Mask Unit for UV Transfer Apparatus Alignment
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Solution Overview
Problem
Conventional transfer methods for ultraviolet curable resins struggle with accurately transferring patterns onto substrates due to inconsistencies in mold alignment and irradiation, leading to defective products with misaligned or incomplete patterns.
Innovation Solution
A transfer method and apparatus that utilize a mask unit with electromagnetic-wave transmitting parts to precisely position and irradiate ultraviolet rays onto the substrate, ensuring accurate transfer of patterns by aligning the mask unit's transmitting parts with the mold's pattern, and using a dancer roller system to maintain mold tension and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional transfer method without mask unit is used, then the device complexity is low, but the manufacturing precision of pattern transfer is poor
Solution Approach 1:
A mask unit is introduced as an intermediary component between the ultraviolet irradiation source and the mold. This mask unit includes a mask body with electromagnetic-wave transmitting parts that selectively allow ultraviolet rays to pass through, enabling precise control over which areas of the mold receive irradiation. The mask unit mediates the interaction between the irradiation source and the mold, ensuring accurate pattern transfer by controlling the spatial distribution of ultraviolet energy.
Solution Approach 2:
The mask unit is designed with non-uniform electromagnetic-wave transmitting parts that have different transmission characteristics in different regions. The mask body includes specific patterns of transmitting and non-transmitting areas that correspond to the desired transfer pattern. This local differentiation of transmission properties allows selective irradiation of specific mold regions, achieving high precision pattern transfer.
2Manufacturing precision
If mask unit is added to improve alignment precision, then the manufacturing precision improves, but the device complexity increases
Solution Approach 1:
The mask unit is integrated with the mold assembly, combining the mask body with electromagnetic-wave transmitting parts into a single functional unit that works together with the mold. This merging reduces the number of separate components and simplifies the overall apparatus structure while maintaining the alignment precision benefits. The integrated design allows the mask unit to be positioned and aligned simultaneously with the mold, reducing cumulative alignment errors.
Solution Approach 2:
The mask unit is pre-positioned and pre-aligned with the mold before the ultraviolet irradiation process begins. The mask body with its electromagnetic-wave transmitting parts is arranged in advance to match the desired transfer pattern, ensuring that alignment precision is established before the critical irradiation step. This preliminary positioning eliminates the need for complex real-time alignment adjustments during irradiation.
3Manufacturing precision
If conventional irradiation method is used, then the process is simple, but the pattern transfer is incomplete or misaligned
Solution Approach 1:
The mask unit serves as an intermediary that controls and shapes the ultraviolet irradiation pattern. By positioning the mask body with specific electromagnetic-wave transmitting parts over the mold, it mediates the irradiation process to ensure that ultraviolet rays reach only the intended areas of the mold. This intermediary control prevents misalignment and incomplete transfer by physically constraining the irradiation spatial distribution.
Solution Approach 2:
The mask body incorporates locally differentiated electromagnetic-wave transmitting parts that correspond to the desired transfer pattern. Different regions of the mask body have different transmission characteristics, allowing selective irradiation of specific mold areas. This local quality differentiation ensures complete and accurate pattern transfer by matching the irradiation pattern precisely with the mold's transfer pattern.
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 ensures accurate and complete pattern transfer onto the substrate, reducing defects by maintaining precise alignment and consistent irradiation, resulting in high-quality products with improved yield and reduced residual material.
Implementation Method 1
irradiate ultraviolet ray to cure the ultraviolet curable resin
Data Source
AI summary
According to one embodiment, under a condition that a substrate is installed on a substrate installation unit, a mold is installed on a mold installation unit, and a mask unit is installed in a mask-unit installation unit, a transfer apparatus controls an operation of a mold presser unit so as to press the mold against the substrate, the operation of a first positioning unit so as to position the mask unit with respect to the mold and the operation of an irradiation unit so as to irradiate an uncured material provided on the surface of the substrate with electromagnetic waves of a predetermined wavelength.