Multi-Laser Chip Layout for Yield and Cleaving Strength
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Solution Overview
Problem
Existing semiconductor laser chips have non-optimized production yields due to the use of single laser units, resulting in wasted surface area and increased production costs, particularly in broadband sensors that require multiple laser units.
Innovation Solution
The design of a semiconductor laser chip with multiple laser units distributed across a substrate, where the width is less than or equal to four times the thickness, optimizing the substrate's surface area utilization and minimizing material waste during cleaving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single laser unit is used on the substrate, then the manufacturing process is simple, but the production yield is low and surface area is wasted
Solution Approach 1:
The substrate is divided into multiple functional zones, each containing a laser unit with specific parameters (wavelength, power). Instead of a single laser unit, the substrate hosts multiple segmented laser units that can be independently activated, thereby increasing production yield and utilizing the surface area more effectively.
Solution Approach 2:
The substrate is designed to support multiple laser units with different functional characteristics (different wavelengths for detecting different gases, different powers for various detection ranges). This multi-functionality allows a single substrate to serve multiple detection purposes, improving both production yield and surface area utilization.
2Adaptability or versatility
If multiple laser units are placed on a large substrate, then the detection capability is enhanced, but the material cost increases
Solution Approach 1:
Multiple laser units with different detection capabilities are merged onto a single substrate, sharing common infrastructure such as mounting structures, electrical connections, and control circuits. This combining approach enhances detection capability while reducing material usage compared to using separate substrates for each laser unit.
Solution Approach 2:
The substrate utilizes its surface area in multiple dimensions by arranging laser units in optimized spatial configurations. Rather than simply increasing substrate size linearly, the invention employs two-dimensional spatial arrangement to maximize the number of laser units per unit area, thereby enhancing detection capability without proportionally increasing material usage.
3Productivity
If the substrate width is increased to accommodate more laser units, then the production efficiency improves, but the mechanical strength during cleaving decreases
Solution Approach 1:
The substrate dimensions are optimized by adjusting the width-to-thickness ratio parameter. Instead of simply increasing width, the invention modifies the dimensional parameters to maintain mechanical strength during cleaving while still accommodating multiple laser units. The width is set to be between 2 to 4 times the thickness, which balances production efficiency with mechanical integrity during the cleaving process.
Data Source
AI summary
Semiconductor laser chip (101) comprisingA substrate (105) comprising:two lateral faces (107),an lower face (109),an upper face (108),at least two semiconductor lasers (102), these two lasers (102) being distributed between said two lateral faces (102) with a spacing (E) between two adjacent lasers (102),said substrate (101) having a width (I), this width being the distance between said two lateral faces (107) of the substrate (105), and a thickness (e), this thickness (e) being the distance measured between the lower face (109) and the upper face (108) of the substrate (105) perpendicular to the width (I), said width (I) being less than or equal to 4 times the thickness (e).