Plasma Poling of Polymer Thin Films With Shadow Mask Grounding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing poling technologies for polymer thin films are slow and inefficient, particularly in mass producing electroactive polymer-based devices, as they require individual processing of each film and rely on costly photolithography and etching processes, limiting scalability and speed.
Innovation Solution
A modularized and arrayed plasma poling apparatus with a grounding method that uses a workpiece with grounding electrodes and pads, a carrier platform, and a poling chamber to achieve uniform and fast polarization of large area polymer thin films, eliminating the need for conductive electrodes on the film surfaces and integrating preparation and poling functions for increased efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional direct poling or plasma poling methods are used, then polymer thin films can be polarized, but the process is slow and can only polarize one film at a time
Solution Approach 1:
The invention divides the poling process into multiple parallel channels by using a multi-array electrode structure. Instead of polarizing one film sequentially, the system uses multiple electrode arrays that can simultaneously polarize multiple film regions or multiple films, thereby dramatically increasing productivity and reducing total processing time.
Solution Approach 2:
The invention transitions from a single-plane poling approach to a three-dimensional multi-array configuration. By stacking multiple electrode arrays in different spatial dimensions, the system enables simultaneous poling of multiple film layers or large-area films through parallel electric field application, effectively adding a temporal dimension to the poling process.
2Area of stationary object
If blanket polymer thin film is deposited and plasma poled as a whole, then large area coverage is achieved, but additional photolithography and etching processes are required to form patterned active areas
Solution Approach 1:
The invention applies local quality by using patterned electrode arrays that generate electric fields only in specific regions where active areas are needed. This allows selective poling of patterned regions directly during the poling process, eliminating the need for blanket poling followed by photolithography and etching to create patterns.
Solution Approach 2:
The invention performs preliminary patterning action by pre-configuring the electrode arrays in specific patterns before the poling process. This allows the poling step itself to simultaneously create both the polarization and the patterned active areas, performing the patterning action in advance and combining it with the poling operation.
3Ease of manufacture
If selective slit coating or screen printing is used to deposit polymer thin film in defined areas, then photolithography and etching are eliminated, but uniformity and precision of active area definition may be compromised
Solution Approach 1:
The invention replaces the mechanical deposition patterning methods (slit coating, screen printing) with an electric field-based patterning approach. By using patterned electrode arrays that generate precise electric fields, the system achieves accurate active area definition through field control rather than mechanical deposition control, thereby improving precision while maintaining manufacturing simplicity.
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 faster, more uniform, and higher yield poling of polymer thin films, allowing for the production of small-sized polarized films with improved electroactive properties, reducing production costs and eliminating the need for expensive photolithography and etching processes.
Implementation Method 1
the electric field is induced by a layer of dense electric charge which is dynamically formed by like charged species (e.g., electrons, negative ions) out of a plasma that is generated by ionized gas inside a closed chamber
Data Source
AI summary
A poling apparatus for poling a polymer thin film formed on a workpiece carried by a workpiece carrier. The workpiece has multiple grounding electrodes, grounding pads located at its edges, and a polymer thin film including multiple areas each covering only one grounding electrode. The poling apparatus includes, in a poling chamber, a poling source generating a plasma, a shadow mask below the poling source, and a Z-elevator to raise the workpiece carrier toward the shadow mask and poling source. When the workpiece in the workpiece carrier is raised to contact the underside of the shadow mask, multiple openings of the shadow mask expose only the corresponding multiple thin film areas of the workpiece to the plasma; meanwhile, conductive grounding terminals on the underside of the shadow mask electrically connect the grounding pads of the workpiece with carrier electrodes on the workpiece carrier, to ground the workpiece.