Transmission Line Joint Strength via Electrode Pad Configuration

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Solution Overview

Problem

The joining of transmission lines often results in stress at the joint portions, leading to potential peeling or disconnection, complicating manufacturing process management and restricting usage environments.

Innovation Solution

A transmission line device configuration with electrode pads of varying sizes and shapes, strategically arranged and connected to enhance joint strength and shielding properties, including L-shaped or U-shaped pads for reinforcement, and interlayer connection conductors for improved rigidity and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If transmission lines are joined to define one transmission line device, then the individual transmission lines can be simplified and manufacturing cost can be reduced, but stress is easily applied to the joint portion leading to peeling or disconnection

Engineering Contradiction:

Improvemanufacturing costVSAvoidjoint portion stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent combines multiple transmission lines into a single integrated device with shared insulating substrates and conductor patterns. The first and second transmission lines are formed on the same insulating substrates, sharing common ground conductor patterns and insulating layers, which reduces the total number of components and simplifies manufacturing while maintaining joint integrity through unified construction.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements a nested structure where conductor patterns are embedded within insulating substrates, and multiple transmission lines are nested within the same substrate assembly. The signal conductor patterns are surrounded by ground conductor patterns and insulating layers, creating a nested configuration that provides mechanical support and electrical shielding, thereby reducing stress concentration at joint portions.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of manufacture

If transmission lines are joined to define one transmission line device, then the individual transmission lines can be simplified, but manufacturing process management for limiting the stress becomes complicated

Engineering Contradiction:

Improvetransmission line simplificationVSAvoidmanufacturing process management

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent employs universal insulating substrates and ground conductor patterns that serve multiple transmission lines simultaneously. The same insulating substrate material and ground pattern design are used for both the first and second transmission lines, creating a standardized platform that simplifies manufacturing processes while reducing the complexity of stress management through consistent structural properties.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent uses homogeneous materials and uniform structural design for the insulating substrates and conductor patterns across both transmission lines. The first and second insulating substrates are made of the same material with consistent dielectric properties, and the ground conductor patterns follow identical design rules, ensuring uniform stress distribution and simplifying manufacturing process management.

Inventive Principle:

Principle #33Homogeneity

3Ease of manufacture

If transmission lines are joined to define one transmission line device, then the individual transmission lines can be simplified, but the usage environment is restricted

Engineering Contradiction:

Improvetransmission line simplificationVSAvoidusage environment

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent segments the transmission line device into distinct first and second transmission lines that can be independently designed and manufactured, then joined together. This segmentation allows each transmission line to be optimized for specific functions while maintaining overall device flexibility, enabling adaptation to various usage environments through modular assembly of the segmented transmission lines.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11489242B2Transmission line device comprising a plurality of substrates each having signal and ground conductor patterns thereon that are joined to each other

Publication Date: 2022.11.01 MURATA MFG CO LTD

AI summary

A transmission line device includes first and second transmission lines. The first transmission line includes a first electrode pad that is electrically connected to a first signal conductor pattern, and a second electrode pad and a third electrode pad that are portions of a first ground conductor pattern. The second transmission line includes a fourth electrode pad that is electrically connected to a second signal conductor pattern, and a fifth electrode pad and a sixth electrode pad that are portions of a second ground conductor pattern. The first electrode pad is between the second electrode pad and the third electrode pad, and the fourth electrode pad is between the fifth electrode pad and the sixth electrode pad. The second electrode pad and the third electrode pad are larger than the first electrode pad, and the fifth electrode pad and the sixth electrode pad are larger than the fourth electrode pad.