Laser Processing Device Dynamic Condensing Shape Control
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Solution Overview
Problem
The existing laser dicing devices face challenges in adjusting the condensing shape of laser light, which affects processing results, particularly due to the influence of laser traveling direction, and lack sufficient margin for adjustment when maintaining a constant condensing shape for both directions.
Innovation Solution
A laser processing device equipped with a spatial light modulator and a control unit that adjusts the modulation pattern based on the traveling direction of the condensing point, allowing for individual adjustments to achieve desired processing results by modifying the condensing shape into arc shapes protruding in specific directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the condensing shape is maintained constant for both laser traveling directions, then the device complexity is reduced, but the manufacturing precision deteriorates due to insufficient adjustment margin
Solution Approach 1:
The patent implements dynamic adjustment of the condensing shape by controlling the spatial light modulator to display different modulation patterns based on the laser traveling direction. The control unit automatically switches between first and second modulation patterns corresponding to first and second traveling directions, enabling the condensing shape to adapt dynamically to processing requirements without increasing device complexity
Solution Approach 2:
The patent changes the modulation pattern parameters displayed on the spatial light modulator according to the laser traveling direction. By adjusting the modulation pattern from a first pattern to a second pattern, the condensing shape parameters are modified to achieve optimal processing results for different traveling directions while maintaining a simple device structure
2Manufacturing precision
If the modulation pattern is adjusted individually for different traveling directions, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The spatial light modulator serves multiple functions by displaying different modulation patterns for different laser traveling directions. This single component handles both first and second modulation patterns, providing universal control for various processing scenarios without requiring additional complex control mechanisms
Solution Approach 2:
The control unit receives information about the laser traveling direction and automatically selects the appropriate modulation pattern to display on the spatial light modulator. This feedback mechanism ensures that the correct condensing shape is applied for each traveling direction, improving manufacturing precision while keeping the control system straightforward
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 solution enables the laser processing device to effectively control the extension amount of fractures by adjusting the condensing shape according to the laser traveling direction, enhancing processing results and providing a larger margin for adjustment.
Implementation Method 1
a spatial light modulator configured to display a modulation pattern for modulating the laser light output from the light source
Implementation Method 2
a condenser lens configured to condense the laser light modulated by the spatial light modulator, on an object
Data Source
AI summary
A laser processing device comprising: a light source configured to output laser light; a spatial light modulator configured to display a modulation pattern for modulating the laser light output from the light source; a condenser lens configured to condense the laser light modulated by the spatial light modulator, on an object; and a control unit configured to control the spatial light modulator to adjust the modulation pattern in accordance with a traveling direction of a condensing point of the laser light with respect to the object.