Textured Slider Bonding Surface for HDD Shear Strength
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Solution Overview
Problem
In hard disk drives (HDDs), sliders detach from suspensions due to shear forces during operation, leading to a need for a solution that ensures the slider remains attached to the suspension.
Innovation Solution
A textured bonding surface on the slider increases its surface area, enhancing the bonding with the suspension and increasing the shear stress required to debond, thereby preventing detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a smooth bonding surface is used on the slider, then the manufacturing process is simple, but the bonding strength between slider and suspension is insufficient under shear forces
Solution Approach 1:
The patent applies surface texturing that creates curved or rounded features on the bonding surface of the slider. This curvature increases the effective bonding area and allows the adhesive to better conform to the surface, thereby improving bonding strength while maintaining manufacturing feasibility through standard texturing processes.
Solution Approach 2:
The patent creates a porous or textured surface structure on the slider bonding surface. This increased surface roughness and porosity provides greater surface area for adhesive bonding and creates mechanical interlocking effects, significantly enhancing the bonding strength between the slider and suspension assembly.
2Strength
If the bonding surface area is increased through texturing, then the bonding strength increases, but the manufacturing precision requirements increase
Solution Approach 1:
The patent divides the bonding surface into multiple discrete textured features or zones rather than creating a uniformly complex surface. This segmentation allows each feature to be manufactured with standard precision while collectively providing the desired increased bonding area and strength.
Solution Approach 2:
The patent optimizes the texturing parameters (feature size, spacing, depth, density) to achieve the desired bonding strength while remaining within manufacturable precision ranges. By carefully selecting and adjusting these parameters, the design balances bonding performance with manufacturing capabilities.
Data Source
AI summary
The present disclosure generally relates to a slider having a textured bonding surface. The slider may be used in a hard disk drive (HDD). The textured bonding surface permits the slider to be effectively bonded to a suspension and prevent the slider from debonding from the suspension due to shear forces that may occur during HDD operation.