Component Mounting Substrate Layout for Liquid Soak Detection
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Solution Overview
Problem
Existing component mount boards lack reliability in sensing their state when soaked in liquid, as they fail to accurately detect changes in the circuit properties due to moisture exposure.
Innovation Solution
A component mount board design featuring a base with a first conductive pattern and a second conductive pattern that forms a complementary circuit, where the base has a missing portion corresponding to the second conductive pattern, which is soluble or weakened by liquid, allowing for reliable detection of moisture exposure by changes in circuit impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complete base structure is used to support the circuit, then structural integrity is maintained, but the ability to sense liquid soaking is reduced
Solution Approach 1:
The base is segmented into regions with different properties: a first region providing structural support and a second region with a missing portion that exposes the soluble conductive pattern to liquid, enabling differential functionality within the base structure
Solution Approach 2:
Different regions of the base have different qualities: the first region maintains structural integrity while the second region is designed to be permeable to liquid through the missing portion, allowing each region to optimize its specific function
2Reliability
If the second conductive pattern is made soluble in liquid, then liquid sensing capability is improved, but circuit stability deteriorates
Solution Approach 1:
The conductive pattern is divided into two segments with different chemical properties: a first conductive pattern that is liquid-resistant for stable electrical connection, and a second conductive pattern that is soluble for liquid sensing, allowing each segment to fulfill its specific role
Solution Approach 2:
Different portions of the conductive pattern have different chemical compositions and responses to liquid: the first portion maintains stability while the second portion is designed to dissolve or weaken upon liquid contact, enabling localized functional differentiation
3Reliability
If a missing portion is created in the base, then liquid contact with the second conductive pattern is enabled, but manufacturing complexity increases
Solution Approach 1:
The missing portion is pre-formed in the base during the manufacturing process before final assembly, allowing the soluble conductive pattern to be subsequently applied in the exposed region without requiring complex post-processing steps
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
The design effectively senses the state of the board being soaked in liquid by detecting the dissolution or weakening of the second conductive pattern, ensuring accurate moisture detection and maintaining structural integrity.
Implementation Method 1
the second conductive pattern is soluble in liquid, or is weakened when becoming wet with liquid
Data Source
AI summary
Provided is a component mount board having a structure capable of more reliably sensing a state of the component mount board being soaked in liquid. A component mount board 100 includes a board 10 having a base 11, a first conductive pattern 30 formed on the base 11, and a mount component 50 electrically connected to the first conductive pattern 30 and a second conductive pattern 40 forming a circuit 60 together with the first conductive pattern 30 in a complementary manner. A portion of the base 11 corresponding to the second conductive pattern 40 is a missing portion 12 where the base 11 is missing. The second conductive pattern 40 is soluble in liquid, or is weakened when becoming wet with liquid.