same substrate. This combining approach eliminates the need for separate dice while maintaining the crystallographic quality required for both component types, thereby reducing area occupation without sacrificing manufacturing precision.
Solution Approach 2:
The substrate is designed to support multiple functions by accommodating both silicon-based electronic components and heterostructure-based electronic components simultaneously. This multi-functional substrate serves as a universal platform that enables integration of different component types, reducing the overall system complexity and area requirement compared to using separate specialized substrates.
2Manufacturing precision
If separate dice are used for silicon-based and heterostructure-based components, then each component type operates optimally, but manufacturing cost and energy consumption increase
Solution Approach 1:
The patent combines the manufacturing processes for silicon-based and heterostructure-based components into a single integrated process flow on one substrate. This merging eliminates the need for separate fabrication, bonding, and packaging operations that would be required for separate dice, thereby reducing manufacturing cost while maintaining the electrical performance required for each component type.
Solution Approach 2:
The patent performs preliminary actions by forming both types of electronic components on the same substrate from the beginning of the manufacturing process, rather than creating separate dice and bonding them later. This preliminary integration approach eliminates subsequent bonding operations and reduces the overall manufacturing complexity and cost.
3Adaptability or versatility
If separate dice are bonded together to integrate different components, then both component types are included in one device, but parasitic capacitances increase and electrical performance deteriorates
Solution Approach 1:
The patent merges silicon-based and heterostructure-based components into a single die structure, eliminating the physical interface between separate dice. This direct integration removes the parasitic capacitances that would be introduced by bonding interfaces, thereby maintaining high electrical performance while achieving the versatility of integrating multiple component types in one device.
4Adaptability or versatility
If die-transfer technology is used to bond separate dice, then integration of different components is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the formation of silicon-based and heterostructure-based components into a single manufacturing process on one substrate, eliminating the need for complex die-transfer and bonding operations. This approach maintains integration capability while significantly reducing device complexity by avoiding multiple processing steps and intermediate handling operations.
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 enables the integration of both types of components in a single die, reducing area occupation and manufacturing costs while improving electrical performance by minimizing parasitic capacitances and allowing direct electrical connections.
Implementation Method 1
forming an epitaxial multilayer (49) including a heterostructure (50)
Data Source
AI summary
To manufacture a semiconductor electronic device a wafer is provided that has a substrate layer of semiconductor material having a first portion and a second portion distinct from the first portion. An epitaxial region of a single semiconductor material is grown on the first portion of the substrate layer. An epitaxial multilayer having a heterostructure is grown on the second portion of the substrate layer. A first electronic component based upon the single semiconductor material is formed starting from the epitaxial region and a second electronic component based upon a heterostructure is formed starting from the heterostructure. To grow an epitaxial multilayer, a growth mask is formed on the substrate layer; an opening is made in the growth mask, thereby exposing the second portion of the substrate layer; and the epitaxial multilayer is grown on the second portion of the substrate layer.