Flexible Membrane Transfer of Conductive Patterns on Insulating Substrates
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Solution Overview
Problem
Existing methods for applying electrical conductors to electrically insulating substrates face limitations in line resolution, exact placement, and require batch processing, making them cumbersome and inefficient, especially when applying conductors to both sides of a substrate.
Innovation Solution
A method involving a flexible membrane with a pattern of grooves is used to apply a composition of electrically conductive particles and adhesive, where the membrane is contacted with the substrate, and pressure is applied to transfer the composition, followed by sintering to create conductive patterns, allowing for precise and efficient conductor application on both sides of a substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If known methods of forming conductors on electrically insulating substrates are used, then the process can be implemented, but line resolution and exact placement are limited
Solution Approach 1:
The patent employs a flexible membrane as a transfer carrier that can conform to substrate surfaces and precisely deposit conductor patterns. The membrane acts as a thin film vehicle that carries the conductor composition from a patterning element to the substrate, enabling high-resolution pattern transfer while simplifying the overall process architecture.
Solution Approach 2:
The flexible membrane serves as an intermediary between the patterning element and the substrate. It receives the conductor composition pattern from the patterning element, maintains pattern integrity during handling, and transfers it precisely to the substrate surface, thereby achieving exact placement and high line resolution.
2Productivity
If known methods are used to apply conductors to both sides of a substrate, then each side must be processed separately, but this makes the process cumbersome and reduces productivity
Solution Approach 1:
The patent merges the processing of both substrate sides into a single operational sequence. By using the flexible membrane as a reusable transfer carrier, the system can apply conductor patterns to one side, then flip the substrate and apply patterns to the opposite side without requiring separate batch processing cycles, thereby doubling productivity while maintaining operational simplicity.
Solution Approach 2:
The flexible membrane is pre-loaded with the conductor composition pattern before substrate processing begins. This preliminary preparation allows the membrane to serve as a ready-to-use stamp for multiple substrates or for both sides of a single substrate, eliminating the need for repeated composition application steps and streamlining the overall process.
3Productivity
If batch processing is used, then equipment complexity is reduced, but processing time increases and productivity decreases
Solution Approach 1:
The patent enables continuous processing by using the flexible membrane as a reusable transfer carrier that can be repeatedly loaded with conductor composition and applied to multiple substrates or both sides of a substrate in sequence. This continuous action eliminates idle time between batch cycles while maintaining relatively simple equipment architecture.
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 method enhances the precision and efficiency of conductor application, improving line resolution and enabling the formation of conductive patterns on non-planar substrates without the need for batch processing, while maintaining the integrity of the substrate.
Implementation Method 1
a composition that includes, as composition components, electrically conductive particles and an adhesive
Implementation Method 2
applying sufficient energy to sinter the electrically conductive particles in order to render electrically conductive the pattern of composition transferred to the substrate from the grooves
Data Source
AI summary
A method is disclosed for applying an electrical conductor to an electrically insulating substrate, which comprises providing a flexible membrane with a pattern of groove formed on a first surface thereof, and loading the grooves with a composition comprising conductive particles. The composition is, or may be made, electrically conductive. Once the membrane is loaded, the grooved first surface of the membrane is brought into contact with a front or/and back of the substrate. A pressure is then applied between the substrate and the membrane(s) so that the composition loaded to the grooves adheres to the substrate. The membrane(s) and the substrate are separated and the composition in the groove is left on the surface of the electrically insulating substrate. The electrically conductive particles in the composition are then sintered to form a pattern of electrical conductors on the substrate, the pattern corresponding to the pattern formed in the membrane(s).