End Launch Termination Device for Signal Reflection Control
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Solution Overview
Problem
During semiconductor component testing, signal reflections from other chipsets on the test substrate interfere with the evaluation of individual components, making it difficult to optimize testing.
Innovation Solution
An end launch termination device is designed to minimize signal reflections by incorporating a termination body with a clamp system and a coaxial structure that includes a central conductor, spacers, and a resistor, which provides a matched impedance to terminate RF signals without reflections, combining the functions of an end launch connector and coaxial termination in a single device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple chipsets are mounted on a single test substrate, then testing efficiency is improved, but signal reflections from other chipsets interfere with testing of individual components
Solution Approach 1:
The patent extracts the termination function from the test substrate design by adding separate termination devices. Each chipset is paired with its own termination device that is selectively engageable, allowing the harmful signal reflections to be eliminated by removing or disconnecting unused chipsets and their associated terminations from the test substrate, thus preventing interference while maintaining multi-chipset testing capability.
Solution Approach 2:
The termination device acts as an intermediary between the chipset and the test substrate signal lines. It provides a controlled impedance path to ground for unused chipsets, mediating the signal reflections by absorbing or diverting them away from the active chipset under test, thus eliminating interference while allowing multiple chipsets to coexist on the same substrate.
2Object-affected harmful factors
If separate coaxial terminations are used for each chipset, then signal reflection minimization is improved, but device complexity increases
Solution Approach 1:
The patent merges the end launch connector and coaxial termination functions into a single integrated termination device. This combination eliminates the need for separate coaxial cables and terminations, reducing device complexity while maintaining the signal reflection minimization capability through the integrated coaxial structure and termination resistor.
Solution Approach 2:
The termination device is designed with universal functionality to serve multiple purposes: it provides end launch connection, coaxial termination, and signal reflection minimization all in one component. The device can be selectively engaged or disconnected, and the termination resistor value can be chosen to match the system impedance, making it a multi-functional solution that replaces multiple separate components.
3Measurement precision
If termination devices are added to minimize signal reflections, then testing precision is improved, but manufacturing complexity increases
Solution Approach 1:
The termination devices are pre-attached to the test substrate during manufacturing, with the clamp mechanisms pre-positioned to engage with the chipset packaging. This preliminary action simplifies the overall manufacturing process by eliminating the need for complex assembly steps after chipset mounting, as the termination devices are already in place and ready to be engaged or disconnected as needed.
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
The end launch termination device effectively minimizes signal reflections, optimizing component testing by maximizing voltage standing wave ratio (VSWR) and eliminating the need for separate coaxial terminations, thus reducing complexity and costs while enabling broadband and high-frequency applications.
Implementation Method 1
a coaxial structure that includes a central conductor, spacers, and a resistor, which provides a matched impedance to terminate RF signals without reflections
Data Source
AI summary
End launch termination devices are shown and disclosed. In one embodiment, the device includes a housing, a first clamp fixedly attached to the housing, and a second clamp opposed to the first clamp and movably attached to at least one of the first clamp or the housing, the first and second clamps defining a gap therebetween to receive a test substrate. The device additionally includes a conductor received in the cavity and fixedly attached to the housing, a center pin attached to the conductor and extending into the gap, and a rod resistor received in the cavity, attached to the conductor, and extending out of the housing.