Conductive Particle Interconnect Switch with Electroactive Polymer
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Solution Overview
Problem
Conventional electrical switches face challenges in efficiently controlling electrical flow due to resistance variations during thermal cycling, leading to intermittent contacts and electrical glitches.
Innovation Solution
The integration of an electroactive polymer (EAP) structure with a conductive particle interconnect (CPI) that changes resistance based on an applied electrical field, allowing the switch to transition between open and closed states, and intermediate positions, thereby maintaining consistent electrical conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrical switches are used, then electrical flow can be controlled, but resistance variations during thermal cycling cause intermittent contacts and electrical glitches
Solution Approach 1:
The patent uses an electroactive polymer structure that changes its physical state in response to electrical fields, enabling the switch to transition between open and closed states while maintaining consistent electrical conductivity despite thermal cycling. The CPI's resistance can be dynamically adjusted through the EAP's deformation, compensating for thermal effects.
Solution Approach 2:
The invention combines conductive particles embedded in an elastomeric carrier to form a composite CPI structure. This composite material provides both mechanical flexibility to accommodate thermal expansion/contraction and electrical conductivity to maintain reliable electrical connections during thermal cycling.
2Reliability
If mechanical switches are used, then switching function is achieved, but contact reliability deteriorates due to resistance variations
Solution Approach 1:
The patent replaces traditional mechanical contact mechanisms with an electroactive polymer-based switching mechanism. The EAP structure deforms in response to electrical fields to control the CPI's electrical state, eliminating mechanical contact wear and resistance variations associated with conventional mechanical switches.
3Stability of the object's composition
If conventional switch contacts are used, then electrical connections can be made, but intermittent contacts occur during thermal cycling
Solution Approach 1:
The elastomeric carrier in the CPI is designed to accommodate thermal expansion and contraction through its inherent elasticity. The conductive particles maintain electrical pathways despite dimensional changes, ensuring stable electrical connections during thermal cycling without intermittent contacts.
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 mitigates electrical glitches during thermal cycling by ensuring continuous conductivity and allowing for multiple resistance states, enhancing the reliability of electrical switches.
Implementation Method 1
The EAP structure is configured to move between a first position and a second position in response to an electrical field
Data Source
AI summary
Provided is an apparatus comprising a conductive particle interconnect (CPI) and an electroactive polymer (EAP) structure. The CPI includes an elastomeric carrier and a plurality of conductive particles dispersed therein. The EAP structure is disposed around at least a portion of the CPI. The EAP structure is configured to move between a first position and a second position in response to an electrical field. The CPI is configured to exhibit a first electrical resistance when the EAP structure is in the first position and a second, different electrical resistance when the EAP structure is in the second position.