Light-Transmitting Pressing Plate for Integrated Laser Chip Transfer
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Solution Overview
Problem
Current mass transfer technologies for micrometer-scale light-emitting chips face challenges in transfer yield, precision, and speed due to complex processes involving multiple chambers, leading to reduced production efficiency.
Innovation Solution
A heating and pressurizing device that integrates heating, pressurization, and laser irradiation functions, using a light-transmitting pressing plate to transmit a laser wavelength for precise transfer of chips between substrates, ensuring uniformity and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple chambers are used for heating, pressurization, and laser processing separately, then each function can be optimized independently, but the process complexity increases and production efficiency decreases
Solution Approach 1:
The patent combines heating, pressurization, and laser processing functions into a single integrated chamber. The pressing plate serves dual purposes: applying mechanical pressure to substrates while simultaneously transmitting laser energy for processing. This integration eliminates the need for multiple separate chambers and reduces process complexity while maintaining functional optimization.
Solution Approach 2:
The pressing plate is designed as a multi-functional component that performs both mechanical pressurization and optical transmission. By selecting materials with appropriate laser transmission characteristics, the same component enables both force application and laser processing within one chamber, improving efficiency without increasing device complexity.
2Productivity
If a light-transmitting pressing plate is used to transmit laser, then laser irradiation can be applied during pressurization, but the material selection and design become more complex
Solution Approach 1:
The patent addresses material selection complexity by specifying appropriate refractive index ranges for the pressing plate material. By controlling the refractive index parameter within specific bounds, the system achieves effective laser transmission while maintaining manufacturability. This parameter-based approach simplifies material selection compared to exploring unlimited material options.
Solution Approach 2:
The pressing plate is designed with differentiated regions: a light-transmitting region with specific optical properties for laser passage, and a peripheral region for mechanical support and sealing. This local quality differentiation allows the plate to satisfy both optical transmission requirements and mechanical pressurization functions, while keeping material selection manageable through regional specialization.
3Strength
If the pressing plate thickness is increased to improve pressure bearing capacity, then structural strength increases, but laser transmission uniformity deteriorates
Solution Approach 1:
The patent resolves the thickness contradiction by optimizing the refractive index parameter of the pressing plate material. By selecting materials with refractive indices within specific ranges, the system achieves effective laser transmission even through thicker plates, thereby maintaining both pressure bearing capacity and transmission uniformity through parameter optimization rather than simply increasing or decreasing thickness.
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
Simplifies the mass transfer process by integrating heating, pressurization, and laser irradiation, improving production efficiency and ensuring high transfer yield and precision.
Implementation Method 1
The light-transmitting pressing plate allows a laser of a target wavelength to be transmitted in a first direction from the first surface to the second surface
Implementation Method 2
a refractive index of the light-transmitting pressing plate for a laser with a wavelength of 355 nm is greater than 1 and less than 1.6
Data Source
AI summary
A light-transmitting pressing plate comprises a first surface and a second surface in parallel to each other, and the light-transmitting pressing plate allows a laser of a target wavelength to be transmitted in a first direction from the first surface to the second surface. Under the action of pressure and the laser of the target wavelength, the light-transmitting pressing plate is used for transferring light-emitting chips on a first substrate to a second substrate, the first substrate being located on one side close to the second surface of the light-transmitting pressing plate and allowing the laser of the target wavelength to be transmitted in the first direction, and the first substrate being closer to the light-transmitting pressing plate than the second substrate. In the present disclosure, the light-transmitting pressing plate provides a basis for pressurizing and laser irradiation, thus achieving the feasibility of mass transfer of light-emitting chips.