Smart Pins for 3D Circuit Interconnects
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Solution Overview
Problem
Current electronic devices rely on traditional methods for interconnecting circuit layers, which are limited to single-point connections and require high-temperature soldering, potentially damaging components and restricting complex circuit designs.
Innovation Solution
The development of 'smart pins' and 'smart tabs' that expand to form permanent electrical and thermal connections, allowing for 3-dimensional circuit designs with programmable conductive elements and flexible assembly options, using advanced manufacturing techniques like laser ablation and additive manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional soldering methods are used to create electrical connections between circuit layers, then reliable electrical connectivity is achieved, but components are exposed to temperatures in excess of 200°C which can destroy or shorten the life of components
Solution Approach 1:
The patent extracts the harmful thermal process (soldering) from the connection-making process. Instead of using heat-based soldering, the invention uses cold-welding techniques with smart pins and tabs that form electrical connections through mechanical pressure and conformal contact, completely eliminating exposure to temperatures above 200°C while maintaining reliable electrical connectivity between circuit layers
Solution Approach 2:
The patent replaces the thermal-mechanical soldering system with a purely mechanical cold-welding system. Smart pins with compliant surfaces and smart tabs with conformal geometries create reliable electrical connections through controlled mechanical insertion and pressure, substituting the thermal energy-based connection process with a mechanical contact-based process that avoids thermal damage to sensitive components
2Adaptability or versatility
If traditional via methods are used for electrical connections, then single-point connectivity is achieved, but complex circuit designs and high-density connections are restricted
Solution Approach 1:
The patent segments the connection interface into multiple independent contact points on both the smart pin and smart tab. Instead of a single via providing one connection, the smart pin can simultaneously establish multiple electrical connections with corresponding tabs, enabling high-density interconnects and complex circuit designs while maintaining manageable device complexity through modular contact arrangements
Solution Approach 2:
The patent transitions from two-dimensional planar connections to three-dimensional spatial connections. Smart pins can be inserted at various angles and positions, and smart tabs can be arranged in three-dimensional configurations around the pin, enabling complex circuit designs and high-density connections by utilizing the third dimension for routing and connection placement
3Reliability
If precise positioning and alignment are required for electrical connections, then connection reliability is improved, but manufacturing complexity and time increase
Solution Approach 1:
The patent introduces dynamic compliance into the connection system. Smart pins feature compliant surfaces that can deform elastically during insertion to accommodate dimensional variations and misalignments, while smart tabs have conformal geometries that adapt to the pin's position. This dynamic adaptation maintains connection reliability without requiring ultra-precise positioning, thereby improving assembly speed and productivity
Solution Approach 2:
The patent changes the physical parameters of the connection interface to be more tolerant of positioning variations. By using soft, compliant materials for smart pin surfaces and creating conformal contact geometries for smart tabs, the system allows for larger acceptable positioning tolerances while maintaining reliable electrical connections, significantly reducing manufacturing complexity and assembly time
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
Enables robust, compact, and flexible 3-dimensional circuitry with reduced thermal stress, allowing for high-density connections and programmable circuit configurations without the need for soldering, enhancing the design and assembly of electronic devices.
Implementation Method 1
laser ablation to remove circuit substrate materials
Implementation Method 2
expand in volume following insertion into a hole within an electronic component or circuit substrate
Data Source
AI summary
Systems and methods are provided to produce electromechanical interconnections within integrated circuits (ICs), printed circuit boards (PCBs) and between PCBs and other electronic components such as resistors, capacitors and integrated circuits. Elements include so-called “smart pins” or “neuro-pins” that facilitate electrical pathways in the dimension normal to the plane of a PCB. Smart pins or neuro-pins may be inserted using automated processes that do not require the high temperatures normally associated with soldering. Resultant circuits generally contain a large number of layers that are more compact and more readily constructed compared with conventional PCB-based circuitry.