Microfabricated Thermal Platform With Insulated Multi-Site Heating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thermal platforms for chemical and biological reactions require improved thermal accuracy and are inefficient in terms of power consumption.
Innovation Solution
A microfabricated thermal platform using a thermally-insulating organic polymer layer, such as polyimide or SU8, with integrated heating and temperature sensing elements, allowing precise temperature control through a closed-loop mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional heating arrangements are used in thermal platforms, then temperature control is achieved, but thermal accuracy is insufficient and power consumption is high
Solution Approach 1:
The heating arrangement is divided into multiple discrete heating zones or elements that can be independently controlled. This segmentation allows selective heating of specific regions, improving thermal accuracy by avoiding unnecessary heating of entire platforms, thereby reducing overall power consumption while maintaining precise temperature control where needed.
Solution Approach 2:
Temperature sensors are integrated into the thermal platform to provide real-time feedback on actual temperature at heating zones. This feedback mechanism enables closed-loop control where the heating elements can be precisely adjusted based on measured temperature deviations, achieving high thermal accuracy while minimizing energy consumption by applying heat only when and where necessary.
2Productivity
If multiple thermal sites are integrated on a single platform, then productivity increases, but thermal insulation between sites deteriorates
Solution Approach 1:
The platform is segmented into multiple spatially separated heating zones with thermal sites distributed across the substrate. Each zone is independently controllable and thermally isolated through strategic placement of thermally-insulating materials between zones, enabling simultaneous operation of multiple sites without significant thermal interference while maintaining high productivity.
Solution Approach 2:
Thermally-insulating materials are introduced as intermediary elements between adjacent thermal sites and heating zones. These insulating layers act as thermal barriers that prevent heat leakage between sites, allowing multiple thermal sites to operate in close proximity on a single platform without compromising thermal insulation performance, thus maintaining both productivity and energy efficiency.
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 platform achieves precise temperature control with reduced power consumption and enhances thermal stability, enabling efficient temperature control for chemical and biological reactions.
Implementation Method 1
a thermally-insulating layer, formed from an organic polymer, having a predefined thermal conductivity, the thermally-insulating layer configured to provide thermal insulation between the fluid or other material positioned over the thermal platform, and a substrate positioned beneath the thermal platform
Implementation Method 2
an electrically-conductive layer, formed on or adjacent an upper surface of the thermally-insulative layer, the electrically-conductive layer patterned to define at least one heating element
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C~2D
AI summary
The present disclosure relates to a microfabricated thermal platform. The platform is formed over a substrate, which may for example be a silicon wafer, and which may form part of the platform. The substrate is coated in a thermally-insulating material, which may be an organic polymer such, as polyimide or SU8. The thermally-insulating material may have a predetermined thermal conductivity, which is dependent on thickness, geometry and processing. The surface of the thermally-insulating material may include an arrangement of thermal sites, with each site having a reaction plate (or thermal plate) over which chemical reactions may occur. A heating element may be positioned beneath each reaction plate. The thermal platform may have a plurality of such thermal sites arranged over the upper surface of the thermally-insulating material. However, it will be appreciated that in practice, there could be a single thermal site. In use, the thermal platform may have a fluidic medium, such as a liquid or a gas, disposed over the thermal sites. One application for the thermal platform is in chemical and biological reactions. In such reactions, the fluidic medium may be an aqueous solution which comprises reagents for those reactions. The fluidic medium may be an ionically conducting fluid, organic solution or a gas. Precise temperature control enables the correct reactions to occur.