Spatial Light Modulator Layout for Faster Pattern Exposure
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Solution Overview
Problem
Existing exposure apparatuses face challenges in efficiently exposing patterns onto photosensitive substrates due to limitations in spatial light modulation units, including inefficient data communication, increased spacing between elements, and inadequate cooling, which affect throughput and exposure time.
Innovation Solution
The spatial light modulation unit is designed with a controller arranged side by side with the spatial light modulator on a shared substrate, allowing for improved data communication speed and reduced spacing between elements, while a heat sink is positioned to cool the controller effectively, enhancing the throughput and reducing exposure time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the controller and spatial light modulator are integrated on a single substrate with the controller arranged side by side in the scan direction, then data communication speed is enhanced and pixel density is increased, but the device complexity increases
Solution Approach 1:
The controller and spatial light modulator are integrated on a single SLM substrate, merging two previously separate components into one unified device. This integration eliminates the need for external communication interfaces and wiring between separate components, thereby enhancing data communication speed while reducing overall system complexity despite the increased integration density.
Solution Approach 2:
The controller is arranged side by side with the spatial light modulator in the scan direction, utilizing the two-dimensional plane of the substrate more efficiently. This spatial arrangement in the scan direction allows for shorter communication paths and higher pixel density without significantly increasing the vertical profile or requiring additional layers.
2Productivity
If pixel density is increased by denser arrangement of spatial light modulators, then exposure throughput is improved, but heat generation increases requiring more effective cooling
Solution Approach 1:
A heat sink is introduced as an intermediary thermal management component, positioned to receive heat from the controller and spatial light modulator. This heat sink acts as a mediator between the heat-generating components and the surrounding environment, enabling higher pixel density and exposure throughput by effectively dissipating the increased heat load through its thermal conduction and convection capabilities.
3Area of stationary object
If the controller is provided on the rear side surface of the SLM substrate, then space utilization is optimized, but heat dissipation requirements increase
Solution Approach 1:
The heat sink serves as a thermal intermediary positioned adjacent to the controller on the rear side surface. It conducts heat away from the controller through direct thermal contact and dissipates it to the surrounding environment, enabling the controller to be placed on the rear side surface for optimized space utilization without compromising thermal management.
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 configuration increases the density of elements and improves the throughput by shortening exposure time per sheet, enabling faster and more efficient pattern exposure on photosensitive substrates.
Implementation Method 1
a heat sink, wherein the spatial light modulator is provided on a front side surface of the SLM substrate, the controller is provided on a rear side surface of the SLM substrate, and the heat sink is in contact with the controller
Data Source
AI summary
A spatial light modulation unit is used in an exposure apparatus that exposes an exposure pattern onto a photosensitive substrate while moving the photosensitive substrate in a scan direction. The spatial light modulation unit includes: a spatial light modulator having a plurality of elements; a controller that controls the plurality of elements in accordance with the exposure pattern; and a SLM substrate on which the spatial light modulator and the controller are provided. The controller is arranged side by side in the scan direction with respect to the spatial light modulator.