Semiconductor Package With Ceramic Isolation Layer
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Solution Overview
Problem
Existing semiconductor device packages face challenges in balancing thermal properties, size, cost, and compatibility with various types of semiconductor devices, making it difficult to optimize for competing factors like power, frequency, and operational environments.
Innovation Solution
A semiconductor device package design featuring a heatsink platform with a ceramic isolation layer, a semiconductor die on the isolation layer, mold material surrounding the die, and a redistribution layer for efficient thermal dissipation and electrical connectivity, enabling high power, high frequency performance at low cost and small package sizes, suitable for diverse semiconductor devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a package is designed with desired thermal properties, then thermal management performance is improved, but package size becomes too large for desired operational environments
Solution Approach 1:
The patent employs a composite structure combining ceramic material (high thermal conductivity) for the isolation layer and metal material (copper or aluminum) for the heatsink platform. This composite approach enables efficient thermal management while maintaining a compact package size, as the ceramic layer provides targeted thermal pathways without requiring a large overall structure.
Solution Approach 2:
The package is segmented into distinct functional layers: a ceramic isolation layer bonded to the heatsink platform, with the semiconductor die positioned on the ceramic layer. This segmentation allows the thermal management function to be localized to specific regions (through the ceramic layer's thermal conductivity) rather than requiring the entire package to be large, thus improving thermal performance while controlling package size.
2Reliability
If packaging is optimized for a particular type of semiconductor device, then performance for that device type is improved, but the package becomes unsuitable for other types of semiconductor devices
Solution Approach 1:
The package structure is designed with universal compatibility through its modular layered architecture. The ceramic isolation layer bonded to the heatsink platform creates a standardized interface that can accommodate different types of semiconductor devices (e.g., GaN transistors, RF devices, power devices). The redistribution layer further enhances versatility by providing adaptable electrical connectivity options. This universal design enables the same package structure to support multiple device types while maintaining optimized performance for each.
3Power
If thermal management is enhanced through package design, then power handling capability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The ceramic isolation layer serves as an intermediary element between the semiconductor die and the heatsink platform. This ceramic layer mediates thermal transfer from the die to the heatsink while providing electrical isolation. The intermediary approach simplifies manufacturing compared to direct metal-to-die bonding, as the ceramic layer can be pre-bonded to the heatsink platform, creating a standardized substrate that reduces assembly complexity while maintaining enhanced thermal management and power handling capabilities.
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 described package design achieves efficient thermal management and low-loss electrical connections, supporting high power and frequency applications while being cost-effective and scalable for large volume production, suitable for devices like GaN transistors and RF devices.
Implementation Method 1
a ceramic isolation layer bonded to the heatsink platform... efficient thermal management
Implementation Method 2
heatsink platform... efficient thermal management... high power, high frequency performance
Implementation Method 3
heatsink platform... thermal dissipation
Implementation Method 4
mold material disposed on the ceramic isolation layer and surrounding at least a portion of the semiconductor die
Implementation Method 5
a redistribution layer disposed on the semiconductor die and the mold material... low-loss electrical connections
Data Source
AI summary
A semiconductor device package includes a heatsink platform, with a ceramic isolation layer bonded to the heatsink platform. A semiconductor die may be disposed on the ceramic isolation layer, with mold material disposed on the ceramic isolation layer and surrounding at least a portion of the semiconductor die. A redistribution layer may be disposed on the semiconductor die and the mold material. Such packages, and similar, enable the use of a thin, inexpensive device substrate, while providing an efficient thermal path to the heatsink platform, while the redistribution layer enables electrical connections that are short, low-resistance, low-inductance, and low-loss connections.