Magnetic Chuck Assembly for Tool-Free DUT Swap
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Solution Overview
Problem
Traditional integrated circuit testing systems require frequent changes of contact chucks for different DUTs, which is time-consuming and inefficient due to the need for manual removal and reinstallation of multiple fasteners, limiting the ability to quickly switch between various DUT types and sizes.
Innovation Solution
A magnetically retained contact chuck test head assembly that allows for easy swapping without tools, utilizing magnets for alignment and attachment to a handler, along with a DUT layout unit that includes a heatsink and pneumatic retention for efficient handling and testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual fasteners are used to secure the contact chuck, then the connection is strong and reliable, but the changeover time is long and efficiency is low
Solution Approach 1:
The patent replaces the traditional mechanical fastener system (screws, bolts, clips) with a magnetic field-based retention system. Magnets embedded in the contact chuck base unit provide automatic retention when the contact chuck unit is brought into proximity, eliminating the need for manual fastening operations while maintaining secure connection during testing.
Solution Approach 2:
The magnetic retention system provides self-aligning and self-retaining functionality. When the contact chuck unit is approached to the base unit, the magnetic field automatically guides alignment and secures the connection without requiring manual intervention for fastening or tightening operations.
2Stability of the object's composition
If multiple fasteners are used to secure the contact chuck, then the connection is stable, but the number of components increases and complexity increases
Solution Approach 1:
The patent extracts the fastening function from the mechanical component system and transfers it to the magnetic field. This eliminates the need for multiple discrete fasteners (screws, clips, or latches) and replaces them with a distributed magnetic field generated by magnets embedded in the base unit, simplifying the overall assembly.
Solution Approach 2:
The magnetic retention system serves multiple functions simultaneously: it provides retention force, enables self-alignment, and allows for quick release. A single magnetic field-based system replaces what would traditionally require multiple separate mechanical components each performing single functions.
3Strength
If traditional fasteners are used, then the structural strength is sufficient, but the ease of operation is reduced and tool requirements increase
Solution Approach 1:
The patent substitutes mechanical fastening operations with magnetic field-based retention. The magnetic force provides sufficient holding strength during testing while allowing for tool-free, hands-free attachment and detachment operations, dramatically improving ease of operation.
Solution Approach 2:
The magnetic field acts as an intermediary between the contact chuck unit and the base unit, providing the retention force without requiring direct mechanical engagement of fasteners. This intermediary magnetic field enables both strong retention and easy operation.
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
Enables rapid and tool-free changeover of contact chucks, improving testing efficiency by eliminating the need for manual fastener removal and reinstallation, accommodating different DUT sizes and types, and enhancing handling and thermal management during testing.
Implementation Method 1
Magnets are employed at an interface between the DUT contact unit and contact chuck base. This allows the DUT contact unit to be brought into close proximity to the contact chuck base portion and magnetic forces act to both align and mate the two parts together.
Implementation Method 2
The contact chuck test head assembly is configured to apply a force to the DUT in a test fixture during testing of the DUT.
Data Source
AI summary
Embodiments of the present invention provide a contact chuck test head for a handler of an integrated circuit tester system. The contact chuck test head comprises a magnetically held DUT contact unit that can be replaced by a technician without requiring any tool or special equipment. The contact chuck test head t is mounted to an automated handler. Magnets are employed at an interface between the DUT contact unit and contact chuck base. This allows the DUT contact unit to be brought into close proximity to the contact chuck base portion and magnetic forces act to both align and mate the two parts together. Since the DUT contact unit requires change out to accommodate different sizes and types of DUTs, it is advantageous to provide an easy swap-out mechanism.