Position Detection Lead Line Welding Gap Design
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Solution Overview
Problem
In position detection devices, the deformation of lead lines during connection with terminal lines can apply a load to IC packages, potentially causing breakage due to mismatched distances between the lead lines and terminal lines, leading to disconnection of bonding within the IC package.
Innovation Solution
The design ensures that the distance from the package installation surface of the sensor housing to the end face of the terminal line is longer than the distance from the end face of the lead line to the opposing surface of the IC package, creating a gap that allows for secure welding without deforming the lead lines, thus preventing damage to the IC package.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lead line is directly connected to the terminal line without sufficient distance, then the connection is compact and device size is reduced, but the lead line deforms during welding and applies load to the IC package causing breakage
Solution Approach 1:
The patent introduces an intermediary space (gap) between the lead line and terminal line that allows for proper welding alignment without deforming the lead line. This intermediary distance acts as a buffer zone that prevents direct mechanical coupling that would cause stress transmission to the IC package.
2Reliability
If the distance between lead line and terminal line is increased to prevent deformation, then IC package reliability is improved, but device size increases
Solution Approach 1:
The patent optimizes the distance parameter between the lead line and terminal line to a specific range that is sufficient to prevent lead line deformation during welding, yet compact enough to maintain small device size. This parameter optimization balances the conflicting requirements of reliability and miniaturization.
3Stability of the object's composition
If the lead line is fixed rigidly to the terminal line, then connection stability is improved, but any misalignment causes deformation and IC package damage
Solution Approach 1:
The patent provides beforehand cushioning by establishing a sufficient distance between the lead line and terminal line before welding occurs. This pre-established gap acts as a cushion that absorbs misalignment errors and prevents deformation during the welding process, while still allowing for stable connection after welding.
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 secure fixation of lead lines to terminal lines without applying a load that could break the IC package, ensuring reliable operation and preventing disconnection of bonding within the IC package.
Implementation Method 1
a magnetic detection element configured to output a signal corresponding to a direction or intensity of a surrounding magnetic field
Implementation Method 2
The lead line is fixed to the terminal line
Data Source
AI summary
The present disclosure provides a position detection device including an IC package, a terminal line and a sensor housing. The IC package includes a magnetic detection element, a sealing portion sealing the magnetic detection element, and a lead line protruding from the sealing portion and electrically connected to the magnetic detection element. The lead line is fixed to the terminal line. The sensor housing is formed separately from the IC package and supports the terminal line.