Molded Interconnect Substrate Laser Direct Structuring Precision
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Solution Overview
Problem
Conventional methods of manufacturing printed circuit boards (PCBs) are limited by manufacturing tolerances, resulting in inaccuracies and imprecisions in positioning features and components, which complicates the assembly of communication cable assemblies and requires additional components and processes for termination.
Innovation Solution
A molded interconnect substrate with a conductive circuit formed via laser direct structuring technology, including alignment elements for precise alignment of communication cables with signal and ground contacts, and a ground-terminating component for secure electrical and mechanical coupling, offering improved manufacturing precision and reduced component complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional PCB manufacturing methods are used, then manufacturing process is well-established, but manufacturing precision is limited to +/-0.1 mm
Solution Approach 1:
The patent combines the substrate, alignment elements, and conductive circuits into a single molded interconnect substrate component. The alignment elements are integrated directly into the substrate structure, eliminating the need for separate positioning components and reducing assembly steps while achieving +/-0.05 mm precision through molded manufacturing tolerances.
Solution Approach 2:
The patent replaces conventional mechanical PCB manufacturing and assembly processes with injection molding technology. The molded interconnect substrate uses mold-based positioning features that achieve higher precision (+/-0.05 mm) compared to conventional PCB manufacturing (+/-0.1 mm), eliminating the need for post-manufacturing alignment adjustments.
2Device complexity
If conventional PCB with additional components is used, then component functionality is achieved, but device complexity increases
Solution Approach 1:
The patent integrates multiple functions into the molded interconnect substrate: the substrate provides structural support, molded-in alignment elements provide positioning, and laser-formed conductive circuits provide electrical connectivity. This consolidation eliminates the need for separate busbars, lead frames, and housing components, reducing overall device complexity while maintaining functionality.
Solution Approach 2:
The molded interconnect substrate serves multiple functions simultaneously: it acts as the structural base, provides alignment features for cable positioning, establishes electrical connections through integrated conductive circuits, and enables mechanical coupling of communication cables. This multi-functionality reduces the total component count while improving manufacturing precision.
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 approach enables the production of communication cable assemblies with enhanced accuracy, precision, and reliability, reducing manufacturing tolerances from +/-0.1 mm to +/-0.05 mm and simplifying the assembly process by integrating alignment elements and conductive circuits directly on the substrate.
Implementation Method 1
a molded interconnect substrate having a top surface and a bottom surface. The substrate has a mold component and a laser direct structuring component. An conductive circuit is formed along the top surface.
Data Source
AI summary
An electrical device includes a molded interconnect substrate having a top surface and a bottom surface, the substrate having a mold component and a laser direct structuring component. A conductive circuit is formed along the top surface having one or more signal contacts and one or more ground contacts. The electrical device includes a communication cable having a differential pair of signal conductors and a grounding element. The communication cable has a cable jacket surrounding the signal conductors and the grounding element. Each signal conductor has a wire-terminating end that is coupled to a corresponding signal contact, the wire-terminating end projecting beyond a jacket edge of the cable jacket.