Semiconductor Device Antenna Electrostatic Discharge Protection
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Solution Overview
Problem
Semiconductor devices with antennas and thin film transistors are prone to damage from electrostatic discharge due to charge accumulation in insulators like epoxy resins, leading to issues with electrostatic discharge and reduced communication efficiency.
Innovation Solution
Incorporating conductive films on both the antenna and thin film transistor sides, either inside or outside the insulators, to enhance electrostatic withstand voltage and protect against discharge, while ensuring the conductive films are electrically connected to mitigate dielectric polarization effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If insulators such as epoxy resins are used to protect the antenna and circuit, then the antenna and circuit are protected from physical damage, but electrostatic discharge occurs due to charge accumulation in the insulator
Solution Approach 1:
A conductive film is introduced as an intermediary layer between the insulator and the antenna/circuit. This conductive film serves as a mediator that prevents charge accumulation in the insulator by providing a discharge path, thereby eliminating electrostatic discharge while maintaining the protective function of the insulator.
Solution Approach 2:
The electrical properties of the insulator system are changed by adding a conductive film. The conductive film alters the charge distribution characteristics, enabling charge dissipation and preventing electrostatic discharge while the insulator continues to provide mechanical protection.
2Reliability
If a conductive film is provided outside the insulators, then electrostatic withstand voltage is increased, but the conductive film may peel due to friction after repeated use
Solution Approach 1:
The conductive film is nested inside the insulator rather than being placed outside. This nested configuration allows the insulator to protect the conductive film from external friction and mechanical stress, preventing peeling while maintaining the electrostatic protection function.
Solution Approach 2:
The insulator serves as a protective cushion for the conductive film before any friction or mechanical stress occurs. By positioning the conductive film inside the insulator, the insulator absorbs external forces and prevents direct contact between the conductive film and external friction sources.
3Reliability
If a conductive film is provided on the outer side of the antenna, then electrostatic protection is improved, but the resonant frequency decreases significantly
Solution Approach 1:
The conductive film is positioned locally between the insulator and the antenna/circuit rather than on the outer side of the antenna. This localized placement provides electrostatic protection through the conductive film while avoiding the presence of conductive material near the antenna that would cause resonant frequency shifts.
Solution Approach 2:
The conductive film acts as an intermediary layer positioned between the insulator and the antenna, providing electrostatic protection without directly contacting the antenna. This intermediate positioning prevents the conductive film from interfering with the antenna's electromagnetic field and resonant frequency.
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 increases electrostatic withstand voltage, reduces the risk of conductive film peeling, and minimizes the adverse impact on resonant frequency, thereby enhancing the reliability and communication distance of semiconductor devices.
Implementation Method 1
insulators such as epoxy resins easily accumulate electric charge. Therefore, due to discharge of electric charge accumulated in an insulator, there has been a problem in that the antenna or the circuit including the thin film transistor is damaged (a problem of electrostatic discharge).
Implementation Method 2
both the conductive films are electrically connected to each other. Thus, an adverse effect of electrostatic discharge due to dielectric polarization can be reduced
Data Source
AI summary
To solve a problem in that an antenna or a circuit including a thin film transistor is damaged due to discharge of electric charge accumulated in an insulator (a problem of electrostatic discharge), a semiconductor device includes a first insulator, a circuit including a thin film transistor provided over the first insulator, an antenna which is provided over the circuit and is electrically connected to the circuit, and a second insulator provided over the antenna, a first conductive film provided between the first insulator and the circuit, and a second conductive film provided between the second insulator and the antenna.