Light-Emitting Device Base with Depressed Portions for Laser Alignment
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Solution Overview
Problem
Conventional light-emitting devices face challenges in precise alignment of semiconductor laser elements due to unclear outer shapes of packages, leading to decreased detection precision and mispositioning, and varying positioning precision when incorporated into modules due to inclined lateral surfaces.
Innovation Solution
A light-emitting device design featuring a base with upwardly opening depressed portions for precise alignment of semiconductor laser elements, where the elements are mounted based on a predetermined point on a line connecting these depressed portions, and a method for manufacturing a laser module that uses positioning members to align and clamp the device for improved positioning precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If image recognition is used to detect package centers based on outer shapes, then automated positioning is enabled, but detection precision decreases when outer shapes are unclear
Solution Approach 1:
The patent introduces depressed portions as intermediary positioning features on the base. These depressed portions serve as mediators between the package and the mounting system, providing clear geometric references that can be reliably detected by image recognition systems. The depressed portions are specifically designed with shapes and positions that enhance detectability compared to package outer shapes, thus resolving the contradiction between automation and precision.
2Ease of operation
If positioning jigs contact lateral surfaces of packages, then positioning is simplified, but positioning precision varies when lateral surfaces are inclined
Solution Approach 1:
The patent transitions the positioning reference from the lateral dimension (inclined surfaces) to the planar dimension (depressed portions on the upper surface). By moving the positioning reference to a different spatial dimension where the base provides stable, flat reference features, the system achieves consistent positioning precision while maintaining operational simplicity. The depressed portions provide well-defined contact points that eliminate the variability caused by lateral surface inclination.
Data Source
AI summary
A method for manufacturing a light-emitting device includes: providing a base including a first depressed portion and a second depressed portion both upwardly opening; and positioning and mounting at least one semiconductor laser element on or above the base based on a predetermined point on a line connecting the first depressed portion and the second depressed portion in a plan view.