Segmented Heater Strip Control for Precise Functional Material Deposition
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Solution Overview
Problem
Existing deposition technologies struggle to accurately and predictably transfer highly viscous functional materials, such as conductive polymers, onto substrates while maintaining precise aspect ratios and form definitions, and there is a need for scalable deposition processes adaptable to various applications.
Innovation Solution
A deposition system with a heater strip comprising serially arranged resistive heating elements, a power supply, a selection module, a voltage and current sensing facility, and a control unit, allowing independent control of heat flux through precise voltage and current sensing, enabling uniform current distribution and scalable deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If heat induced deposition is used to transfer functional materials, then deposition of highly viscous materials is enabled, but control over heat flux and deposition precision deteriorates
Solution Approach 1:
The heater strip is divided into multiple independently controllable heating zones, each with separate power supply control. This segmentation enables precise localization of heat flux to specific deposition areas, allowing accurate control of aspect ratios and form definitions for transferred functional materials while maintaining the ability to deposit highly viscous materials.
2Ease of operation
If conventional heater control is used, then heating capability is provided, but independent control of multiple heating zones increases device complexity
Solution Approach 1:
Multiple heating zones share common electrical connection points along the heater strip length, merging the connection infrastructure while maintaining independent power supply control for each zone. This reduces the number of discrete electrical connections compared to fully independent heaters, simplifying the device structure while preserving independent heat flux control capability.
3Adaptability or versatility
If deposition process is made adaptable to various applications, then versatility is improved, but process predictability and control may deteriorate
Solution Approach 1:
The system dynamically adjusts heat flux parameters (power, duration, distribution across zones) based on the specific deposition requirements of different functional materials and applications. This dynamic adaptability, combined with real-time monitoring and control, maintains deposition predictability and reliability across various applications by optimizing parameters for each specific case rather than using fixed settings.
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 system achieves precise and predictable deposition of functional materials with controlled heat flux, maintaining aspect ratios and form definitions, and is adaptable to different applications, ensuring efficient transfer of donor elements onto target surfaces.
Implementation Method 1
The heater strip has a plurality of serially arranged resistive heating elements for heating respective zones of the donor surface, which heating elements have a temperature dependent resistance
Implementation Method 2
the generated heat serves to evaporate a deposition agent so as to induce a vapor pressure that propels a donor element from the donor surface to the target surface
Data Source
Figure 1
Figure 2~2A
Figure 3~3A
AI summary
A deposition system (1) is disclosed herein for heat induced deposition of a donor element (d1, d2, ...,d6) from a donor surface (2s) onto a target surface (Ts). The deposition system comprises at least one heater strip (2), a power supply (3), a selection module (4), a voltage and current sensing facility (6) and a control unit (5). The at least one heater strip (2) comprises a plurality of serially arranged resistive heating elements (h1, h2, ...) for heating respective zones (2s1, 2s2,...) of the donor surface (2s), the resistive heating elements having a temperature dependent resistance. The selection module (4) is configured to alternately supply an electric power from the power supply (3) to a selected one of the serially arranged resistive heating elements. The voltage and current sensing facility (6) is configured to provide sense signals indicative for a voltage and a current of the supplied electric power and the control unit (5) is configured to control a heat flux of each resistive heating element in response to the sense signals.