Functionalized Organosiloxane Network Coating for Silver Conductors
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Solution Overview
Problem
Silver migration between conductors in electronic circuits, particularly in the presence of moisture and electric bias, leads to dendrite formation, causing insulation resistance loss and circuit failures, limiting the applications of silver-based conductive inks in printable electronics.
Innovation Solution
A conductor comprising a silver conducting member coated with a functionalized organosiloxane network that includes functional groups capable of trapping silver or silver ions, formed by reacting organosiloxane network precursors with functionalization precursors, inhibiting dendrite formation and silver migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If silver-based conductive inks are used in printable electronics, then manufacturing ease and cost are improved, but silver migration and dendrite formation occur leading to circuit failures
Solution Approach 1:
The patent introduces an organosiloxane network as an intermediary coating between the silver conductor and the environment. This network contains functional groups that actively trap silver ions, preventing their migration. The intermediary layer thus mediates the interaction between silver and moisture/electric field, blocking the harmful electrochemical migration process while maintaining the benefits of silver-based conductive inks in printable electronics.
Solution Approach 2:
The patent creates a composite structure consisting of the silver conductor combined with an organosiloxane network coating. This composite material integrates the high conductivity of silver with the protective and ion-trapping properties of the organosiloxane network, achieving both ease of manufacture in printable electronics and improved circuit reliability by preventing silver migration.
2Reliability
If coatings are applied to prevent silver migration, then circuit reliability is improved, but device complexity and processing steps increase
Solution Approach 1:
The patent modifies the chemical parameters of the coating material by using an organosiloxane network with specific functional groups capable of trapping silver ions. This parameter change in the coating's chemical composition enables effective silver migration prevention while maintaining a relatively simple application process, as the functionalized organosiloxane can be applied as a coating layer without requiring complex multilayer structures.
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
The functionalized organosiloxane network effectively prevents silver migration, maintaining resistance between conductors for extended periods, even under water drop tests, thus enhancing the reliability of silver-based conductive inks in electronic circuits.
Implementation Method 1
a functionalized organosiloxane network having at least one functional group capable of trapping silver or a silver ion
Implementation Method 2
a functionalized organosiloxane network coating the at least one conducting member
Data Source
AI summary
The present disclosure relates to conductors comprising a conducting member comprising silver and a functionalized organosiloxane network having at least one functional group capable of trapping silver or a silver ion as well as to methods of preparing the same. For example, the functionalized organosiloxane network can at least substantially inhibit dendrite formation between a first conducting member and a second conducting member. For example, the conductors may be used in an electronic circuit such as a printed electronic circuit.