Slider-Flexure Insulator Pattern for Adhesive Spread Control
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Solution Overview
Problem
The spread adhesive between the slider and the flexure affects the resonance characteristics of the slider during the attachment process in disk devices.
Innovation Solution
A disk device design that includes a flexure with an insulator featuring a PI pattern comprising walls and protrusions to restrict the spread of adhesive, allowing it to adhere only within a controlled area, thereby minimizing interference with the slider's resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is pressed and spread between the slider and flexure to attach the slider, then the slider attachment is achieved, but the resonance characteristics of the slider are affected
Solution Approach 1:
The insulator is designed with a specific pattern (including walls and protrusions) that creates different local zones: some areas allow adhesive to spread while others restrict it. This local differentiation enables the adhesive to provide sufficient bonding strength in certain regions while preventing excessive spread that would harm resonance characteristics.
Solution Approach 2:
The insulator acts as an intermediary component between the flexure and the adhesive. It mediates the interaction by providing a structured surface that controls adhesive behavior, allowing the adhesive to function as intended without directly contacting the slider in a way that would compromise resonance.
2Strength
If adhesive spreads freely between the slider and flexure, then sufficient bonding area is achieved, but resonance disruptions occur
Solution Approach 1:
The insulator surface is designed with spatially varying properties: areas with walls and protrusions restrict adhesive spread, while other areas allow controlled adhesion. This local quality differentiation enables sufficient bonding area without allowing the adhesive to spread freely across the entire surface, thereby preventing resonance disruption.
3Reliability
If the adhesive is contained within a controlled area, then resonance characteristics are preserved, but the bonding area is reduced
Solution Approach 1:
The insulator pattern creates localized zones with different adhesive containment properties. By strategically placing walls and protrusions, the design ensures that adhesive is contained within controlled areas to preserve resonance, while still providing sufficient bonding area through the distributed pattern of allowed adhesion zones.
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 adhesive is contained and controlled, preventing resonance disruptions and ensuring stable slider attachment without affecting the device's performance.
Implementation Method 1
The adhesive adheres the outer surface
Data Source
AI summary
According to one embodiment, a disk device includes a first adhesive attaching a slider to a suspension. A flexure of the suspension includes an outer surface of a metal plate and an insulator. The insulator surrounds the first adhesive. The insulator includes two first walls, a second wall, and a third wall. The first walls extend closer to each other toward a axis of a carriage. The second wall is spaced apart from the first walls and further away from the axis than the first walls. The third wall is located at a center of the insulator in a circumferential direction and is located between the first walls and the second wall. The third wall is shorter than the second wall. The distance between the second wall and the third wall is shorter than a distance between the first walls and the third wall.