Wireless Module Shielding Films as Integrated Battery Charging Pads
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Solution Overview
Problem
The challenge is to downsize wireless devices while enabling them to operate independently with a rechargeable battery, requiring an efficient charging mechanism that does not increase the device's size.
Innovation Solution
The solution involves a wireless device structure with a substrate, semiconductor devices, non-conductive sealing, and separate metal films acting as charging pads, which are electrically insulated and used for both charging and electromagnetic shielding, allowing the rechargeable battery to be mounted without the need for an external charging pad or connector, thus maintaining device compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rechargeable battery is mounted on a small wireless device, then the device can operate independently without external power supply, but the device size increases due to the need for additional charging pads and connectors
Solution Approach 1:
The patent applies multi-functionality by making the electromagnetic shielding films serve dual purposes: they provide electromagnetic shielding for the semiconductor device while simultaneously acting as charging pads for the rechargeable battery. This eliminates the need for separate charging pad structures, thereby enabling independent operation without increasing device volume.
Solution Approach 2:
The patent merges the electromagnetic shielding function with the charging pad function into a single integrated structure. The metal films that shield the semiconductor device are electrically connected to the rechargeable battery terminals, combining two previously separate components into one, thus avoiding additional space requirements.
2Ease of operation
If separate charging pads are provided for the rechargeable battery, then charging functionality is achieved, but the device complexity and size increase
Solution Approach 1:
The electromagnetic shielding films perform multiple functions: they shield the semiconductor device from electromagnetic interference and simultaneously serve as charging pads for power transfer. This eliminates the need for separate charging pad structures and reduces overall device complexity.
Solution Approach 2:
The patent extracts the charging pad function from being a separate component and integrates it into the existing electromagnetic shielding structure. By making the shielding films electrically conductive and connecting them to the battery terminals, the charging functionality is achieved without adding separate charging pad structures.
3Volume of moving object
If the metal films are used for both charging and electromagnetic shielding, then downsizing is achieved, but the electrical insulation requirements become more stringent
Solution Approach 1:
The patent segments the metal films into separate, electrically insulated regions: first metal films connected to one battery terminal and second metal films connected to the other terminal. The non-conductive portion physically separates these conductive regions, ensuring electrical insulation while maintaining the dual function of electromagnetic shielding and charging within a compact structure.
Solution Approach 2:
The non-conductive portion acts as an intermediary element that physically separates and electrically insulates the first and second metal films while allowing both to serve as charging pads. This mediator ensures reliable electrical insulation between oppositely charged battery terminals while maintaining the compact integrated structure.
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 enables the charging of a rechargeable battery within the wireless device while achieving downsizing, as the metal films function both as charging pads and electromagnetic shields, eliminating the need for additional charging infrastructure and allowing for larger battery capacity without increasing the device's size.
Implementation Method 1
The first metal film is provided on a surface of the non-conductive portion and to at least one edge surface of the substrate to make contact at the edge surface with a first wire disposed on the substrate. The second metal film is provided on the surface of the non-conductive portion and to the at least one edge surface of the substrate and separately from the first metal film to make contact at the edge surface with a second wire disposed on the substrate.
Implementation Method 2
The non-conductive portion is formed on a first surface of the substrate to seal the semiconductor device
Implementation Method 3
the metal films function both as charging pads and electromagnetic shields
Data Source
AI summary
According to an embodiment, an electronic apparatus includes a substrate, a semiconductor device, a non-conductive portion, first and second metal films, and a rechargeable battery. The semiconductor device is mounted on a first surface of the substrate and includes a wireless circuit. The non-conductive portion is formed on the first surface to seal the semiconductor device. The first metal film is provided along a surface of the non-conductive portion and at least one edge surface of the substrate to contact at the edge surface with a first-wire disposed on the substrate. The second metal film is provided along the surface of the non-conductive portion and the edge surface and separately from the first metal film to contact at the edge surface with a second-wire disposed on the substrate. The rechargeable battery includes first and second electrodes electrically connected to the first-wire and to the second-wire, respectively.