Optical Module Wiring Resistance Equalization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical modules face challenges in maintaining consistent power supply to optical ICs due to variations in wiring line lengths, leading to potential malfunctions.
Innovation Solution
The optical module incorporates a module substrate with wiring lines that adjust their cross-sectional areas based on length to equalize resistance values, ensuring consistent power delivery to optical ICs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If wiring lines of different lengths are used to connect power supply IC to multiple optical ICs, then the module can accommodate more optical ICs and achieve compact design, but the resistance values of wiring lines vary causing voltage and current variations that may lead to malfunctions
Solution Approach 1:
The patent applies local quality by making the cross-sectional area of wiring lines vary locally according to their lengths. Specifically, wiring lines with larger lengths have larger cross-sectional areas to compensate for the increased resistance. This localized adjustment ensures that all optical ICs receive substantially equal power despite the different path lengths from the power supply IC, thereby maintaining reliability while enabling compact module design.
2Reliability
If wiring line cross-sectional area is increased to reduce resistance, then power delivery consistency improves, but the wiring line occupies more space and manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by systematically varying the cross-sectional area parameter of wiring lines based on their lengths. The cross-sectional area is calculated using the formula S = k × L, where S is the cross-sectional area, L is the wiring line length, and k is a proportionality constant. This mathematical relationship provides a precise and controllable method to adjust wiring line properties, achieving consistent power delivery while managing manufacturing complexity through a clear design rule.
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 configuration reduces variations in voltage and current supplied to optical ICs, minimizing the likelihood of malfunctions and allowing for a more compact module design.
Implementation Method 1
The first optical IC 7A and the second optical IC 7B perform photoelectric conversion
Data Source
AI summary
In an optical module, a power supply IC is configured to supply power to a first optical IC and a second optical IC. The first and second optical ICs are configured to perform photoelectric conversion. In the module substrate, a first wiring line connects the power supply IC to the first optical IC, and a second wiring line connects the power supply IC to the second optical IC. The resistance value of the first wiring line is R1, the resistance value of the second wiring line is R2, the shortest path length from the power supply IC to the first optical IC within the first wiring line is L1, and the shortest path length from the power supply IC to the second optical IC within the second wiring line is L2. Here, L2 is longer than L1 and |R2−R1| is smaller than (L2−L1)/L1×R1.