Inkjet Printer Gas Cushion Substrate Thermal Control
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Solution Overview
Problem
Inkjet printing processes face challenges with substrate temperature fluctuations, leading to dimensional changes that result in printing faults due to the precision required in depositing small droplets onto large substrates, where temperature variations cause imprecision in droplet location.
Innovation Solution
An inkjet printer system incorporating a gas cushion substrate support with a thermal control system, including a heat exchanger and temperature sensors, to maintain precise temperature control of the substrate, using a gas conduit network and thermal medium to stabilize the substrate's temperature and reduce dimensional changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If strict temperature control of large substrates is implemented during inkjet printing, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The substrate support is divided into multiple independently controllable temperature zones, each with its own heating element and temperature sensor. This segmentation allows localized temperature control without requiring a complete system redesign, thereby improving manufacturing precision in specific areas while keeping overall device complexity manageable.
Solution Approach 2:
A thermal field uniformity adjustment mechanism is introduced as an intermediary between the heating elements and the substrate. This intermediary component actively compensates for temperature non-uniformities across the substrate surface, improving droplet placement precision without requiring direct modification of the entire temperature control system.
2Manufacturing precision
If temperature control systems are added to maintain substrate temperature, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The temperature control functions are merged into the existing substrate support structure. Heating elements are integrated directly into the support platform, and temperature sensors are embedded within the same structure, eliminating the need for separate external control systems and reducing overall device complexity while maintaining manufacturing precision.
Solution Approach 2:
The system dynamically adjusts temperature control parameters based on real-time substrate temperature measurements. By changing operational parameters (heating power, cooling rate) rather than physical structure, the system maintains substrate dimensional stability without requiring complex mechanical modifications.
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 effectively stabilizes the substrate's temperature, minimizing dimensional changes and improving the precision of inkjet printing by maintaining the target locations for droplet deposition, thus reducing printing faults and enhancing the accuracy of the process.
Implementation Method 1
a thermal control unit comprising a heat exchanger thermally coupled to at least the first gas conduit
Implementation Method 2
a gas cushion substrate support having a metal support surface
Data Source
AI summary
An inkjet printer is described. The inkjet printer has a gas cushion substrate support having a metal support surface; a print assembly with a dispenser having ejection nozzles facing the support surface; a gas source fluidly coupled to the gas cushion substrate support by a gas conduit; and a thermal control system coupled to the gas conduit.