Embedded Fabric Electronics With Flexible Interconnect Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Incorporating electrical components into fabric items is challenging due to the flexibility of fabric, which can cause signal paths to be damaged or components to become dislodged when bent or stretched.
Innovation Solution
Interlacing equipment with individually adjustable components allows for the insertion and embedding of electrical components into fabric during its creation, using conductive strands and interconnect structures to securely couple them, ensuring uninterrupted interlacing operations and robust mechanical and electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electrical components are mounted to fabric, then enhanced functionality is provided, but the fabric flexibility causes signal paths to be damaged or components to become dislodged
Solution Approach 1:
The patent uses flexible printed circuit boards (FPC) as the mounting substrate instead of rigid boards. The FPC can bend and flex with the fabric without breaking signal paths, while still providing stable electrical connections. This resolves the contradiction by making the circuit carrier itself flexible to match the fabric's movement characteristics.
Solution Approach 2:
The patent introduces adhesive layers and protective coatings as intermediary elements between the electrical components and the fabric. These intermediaries absorb mechanical stress and prevent direct transmission of fabric movement to the components and signal paths, thereby protecting against dislodgement and damage while allowing the fabric to remain flexible.
2Adaptability or versatility
If electrical components are mounted to fabric, then enhanced functionality is provided, but components may become dislodged as fabric is bent or stretched
Solution Approach 1:
The flexible printed circuit board serves as a stable platform that moves harmoniously with the fabric rather than resisting it. This prevents components mounted on the FPC from experiencing excessive stress or dislodgement while maintaining their functional positions.
Solution Approach 2:
Adhesive layers are used as intermediaries to securely bond electrical components to the flexible circuit board. These adhesives provide mechanical coupling that maintains component positioning stability even when the fabric undergoes bending or stretching movements.
3Reliability
If care is taken to protect signal paths and components, then reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The flexible printed circuit board integrates multiple functions (mechanical support, electrical connectivity, flexibility) into a single component. This reduces the need for additional protective structures and complex mounting arrangements, thereby lowering manufacturing complexity while maintaining signal path integrity.
Solution Approach 2:
The patent combines the circuit board, mounting structure, and protective elements into an integrated flexible assembly. This merging of functions reduces the number of separate components and assembly steps required, simplifying manufacturing while ensuring reliable signal paths and component positioning.
Data Source
AI summary
Fabric may include one or more conductive strands. An insertion tool may insert an electrical component into the fabric during formation of the fabric. The electrical component may include an electrical device mounted to a substrate and encapsulated by a protective structure. An interconnect structure such as a metal via or printed circuit layers may pass through an opening in the protective structure and may be used to couple a conductive strand to a contact pad on the substrate. The protective structure may be transparent or may include an opening so that light can be detected by or emitted from an optical device on the substrate. The protective structure may be formed using a molding tool that provides the protective structure with grooves or may be molded around a hollow conductive structure to create grooves. An electrical component mounted to the fabric may be embedded within printed circuit layers.