Semiconductor Probe Head Layout for High-Throughput Thermal Testing
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Solution Overview
Problem
Existing semiconductor technologies face challenges in effectively testing and packaging semiconductor devices, particularly in the areas of coplanarity, die shift, thermal management, and advanced packaging configurations, which impact yield, performance, and reliability, and are not adequately addressed by current testing methods.
Innovation Solution
A semiconductor testing device with probe heads, handler wafers, and integrated cooling channels, capable of testing semiconductor devices under varying temperatures and thermal conditions, and supporting advanced packaging configurations, including fine pitch testing and thermal management, to ensure reliability and quality assurance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple semiconductor devices are tested simultaneously using traditional testing methods, then testing throughput is improved, but thermal management becomes difficult and measurement precision deteriorates due to heat interference
Solution Approach 1:
The system divides the testing process into individual device testing units, where each probe head tests one device at a time. This segmentation allows precise thermal control for each device while maintaining overall high throughput through parallel processing of multiple devices in sequence.
Solution Approach 2:
The system transitions from traditional planar testing to a three-dimensional configuration with devices stacked vertically on the handler wafer. This vertical arrangement enables improved thermal management by allowing heat dissipation in the vertical dimension while maintaining high testing throughput through rapid device-to-probe-head engagement.
2Ease of operation
If traditional testing fixtures are used, then device testing is simplified, but thermal management capability is insufficient and reliability deteriorates
Solution Approach 1:
The handler wafer serves multiple functions: it holds the device under test, provides thermal management through integrated cooling channels, enables precise positioning, and facilitates electrical connections. This multi-functionality maintains operational simplicity while dramatically improving thermal management capability and device reliability.
Solution Approach 2:
The handler wafer acts as an intermediary between the device under test and the testing system. It provides a controlled thermal environment through integrated cooling channels while maintaining electrical connections and mechanical support, thereby improving reliability without complicating the testing operation.
3Ease of manufacture
If devices are tested in conventional configurations, then testing setup is straightforward, but advanced packaging configurations cannot be tested and adaptability deteriorates
Solution Approach 1:
The system employs dynamic probe heads that can be positioned and configured to test different device locations and orientations. The handler wafer can accommodate devices in various configurations (front-side up, back-side up, edge-up), enabling the system to adapt to advanced packaging configurations while maintaining straightforward testing setup through automated positioning.
4Use of energy by moving object
If power is delivered during testing using traditional methods, then device operation is maintained, but power delivery precision is insufficient and yield deteriorates
Solution Approach 1:
The system replaces traditional mechanical power delivery methods with a more precise electrical connection system through the handler wafer. The integrated cooling channels and electrical connections provide precise power delivery control, reducing variability and improving testing yield while maintaining device operation during testing.
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 device enhances the reliability and yield of semiconductor devices by accurately testing individual components, reducing waste, and ensuring compliance with industry standards through precise power delivery and thermal management, supporting advanced packaging technologies.
Implementation Method 1
the handler wafer includes integrated cooling channels configured to spread and remove heat from the semiconductor wafer
Implementation Method 2
the handler wafer includes integrated cooling channels configured to spread and remove heat from the semiconductor wafer
Implementation Method 3
the handler wafer includes through-silicon via (TSV) configured to spread and remove heat from the semiconductor wafer
Data Source
AI summary
A testing device includes N devices, and N−1 probe heads. N is an integer. An M-th probe head includes devices 1 to N-M electrically connected to each other. The M-th probe head is configured to test the M-th device, and M is an integer between 1 and N−1.