Ground Terminal Structure for Stable RF Antenna Welding
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Solution Overview
Problem
Existing ground terminals with overlaid metal layers face issues of misalignment and warping during welding, leading to potential short circuits and inconsistent bonding, particularly in RF antenna grounding regions.
Innovation Solution
A ground terminal design featuring a core body with multiple bonding layers and a metal support plate, where the metal work piece includes interconnected welding layers and a wrapping layer to stabilize the structure, ensuring consistent conductivity and resistance to misalignment and warping during welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultrasonic or laser welding technology using metal layer overlaying is used to connect ground terminals, then electrical connection stability is improved, but the metal layers are prone to misalignment and warping during welding
Solution Approach 1:
The patent introduces a core body as an intermediary component between the first and second metal layers. The core body provides a stable foundation that supports both metal layers, preventing their direct contact from causing warping and misalignment during welding. This mediator structure ensures proper positioning and maintains manufacturing precision while achieving reliable electrical connection.
Solution Approach 2:
The ground terminal employs a composite structure consisting of multiple materials: core body material, first metal layer material, second metal layer material, and bonding layer material. This composite design combines the advantages of each material to achieve both welding stability and dimensional precision, resolving the contradiction between connection reliability and alignment accuracy.
2Ease of manufacture
If adhesive layer bonding is used before welding metal layers, then initial positioning is improved, but the bonding becomes fragile and prone to misalignment under external force
Solution Approach 1:
The bonding layer performs preliminary positioning of the metal layers on the core body before the welding process. This preliminary action ensures correct alignment is established early in manufacturing, while the subsequent welding provides the final strong bonding, combining ease of manufacture with structural strength.
Solution Approach 2:
The bonding layer acts as a cushioning element that protects the metal layers from misalignment under external forces during handling and assembly. It provides a buffer that maintains positioning accuracy while the welding process creates the permanent strong bond.
3Productivity
If laser welding is used on ground terminals with PI film, then welding speed is improved, but high temperature causes focus on PI film affecting molten pool conductivity
Solution Approach 1:
The core body serves as an intermediary that absorbs and distributes the thermal energy from laser welding, preventing excessive temperature concentration on the PI film. This mediator structure allows high-speed laser welding to proceed while maintaining molten pool conductivity by controlling heat distribution.
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 provides a stable welding structure that maintains conductivity and prevents misalignment or fracture even after repeated pressing, ensuring reliable grounding performance and extended service life.
Implementation Method 1
a first bonding layer is attached to an upper surface of the core body; the second bonding layer is attached to a lower surface of the core body
Implementation Method 2
an ultrasonic or laser welding technology using metal layer overlaying has emerged
Implementation Method 3
an ultrasonic or laser welding technology using metal layer overlaying has emerged
Data Source
AI summary
Disclosed are a ground terminal and an electronic device. The ground terminal includes a core body, a first bonding layer, a second bonding layer, a metal support plate, a third bonding layer, a fourth bonding layer, and a metal work piece. The metal support plate is attached to a lower part of the core body. The metal work piece includes a contact layer, a side layer, an upper welding layer, a wrapping layer, and a lower welding layer. The contact layer is attached to an upper part of the core body, the side layer is located on one side of the core body, the upper welding layer is connected to the metal support plate, the wrapping layer wraps an end portion of the metal support plate, the upper and lower welding layers are connected to a top end of the wrapping layer and the metal support plate, respectively.