Miniature Connector ESD Protection Using Voltage Variable Material Arrays
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Solution Overview
Problem
Existing ESD protection devices for miniature connectors and connection devices face issues such as aging, catastrophic failures, and difficulty in integrating effective protection due to small scale and complex designs, with current solutions often requiring significant design changes and being far from the point of origin of ESD events.
Innovation Solution
A method involving the formation of a discrete electrostatic discharge (ESD) protective array with a voltage variable material (VVM) or VVM device, which is inserted into an insulative body and connected to electrodes via gaps, allowing for modular integration into electrical devices without altering their design, providing immediate shunting of ESD to ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional ESD protection devices (silicon diodes, MOV devices) are used, then ESD protection is provided, but aging problems and catastrophic failures occur
Solution Approach 1:
The patent changes the material parameter from traditional silicon diodes/MOV devices to voltage variable material (VVM) that exhibits different electrical properties under different voltage conditions. The VVM provides high impedance under normal conditions and low impedance during ESD events, eliminating aging problems and catastrophic failures associated with traditional devices.
Solution Approach 2:
The patent employs a sacrificial zinc oxide (ZnO) layer that can be replaced after use. The ZnO layer provides initial ESD protection and can be discarded and replaced when depleted, avoiding the aging and reliability issues of permanent traditional ESD devices.
2Reliability
If ESD protection devices are added to miniature connectors, then ESD protection is provided, but the physical scale and space available are limited
Solution Approach 1:
The patent nests the ESD protection structure within the existing connector housing. The VVM array is integrated into the connector body, with electrodes and protective elements nested within the same physical space, adding protection functionality without increasing overall connector volume.
Solution Approach 2:
The patent merges the ESD protection function with the existing connector structure. The same housing and electrode system serves both signal transmission and ESD protection functions, eliminating the need for separate protection devices and maintaining miniaturization.
3Reliability
If ESD protection material is placed far from the point of origin, then ESD protection is provided, but overstress or arc propagation occurs over considerable distance
Solution Approach 1:
The patent implements local ESD protection by placing VVM arrays immediately adjacent to signal electrodes and contact points. This localized approach ensures that ESD events are shunted at their point of origin, preventing overstress and arc propagation across the connector structure.
4Reliability
If ESD protection is integrated into the electrical device design, then effective protection is provided, but design changes are required
Solution Approach 1:
The patent creates a universal ESD protection system where the VVM array and electrode structure can be applied to various connector types without redesigning the core protection mechanism. The same basic structure serves multiple functions: signal transmission, ESD protection, and structural support.
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
This solution effectively integrates ESD protection into miniature connectors and devices without altering their design, ensuring immediate and efficient shunting of ESD events, reducing the risk of damage and maintaining the device's functionality and fit.
Implementation Method 1
a plurality of contacts connected to one another and to a ground conductor through gaps filled with a voltage variable material (VVM) or a VVM device
Implementation Method 2
gaps filled with a voltage variable material (VVM) or a VVM device
Data Source
AI summary
Electrostatic discharge protection, also known as ESD protection, is provided in the form of a discrete array with a voltage variable material (VVM) or a VVM device. The array is fabricated with a common electrode for connection to ground, and one or more electrodes configured for connection to an electrical component. The electrical component is a connector attached to an electrical circuit containing devices subject to damage by ESD events. The array is placed into a pocket or space on the connector and is held in place mechanically by spring force or by soldering to leads or electrodes of the connector. The array may be soldered to a ground connection or held in place by pressure, such as from a spring or from an outer housing or shell. In some embodiments, the array is removable from the component without affecting component circuits other than removal of ESD protection.