Heat Spreader Grounding Verification Test Assembly
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Solution Overview
Problem
Existing methods for testing the effective grounding of heat spreaders in high-speed data devices are inefficient, costly, and time-consuming, leading to potential electromagnetic interference issues.
Innovation Solution
A test assembly and method that electrically connects a heat spreader to a substrate ground through a grounding conductive segment, using a control system to direct a test current and measure connectivity, ensuring proper grounding and preventing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the heat spreader is electrically connected to ground through a grounding conductive segment, then electromagnetic interference is prevented, but testing the effectiveness of this grounding becomes difficult and time-consuming
Solution Approach 1:
The patent incorporates a test conductive segment during the manufacturing process that预先 establishes a test path through the grounding conductive segment. This preliminary action allows subsequent testing to be performed quickly without requiring complex reconfiguration or disassembly, thus resolving the contradiction between ensuring proper grounding and minimizing testing time
Solution Approach 2:
The test conductive segment acts as an intermediary element that provides a dedicated test path through the grounding conductive segment. This intermediary structure enables efficient testing of the grounding effectiveness without interfering with the actual grounding function, allowing quick verification while maintaining electromagnetic interference prevention
2Measurement precision
If complex testing procedures are used to verify heat spreader grounding, then measurement precision improves, but device complexity and cost increase
Solution Approach 1:
The patent merges the test conductive segment with the grounding conductive segment structure, combining the grounding function and the testing function into a single integrated design. This merging allows accurate measurement of grounding effectiveness while avoiding the complexity of separate, standalone testing apparatus
Solution Approach 2:
The grounding conductive segment is designed to be self-testing through the integrated test conductive segment. The structure enables its own verification of grounding effectiveness without requiring external complex testing equipment, thus achieving measurement precision while minimizing device complexity
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
Facilitates quick, cost-effective, and efficient verification of heat spreader grounding, ensuring effective electrical connectivity and reducing electromagnetic interference in high-speed data devices.
Implementation Method 1
The control system is electrically coupled to the input conductive segment and the board ground. Additionally, the control system directs a test current to one of the input conductive segment and the board ground to test the effectiveness of the grounding conductive segment
Data Source
AI summary
A test assembly (12) for testing a device (10) having a heat spreader (20), a package substrate (18) having a substrate ground (18G), and a grounding conductive segment (44A), includes (i) an input conductive segment (38) that is electrically connected to the heat spreader (20), (ii) a test board (28) having a board ground (30), and (iii) a control system (34) that is electrically coupled to the input conductive segment (38) and the board ground (30). During testing, the device (10) is positioned so that the substrate ground (18G) is electrically connected to the board ground (30). Additionally, the control system (34) directs a test current to one of the input conductive segment (38) and the board ground (30) to test the effectiveness of the grounding conductive segment (44A) including a first electrical interface (45A).