Pogo Pin Cooling System for High-Power Electronic Device Testing
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Solution Overview
Problem
The increasing complexity and power requirements of modern electronic devices during testing lead to excessive heat generation, causing solder balls to melt and stick to pogo pins, resulting in test failures and potential damage to the chip or testing apparatus.
Innovation Solution
A pogo pin cooling system utilizing a coolant circulation module with a supply channel and recovery channel to circulate coolant through the pogo pins and solder ball contacts, maintaining a controlled temperature and preventing melting, along with a gas supply module for purging residual coolant after testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of pogo pins is increased to accommodate more functions and higher density, then the testing capability and functionality are improved, but the heat generation increases causing solder balls to melt and stick to pogo pins
Solution Approach 1:
The cooling system is divided into multiple independent cooling channels, with each channel dedicated to cooling specific pogo pins. This segmentation allows targeted cooling of high-heat-generation areas while maintaining overall system functionality. The cooling channel is divided into a first cooling channel for the first pogo pin and a second cooling channel for the second pogo pin, enabling localized thermal management.
Solution Approach 2:
A coolant is introduced as an intermediary substance to transfer heat away from the pogo pins and solder balls. The coolant circulates through the cooling channels, absorbing heat from the high-temperature components and preventing direct thermal contact between the pogo pins and solder balls, thereby preventing melting and sticking.
2Power
If power applied to the chip is increased to 800W-2600W for complex functions, then the testing accuracy and functionality are improved, but the solder balls are heated to melting point and may melt and stick to pogo pins
Solution Approach 1:
The cooling system is activated before and during the high-power testing to prevent solder ball melting before it occurs. By pre-cooling the pogo pins and solder balls and maintaining continuous cooling during high-power operation, the system counteracts the thermal stress before it can cause damage, ensuring solder ball integrity throughout the testing process.
Solution Approach 2:
The cooling system incorporates temperature monitoring and control mechanisms that provide feedback on the thermal state of the pogo pins and solder balls. This feedback enables dynamic adjustment of coolant flow rates and cooling channel activation to maintain temperatures below the melting point of solder balls during high-power testing operations.
3Manufacturing precision
If the density of pogo pins is increased to match smaller chip volume, then the manufacturing precision and functionality are improved, but the heat concentration increases causing solder balls to soften at 120°C
Solution Approach 1:
The cooling system implements local quality by providing differentiated cooling solutions for different regions of the pogo pin array. Areas with higher pogo pin density and greater heat generation receive enhanced cooling through additional cooling channels or increased coolant flow, while areas with lower heat generation receive proportionally less cooling. This localized approach addresses the specific thermal challenges of high-density configurations.
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
Effectively cools pogo pins and solder balls during testing, preventing contamination and ensuring reliable chip and apparatus operation by maintaining a stable temperature and ensuring cleanliness and dryness of the test socket.
Implementation Method 1
the coolant passes through the pogo pins and then flows into the coolant recovery channel through the outlet
Implementation Method 2
the coolant circulation module supplies the coolant into the chip socket through the coolant supply channel
Implementation Method 3
the gas supply module supplies a purge gas into the chip socket through the inlet to urge the coolant to the at least one coolant recovery channel
Data Source
AI summary
The present invention relates to a pogo pin cooling system and a pogo pin cooling method and an electronic device testing apparatus having the system. The system mainly comprises a coolant circulation module, which includes a coolant supply channel communicated with an inlet of a chip socket and a coolant recovery channel communicated with an outlet of the chip socket. When an electronic device is accommodated in the chip socket, the coolant circulation module supplies a coolant into the chip socket through the coolant supply channel and the inlet, and the coolant passes through the pogo pins and then flows into the coolant recovery channel through the outlet.