Optical Scanner Wiring Protection Against Mask Contact

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Solution Overview

Problem

Existing optical scanner technologies face issues with contact between wiring lines and masks during deposition, leading to potential breaks or increased electrical resistance, which affects the reliability of the scanner.

Innovation Solution

A member for an optical scanner is designed with a structure thicker than the wiring line on its surface, preventing contact between the mask and the wiring line during deposition, and allowing for higher precision and stability in forming the light reflective portion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If a mask is disposed on the first surface to define the deposition area, then the light reflective portion can be formed with higher precision, but the mask may come in contact with the wiring line and cause breaks or increased electrical resistance

Engineering Contradiction:

Improvedeposition area definition precisionVSAvoidwiring line reliability

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

A support structure is introduced as an intermediary element between the mask and the wiring line. The mask is supported by this structure at a position closer to the light reflective portion than the wiring line, preventing direct contact between the mask and wiring line while maintaining precise deposition area definition.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The problem is resolved by transitioning from a two-dimensional planar arrangement to a three-dimensional spatial arrangement. The support structure creates vertical separation, positioning the mask in a different spatial dimension relative to the wiring line, thereby preventing contact while maintaining horizontal precision.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Manufacturing precision

If the mask is positioned closer to the wiring line for precise deposition, then the light reflective portion can be formed with higher precision, but the wiring line may be damaged by mask contact

Engineering Contradiction:

Improvelight reflective portion deposition precisionVSAvoidmask contact damage to wiring line

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The support structure serves as a mediator that enables the mask to be positioned close to the light reflective portion for precise deposition while preventing harmful contact with the wiring line. The support structure absorbs the potential harmful interaction.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The support structure provides beforehand cushioning by being positioned between the mask and wiring line prior to the deposition process. This pre-positioned protective element prevents harmful contact before it can occur during mask placement or deposition.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If the wiring line is made thicker to prevent breakage, then the wiring line reliability improves, but the space available for other components decreases

Engineering Contradiction:

Improvewiring line reliabilityVSAvoidavailable space on movable portion

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The support structure acts as an intermediary protective element that allows the wiring line to remain thin while still preventing breakage. The support structure bears the mechanical load and protection function, enabling the wiring line to be optimized for electrical performance rather than mechanical strength.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This configuration enhances the reliability of the optical scanner by preventing adverse effects on the wiring lines, such as breaks or increased resistance, resulting in a more stable and efficient scanning mechanism.

Implementation Method 1

a structure thicker than the wiring line is provided... the contact between the mask that defines the deposition area and the wiring line can be inhibited

Methodology Applied

Scientific EffectPhysical barrier protection:

Implementation Method 2

The metal film is deposited by a vapor phase deposition method such as sputtering or evaporation

Methodology Applied

Scientific EffectVapor phase deposition: Physical Vapour Deposition

Implementation Method 3

The metal film is deposited by a vapor phase deposition method such as sputtering or evaporation

Methodology Applied

Scientific EffectSputtering: Sputtering

Data Source

PatentUS10330923B2Member for optical scanner, optical scanner, method of manufacturing optical scanner, image display device, and head-mounted display

Publication Date: 2019.06.25 SEIKO EPSON CORP

AI summary

A member for an optical scanner includes: a functional portion including a movable portion, a shaft portion oscillatably supporting the movable portion, and a support portion supporting the shaft portion; a wiring line provided on the movable portion; and a structure provided on the functional portion and thicker than the wiring line; the wiring line and the structure are provided on a first major surface of the functional portion.