Printed Wiring Board Conductor Layout for Stress Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing printed wiring boards face issues with signal wiring and power supply conductor design, where stress transmission can lead to increased risk of signal wiring breakage due to the power supply conductor bending along the signal wiring, resulting in potential short circuits and transmission loss.
Innovation Solution
A printed wiring board design featuring a conductor layer with specific opening parts and wiring configurations, including first and second openings, and first and second wirings that extend and bend in a way to increase distance between them, reducing stress transmission and impedance mismatch, while maintaining symmetry and parallel extensions to prevent breakage and ensure matched impedance values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply conductor is designed as a solid layer with opening parts, then the structure provides good electrical connection and power supply, but the signal wiring conductor is prone to breakage due to stress transmission when it bends along the power supply conductor
Solution Approach 1:
A resin insulating layer is introduced as an intermediary between the signal wiring conductor and the power supply conductor. This resin layer acts as a stress isolation medium, preventing stress transmitted from the bending power supply conductor from reaching the signal wiring conductor, thereby eliminating the harmful stress transmission while maintaining electrical connectivity through the opening parts in the power supply conductor.
2Area of stationary object
If the signal wiring conductor is placed adjacent to the power supply conductor, then the layout is compact and space-efficient, but impedance mismatch occurs leading to transmission loss
Solution Approach 1:
The resin insulating layer is selectively applied in specific regions between the signal wiring conductor and power supply conductor. This local quality approach allows the resin to provide impedance control and electrical isolation exactly where needed, preventing transmission loss in critical areas while maintaining compact layout and efficient space utilization on the printed wiring board.
Data Source
AI summary
A printed wiring board includes an insulating layer, and a conductor layer including a solid layer and wirings. The solid layer has an opening part. The wirings are formed in the opening part. The opening part includes first and second opening parts. The wirings include first and second wirings. The first wiring has a first land, a first portion, and a second portion. The second wiring has a second land, a third portion, and a fourth portion extending in parallel to the second portion. A first boundary between the first and second portions is in the second opening part. The first portion is bending at the first boundary and increasing distance between the first and second wirings. A second boundary between the third and fourth portions is in the second opening part. The third portion is bending at the second boundary and increasing distance between the first and second wirings.