Integrated Waveguide Semiconductor Package for Automotive Radar
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Solution Overview
Problem
The integration of automotive radar systems in vehicles increases costs due to the need for significant circuit board space and complex packaging in semiconductor devices, which hinders efficient radar signal propagation and detection.
Innovation Solution
A packaged semiconductor device with an integrated waveguide is developed, where a semiconductor die is attached to a package substrate in a flip-chip arrangement, with pre-formed waveguides and antenna radiators exposed in air cavities, allowing efficient radar signal transmission and reception while minimizing circuit board space and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional radar systems are integrated into vehicles, then radar detection functionality is achieved, but circuit board space requirements and system costs increase significantly
Solution Approach 1:
The patent combines the waveguide structure with the semiconductor package substrate, integrating what were previously separate components (radar transceiver die, package substrate, and waveguide) into a single integrated unit. This merging eliminates the need for separate waveguide components and reduces overall circuit board space requirements while maintaining radar detection functionality
Solution Approach 2:
The waveguide is nested within or integrated onto the package substrate, with the antenna radiator positioned within the waveguide structure. This nesting approach allows multiple functional elements to occupy overlapping or adjacent spaces, minimizing the total footprint on the circuit board
2Reliability
If traditional radar systems are integrated into vehicles, then radar detection functionality is achieved, but system costs increase significantly
Solution Approach 1:
By merging the waveguide integration into the package substrate and using a flip-chip arrangement for the radar transceiver die, the patent reduces the number of separate components and assembly steps. This consolidation simplifies the overall packaging structure and reduces system costs while maintaining full radar detection functionality
3Productivity
If waveguides are integrated into the semiconductor package, then radar signal propagation efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The waveguide structure is pre-formed on the package substrate before the radar transceiver die is attached. This preliminary formation of the waveguide allows for optimized signal propagation paths and efficient radar signal transmission, while the pre-integrated structure actually simplifies subsequent assembly processes compared to adding waveguides as separate post-assembly components
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 solution enables efficient propagation of radar signals and reduces overall costs by integrating waveguides into the semiconductor package, enhancing radar system functionality without increasing vehicle costs.
Implementation Method 1
A packaged semiconductor device with integrated waveguide includes a waveguide attached to a package substrate... allowing for efficient propagation (e.g., transmit and/or receive) of radar (e.g., mmWave) signals
Data Source
AI summary
A method of manufacturing a packaged semiconductor device is provided. The method includes attaching a semiconductor die to a package substrate. A bond pad of the semiconductor die is coupled to an antenna radiator formed on the package substrate. A waveguide is attached to the package substrate. An opening of the waveguide includes sidewalls substantially surrounding the antenna radiator. An epoxy material is deposited over at least a portion of the package substrate while leaving the opening void of epoxy material.