Wiring Circuit Board Shield Pattern Prevents Short Circuits
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Solution Overview
Problem
The existing suspension board with circuit experiences short circuits between power supply wiring and signal wiring, which can lead to electrostatic breakdown of components.
Innovation Solution
A wiring circuit board design featuring a metal support layer, base insulating layer, and conductive layer with a shield wiring pattern electrically connected to the metal support layer, positioned between the power supply wiring and signal wiring to prevent short circuits, along with inspection terminals and ground connecting portions for continuity inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power supply wiring and signal wiring are disposed adjacent to each other to save space and simplify structure, then the device complexity is reduced, but the reliability deteriorates due to short circuit risks
Solution Approach 1:
A ground wiring is introduced as an intermediary element between the power supply wiring and signal wiring. This ground wiring acts as a mediator that maintains electrical isolation between the power supply wiring (which may be charged) and the signal wiring, preventing direct short circuits while allowing the wires to be disposed adjacent to each other for simplified structure.
2Reliability
If the shield wiring pattern is added to prevent short circuits, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The ground wiring pattern serves multiple functions simultaneously: it acts as a shield to prevent short circuits between power supply and signal wirings, provides a reference potential for electrical signals, and enables continuity inspection through the inspection terminal. This multi-functionality reduces the need for separate shielding structures, thereby limiting the increase in device complexity.
3Ease of repair
If the inspection terminal is added to the shield wiring pattern, then the ease of repair is improved for continuity inspection, but the device complexity increases
Solution Approach 1:
The inspection terminal is integrated directly into the ground wiring pattern, allowing the wiring structure to self-diagnose its continuity status. The inspection terminal enables the system to provide its own diagnostic capability without requiring external complex testing equipment, thereby improving ease of repair while adding minimal complexity.
Data Source
AI summary
A suspension board with circuit including a first mounting region for mounting a slider and a second mounting region for mounting a piezoelectric element. The wiring circuit board includes a metal support layer, a base insulating layer, and a conductive layer. The conductive layer includes a first wiring pattern, a second wiring pattern, and a shield wiring pattern. The first wiring pattern includes a read wiring. The second wiring pattern includes a power supply wiring disposed at spaced intervals to the read wiring. The shield wiring pattern includes a shield wiring disposed between the read wiring and the power supply wiring.