Transparent Alignment Marks for Electronic Device Modules

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Solution Overview

Problem

Existing alignment techniques for electronic device modules are not suitable for panels made of transparent conductive films, as they rely on opaque metal film alignment marks, which are not effective for transparent substrates like touch panels.

Innovation Solution

An electronic device module with a first substrate having a transparent alignment mark and a second substrate with opaque alignment marks, allowing alignment using transparent alignment marks on the panel substrate and opaque marks on the printed board, facilitated by illumination optics for improved visibility and accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If opaque metal film alignment marks are used for mounting, then alignment can be performed using conventional techniques, but the method is not suitable for panels made of transparent conductive film

Engineering Contradiction:

Improveadaptability to transparent conductive film panelsVSAvoidalignment mark visibility

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The alignment mark on the transparent conductive film panel is formed to have a different color or optical property than the transparent conductive film itself, enabling visual distinction and alignment. This allows the alignment mark to be visible against the transparent background while maintaining the panel's transparency characteristics.

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The optical parameters of the alignment mark are changed by forming it with a different material composition or thickness than the transparent conductive film, creating contrast that enables visibility for alignment purposes while maintaining overall panel transparency.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If both alignment marks are formed from transparent conductive film, then the panel transparency is maintained, but the alignment marks become invisible and alignment accuracy deteriorates

Engineering Contradiction:

Improvealignment accuracyVSAvoidalignment mark visibility

Core Design Contradiction:

Measurement precisionVSIllumination intensity

Solution Approach 1:

The alignment mark is given a distinct color or optical appearance different from the transparent conductive film background, making it visible under illumination while the rest of the panel remains transparent. This resolves the contradiction by providing visual contrast for accurate alignment.

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The alignment mark is formed using a composite structure or material combination that provides both transparency (to maintain panel characteristics) and visual contrast (for visibility and alignment accuracy).

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS9167695B2Electronic device module

Publication Date: 2015.10.20 MAGNOLIA WHITE CORP

AI summary

An electronic device module includes a first substrate having a first wiring layer and a first alignment mark, the first alignment mark being transparent in a visible region of the electromagnetic spectrum, and a second substrate facing a part of the first substrate and having a second wiring layer and a second alignment mark facing the first alignment mark.