Elastic Pressing Part for Solder-Free RF Substrate Connection

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Solution Overview

Problem

Existing signal connection methods between substrate members require a soldering process, which increases manufacturing cost and assembly time, and fail to maintain RF characteristics and signal quality under external vibrations.

Innovation Solution

An assistant elastic part with an elastic rib that applies an elastic force to maintain electrical connection between substrate members, eliminating the need for soldering and ensuring RF characteristics and signal quality through optimal isolation and return loss values.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a soldering process is used to connect substrate members, then electrical signal connection is achieved, but manufacturing cost increases and assembly time increases

Engineering Contradiction:

Improveelectrical signal connectionVSAvoidassembly time

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent replaces the traditional mechanical soldering process with an elastic pressing mechanism. The elastic pressing part applies continuous elastic force to maintain electrical contact between conductive patterns on substrate members, eliminating the need for soldering while reducing assembly time and cost.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the connection mechanism from permanent chemical bonding (soldering) to dynamic mechanical pressing. By using elastic materials with specific force characteristics, the system achieves reliable electrical connection through controllable elastic force rather than thermal/chemical processes.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If a soldering process is used to connect substrate members, then electrical signal connection is achieved, but manufacturing cost increases

Engineering Contradiction:

Improveelectrical signal connectionVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces the expensive soldering process with a simpler elastic pressing mechanism. The elastic pressing part can be manufactured from inexpensive elastic materials and eliminates the need for soldering equipment, flux, and post-soldering inspection processes, significantly reducing manufacturing cost.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The elastic pressing part functions as a disposable or replaceable component that provides sufficient connection force during the product's operational life. This approach avoids the need for expensive, permanent solder joints while maintaining adequate electrical connection reliability.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Volume of moving object

If substrate members are connected without separation distance, then space is saved, but signal quality deteriorates under external vibrations

Engineering Contradiction:

Improvespace utilizationVSAvoidsignal quality

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The patent introduces dynamic elastic pressing that maintains optimal contact pressure between substrate members during operation. The elastic material compensates for vibrations and external forces by adjusting the pressing force, ensuring stable electrical connection and signal quality without requiring separation distance.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The elastic pressing part acts as a cushioning mechanism that anticipates and compensates for vibrations and external forces. By maintaining consistent contact pressure through the elastic material's inherent damping characteristics, the system protects signal quality from vibration-induced degradation while keeping substrates in close proximity.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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

Reduces manufacturing costs by eliminating soldering, maintains RF characteristics, and improves signal quality by securing desired isolation and return loss values, enabling automated assembly.

Implementation Method 1

an elastic rib that is provided to press the second substrate member by an elastic force of a material of the elastic rib

Methodology Applied

Scientific EffectElastic force: Elasticity

Data Source

PatentUS20260013043A1Assistant elastic part for signal connection and substrate assembly including same

Publication Date: 2026.01.08 KMW INC

AI summary

Provided are an assistant elastic part for signal connection and a substrate assembly including the same. The assistant elastic part for signal connection includes an elastic pressing part that, of a substrate assembly including a first substrate member and a second substrate member that is stacked so that one surface thereof is in surface-contact with the first substrate member, applies an elastic force to the second substrate member and maintains electrical signal connection between mutually facing surfaces of the first substrate member and the second substrate member, and the elastic pressing part includes an elastic rib that is provided to press the second substrate member by an elastic force of a material of the elastic rib, thereby reducing the product manufacturing cost and providing the advantage of maintaining RF characteristics with only low-cost components.