Flexible Substrate With Asymmetric Openings For Narrow Pitch Wiring

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Solution Overview

Problem

Flexible substrates with narrower-pitched wirings and high-density electrical elements face challenges in maintaining flexibility and expansion/contraction characteristics while preventing damage from bending or force-induced stress, as existing designs often rely on honeycomb-shaped openings or meandering wirings that may not adequately support these requirements.

Innovation Solution

A flexible substrate design featuring a flexible insulating base with differently shaped openings and line portions, where the first and second openings are defined by overlapping line portions, allowing for a wave-like arrangement of scan and signal lines, and an island part supporting electrical elements, which enhances flexibility and expansion/contraction characteristics while enabling high-density electrical element placement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If honeycomb-shaped openings or meandering wirings are used to prevent wiring damage, then flexibility and expansion/contraction characteristics are improved, but wiring pitch cannot be narrowed and electrical element density remains low

Engineering Contradiction:

Improveflexibility and expansion/contraction characteristicsVSAvoidelectrical element density

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The insulating base is segmented into multiple openings with different shapes (first openings and second openings) arranged in a specific pattern. This segmentation allows the structure to accommodate both flexibility requirements and higher wiring density by creating distinct zones for different functions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs asymmetric opening shapes where first openings and second openings have different geometries. This asymmetry enables optimized space utilization and allows wirings to be arranged with narrower pitch while maintaining the necessary flexibility and expansion/contraction characteristics.

Inventive Principle:

Principle #4Asymmetry

2Quantity of substance

If narrower-pitched wirings and high-density electrical elements are implemented, then electrical element density is improved, but flexibility and expansion/contraction characteristics deteriorate

Engineering Contradiction:

Improveelectrical element densityVSAvoidflexibility and expansion/contraction characteristics

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

By dividing the insulating base into multiple regions with different opening shapes, the patent creates a structure that can support high-density wirings in certain areas while maintaining flexibility through the overall patterned structure. The segmented design allows localized optimization for density while preserving global flexibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the insulating base have different opening shapes tailored to local requirements. Areas requiring higher flexibility have openings optimized for that function, while areas requiring higher density have openings optimized for space utilization, achieving both goals simultaneously through local optimization.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If openings are provided in the insulating base to enhance flexibility, then expansion/contriction characteristics are improved, but wiring density and pitch are limited

Engineering Contradiction:

Improveexpansion/contraction characteristicsVSAvoidwiring pitch

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The use of asymmetric opening shapes allows for more efficient space utilization compared to uniform honeycomb structures. This enables wirings to be placed closer together (narrower pitch) while the opening pattern still provides sufficient flexibility and expansion/contraction characteristics.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The insulating base is divided into multiple openings with different shapes rather than using a single uniform pattern. This segmentation allows for optimized wiring routing around different opening types, achieving narrower pitch and higher manufacturing precision while maintaining the necessary mechanical flexibility.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11557739B2Flexible substrate

Publication Date: 2023.01.17 MAGNOLIA WHITE CORP

AI summary

According to an embodiment, a flexible substrate includes a flexible insulating base and a plurality of wirings on the insulating base. Furthermore, the insulating base includes a first opening, a second opening shape of which is different from that of the first opening, and a first line portion. The first line portion is disposed between the first opening and the second opening.