Substrate Structure With Shielded Through Holes For Signal Routing

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Solution Overview

Problem

In endoscopes, the compact relay substrate configuration requires efficient placement of signal wires between closely spaced substrates, necessitating skilled techniques to prevent electrical contact and interference while maintaining high-density mounting and electromagnetic shielding.

Innovation Solution

A substrate structure with a first substrate, a second substrate, a substrate spacing holding member, a mounted signal wire projecting from the second substrate, and a through hole in the first substrate covered by a shielding member to prevent electrical interference and allow for precise signal wire placement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the spacing between substrates is reduced to achieve compact relay substrate configuration, then the substrate size is reduced, but it becomes difficult to dispose signal wires without electrical contact and interference

Engineering Contradiction:

Improvesubstrate sizeVSAvoidsignal wire disposal difficulty

Core Design Contradiction:

Volume of moving objectVSEase of manufacture

Solution Approach 1:

The space between substrates is segmented into distinct regions: a first region for signal wire passage and a second region for component mounting. This segmentation allows signal wires to be systematically routed through the first region while components are mounted in the second region, preventing electrical contact and interference even in reduced spacing configurations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A spacing holding member is introduced as an intermediary component between the first and second substrates. This member not only maintains the reduced spacing but also provides structured pathways (through holes) that guide and isolate signal wires, preventing direct contact between wires and substrates while enabling compact configuration.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Volume of moving object

If high-density mounting is implemented to reduce substrate spacing, then the relay substrate size is reduced, but electromagnetic shielding becomes more difficult to ensure

Engineering Contradiction:

Improverelay substrate sizeVSAvoidelectromagnetic interference

Core Design Contradiction:

Volume of moving objectVSObject-affected harmful factors

Solution Approach 1:

The substrate structure is segmented into distinct functional regions with through holes providing isolated pathways for signal wires. This segmentation creates electromagnetic isolation zones that prevent interference between adjacent signal wires and between wires and substrates, enabling high-density mounting while maintaining shielding effectiveness.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Electromagnetic shielding is applied locally at critical positions where signal wires pass through the substrates. The spacing holding member with through holes provides localized shielding structures at wire passage points, rather than requiring comprehensive shielding across the entire substrate surface, thus enabling compact design while maintaining necessary electromagnetic protection.

Inventive Principle:

Principle #3Local quality

3Productivity

If multiple signal wires are disposed in reduced space, then substrate integration is improved, but skilled techniques are required to prevent electrical contact

Engineering Contradiction:

Improvesubstrate integration efficiencyVSAvoidelectrical contact prevention

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The spacing holding member is pre-configured with through holes at specific positions before substrate assembly. This preliminary arrangement of wire pathways guides signal wires through predetermined safe routes, eliminating the need for complex skilled techniques during assembly while ensuring reliable electrical isolation is maintained throughout the compact structure.

Inventive Principle:

Principle #10Preliminary action

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 effectively prevents physical and electrical interference between signal wires and substrates, enabling high-density mounting and reduced substrate spacing while maintaining electromagnetic shielding, enhancing image quality and reducing signal cable diameters.

Implementation Method 1

a shielding member for electric shielding, the shielding member being provided on a back face side of the first substrate and covering an entirety or at least a part of an opening of the through hole

Methodology Applied

Scientific EffectElectromagnetic shielding: Faraday Cage

Data Source

PatentUS9060447B2Substrate structure

Publication Date: 2015.06.16 OLYMPUS CORPORATION(JP)

AI summary

A substrate structure includes: a first substrate; a second substrate including a front face disposed so as to face a front face of the first substrate, a substrate spacing holding member provided between the front faces of the substrates facing each other, and holds a spacing between the two substrates at a predetermined value; a mounted component including a signal wire mounted on the second substrate, the signal wire, including an end portion electrically connected to the second substrate and extending from the substrate to an outside along the front face of the second substrate; a through hole provided in the first substrate, the through disposing a projecting part of the mounted component therein; and a shielding member being provided on a back face side of the first substrate and covering an entirety or at least a part of an opening of the through hole.