Gap-Type ESD Protection Device with Thin Film Electrodes
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Solution Overview
Problem
Existing ESD protection devices in high-speed transmission systems have high discharge starting voltages and inadequate durability, with conventional antistatic components failing to provide sufficient electrostatic absorption and being prone to short-circuiting or electrode damage, which limits their repeated use.
Innovation Solution
A gap-type ESD protection device with electrodes spaced 0.5 μm to 10 μm apart and a thickness ratio of 1:30, utilizing a functional layer of discontinuously dispersed conductive inorganic materials in an insulating inorganic matrix, enhances discharge starting voltage reduction and durability while improving heat resistance and weather resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antistatic components with long-lasting electrodes are used, then electrostatic protection is provided, but discharge starting voltage is high and durability is poor
Solution Approach 1:
The patent changes the physical parameters of the electrode structure by controlling the gap distance (0.01-10 μm) and electrode thickness (1-100 nm) to optimize both discharge starting voltage and durability. This parameter optimization allows the device to achieve low discharge voltage while maintaining electrode integrity through repeated discharges.
Solution Approach 2:
The patent uses composite materials consisting of inorganic particles (conductive or insulating) dispersed in a resin matrix to form the electrostatic protection material. This composite structure provides both the necessary electrostatic discharge characteristics and mechanical durability, preventing electrode short-circuiting while maintaining low discharge starting voltage.
2Object-generated harmful factors
If electrode gap is reduced to lower discharge starting voltage, then electrostatic absorption improves, but electrodes may short-circuit during discharge
Solution Approach 1:
The patent employs extremely thin electrode films (1-100 nm thickness) that maintain structural integrity even at small gap distances (0.01-10 μm). These thin film electrodes are sufficiently flexible and resilient to withstand discharge stresses without short-circuiting, while maintaining the small gap necessary for low discharge starting voltage.
Solution Approach 2:
The patent introduces an electrostatic protection material layer comprising inorganic particles in a resin matrix as an intermediary between the electrodes. This material fills the gap space and provides mechanical support, preventing direct electrode contact during discharge while maintaining the small gap distance needed for low discharge voltage.
3Ease of manufacture
If conventional screen printing methods are used, then manufacturing is simple, but film thickness cannot be sufficiently reduced and productivity is limited
Solution Approach 1:
The patent replaces conventional screen printing (mechanical deposition) with coating methods that enable precise control of film thickness at the nanometer scale. This substitution allows achieving electrode thicknesses of 1-100 nm and gap distances of 0.01-10 μm, which are impossible with traditional screen printing, thereby improving productivity through thinner films while maintaining manufacturing feasibility.
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 solution effectively lowers discharge starting voltage, increases durability, and enhances heat and weather resistance, allowing for thinner films, improved productivity, and reduced costs in ESD protection devices and composite electronic components.
Implementation Method 1
an ESD protection device which can advantageously be combined with a common mode filter... electrostatic pulses generated when a human body comes into contact with a terminal
Data Source
AI summary
An object of the present invention is to provide an ESD protection device and the like which offer a reduced discharge starting voltage and improved durability against repeated use. The present invention provides an ESD protection device including a base 2 having an insulating surface 2a, electrodes 3a and 3b disposed on the insulating surface 2a and facing but spaced apart from each other, and a functional layer 4 disposed on at least between the electrodes 3a and 3b, wherein the gap distance ΔG between the electrodes 3a and 3b ranges from 0.5 μm to 10 μm, and the thickness ΔT of each of the electrodes 3a and 3b meets a relationship of ΔG/ΔT=1 to 30.