Flexible Circuit Right-Angle Interconnect for ATE Socket Cards
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Solution Overview
Problem
Existing interconnect technologies in Automated Test Equipment (ATE) systems are limited by density, performance, and flexibility, particularly in achieving high-density, high-performance right-angle connections, which are costly and minimally reusable, and struggle with the increasing diversity of memory device packaging formats.
Innovation Solution
The use of flexible circuits with a defined shape to interface with socket card assemblies along one plane and printed circuit boards along perpendicular planes, enabling high-density, right-angle connections that are economical, reliable, and reusable, while maintaining signal integrity and allowing for parallel testing of multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct soldering of pre-terminated coaxial cables to the socket card assembly is used, then connection reliability is improved, but manufacturing cost increases and reusability decreases
Solution Approach 1:
The patent changes the connection method from permanent soldering to a removable mechanical connection using a flexible circuit with a connector. This allows the socket card assembly to be reused with different transmission line assemblies, reducing manufacturing costs while maintaining reliable electrical connections through the flexible circuit's connector interface.
Solution Approach 2:
The patent divides the interface into separate reusable components: the socket card assembly remains fixed while transmission line assemblies can be removed and replaced. The flexible circuit enables this segmentation by providing electrical connections that work across the right-angle mechanical interface, allowing individual components to be manufactured separately and recombined.
2Adaptability or versatility
If pin-socket or coaxial connection systems are used, then reusability is improved, but connection density decreases
Solution Approach 1:
The patent employs a right-angle connection geometry where the flexible circuit transitions from a horizontal orientation on the socket card assembly to a vertical orientation connecting to the transmission line assembly. This dimensional change allows high-density connections without requiring dense pin-socket arrays, as connections are distributed across two perpendicular planes.
Solution Approach 2:
The flexible circuit itself acts as the connection medium, replacing traditional pin-socket or coaxial systems. Its flexibility allows it to navigate the right-angle transition while maintaining electrical connections, enabling high-density signal routing in a compact space that would be impossible with rigid pin-socket arrangements.
3Reliability
If the entire interface assembly is made device-specific with permanent connections, then signal integrity is improved, but adaptability to different device packages decreases
Solution Approach 1:
The socket card assembly becomes a universal platform that can interface with different transmission line assemblies designed for various device package types. The flexible circuit enables this universality by providing reliable electrical connections that work across different configurations, allowing the same socket card assembly to support multiple device types without permanent device-specific modifications.
Solution Approach 2:
The patent extracts the device-specific portion into a removable transmission line assembly that can be replaced based on the device under test, while the core socket card assembly remains universal. The flexible circuit enables this extraction by maintaining electrical connections during the separation and reconfiguration of components, preserving signal integrity while enabling adaptability.
4Volume of moving object
If right-angle connections are implemented with traditional methods, then space utilization is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The flexible circuit provides a straightforward manufacturing solution for right-angle connections, eliminating the need for complex rigid mechanical structures or multiple connectors. The flexible circuit can be manufactured as a single integrated component that naturally conforms to the right-angle geometry, reducing assembly steps and manufacturing complexity while achieving compact space utilization.
Data Source
AI summary
There is disclosed apparatus for routing signals between at least one PCB within a test head and a socket card assembly. In an embodiment, the apparatus may include at least one flexible circuit electrically connecting first and second sides of the PCB and the socket card assembly with one another, and the flexible circuit having a defined shape configured to interface with the socket card assembly and the PCB along substantially perpendicular planes. Methods of routing signals between at least one PCB within a test head and a socket card assembly are disclosed. In one embodiment, a method may include electrically connecting first and second sides of the PCB and the socket card assembly with one another with at least one flexible circuit having a defined shape configured to interface with the socket card assembly and the PCB along substantially perpendicular planes. Other embodiments are also disclosed.