Test Head Docking Mechanism With Segmented Pins And Catch
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Solution Overview
Problem
The increasing complexity and size of test heads in integrated circuit testing systems pose challenges in accurately and repeatably positioning them with respect to peripherals due to the large number of delicate electrical connections and the weight of the test heads, which complicates the docking process and can lead to damage of fragile contacts.
Innovation Solution
A method and apparatus for docking a test head to a peripheral using docking pins that engage with a catch mechanism, where a piston prevents the catch from rotating, allowing precise alignment and secure docking, and fluid-operated mechanisms facilitate precise positioning and grasping of the pins for final alignment and docking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the test head is made larger to accommodate more electrical connections, then the number of connections is improved, but the positioning accuracy deteriorates
Solution Approach 1:
The docking mechanism is divided into multiple independent docking pins, each responsible for a specific alignment function. Each pin has its own catch and positioning features, allowing independent control and adjustment of each connection point's alignment, thereby maintaining positioning accuracy even as the total number of connections increases.
Solution Approach 2:
A catch mechanism serves as an intermediary element between the docking pin and the test head. The catch engages with the docking pin to secure it in position, providing a reliable intermediate step that ensures accurate positioning without requiring direct manual alignment of the entire test head assembly.
2Adaptability or versatility
If the test head is made heavier to include more electronics, then the functionality is improved, but the ease of operation deteriorates
Solution Approach 1:
The positioning system uses multiple lightweight docking pins distributed across the test head rather than relying on a single heavy positioning mechanism. This segmentation allows the heavy test head to be positioned through the coordinated action of multiple light pins, improving ease of operation while maintaining full functionality.
Solution Approach 2:
The catch mechanism automatically engages with the docking pins to secure them in position without requiring manual intervention or complex operation. The self-acting nature of the catch reduces the operational burden on the user, making it easier to position and secure the heavy test head.
3Device complexity
If the cable and cooling tubing are bundled together, then the device complexity is reduced, but the positioning precision deteriorates
Solution Approach 1:
The cable and cooling tubing are segmented into separate, independent bundles rather than being tightly coupled together. This segmentation allows each component to be managed and positioned independently, preventing the bundled arrangement from interfering with the precise alignment required for docking while still maintaining overall system integration.
4Quantity of substance
If the electrical contacts are made more delicate to increase connection density, then the connection density is improved, but the reliability deteriorates
Solution Approach 1:
The catch mechanism provides beforehand cushioning by securely holding each delicate electrical contact in its designated position during the docking process. This prevents accidental displacement or damage to the fragile contacts, maintaining reliability even as connection density increases with more delicate contacts.
Solution Approach 2:
The catch acts as an intermediary protective element between the delicate electrical contacts and the external environment. It secures the contacts in place during positioning and docking operations, shielding them from mechanical stress and ensuring reliable connections despite their delicate nature and high density.
Data Source
AI summary
A method and apparatus for docking a test head to a peripheral. A docking pin (150) is moved past a projection (803) in a catch (802). The docking pin is further moved until the catch rotates and the projection in the catch engages a notch or indentation (152, 156) in the docking pin. A piston (620) is moved on to the catch so that the catch is prevented from rotating. The piston is further moved so that the test head is docked to the peripheral.