Segmented Tape Head Closure Design to Reduce Tape Damage
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Solution Overview
Problem
Tape heads in tape drive systems experience friction and high contact force due to prolonged contact with the tape, leading to damage and reduced tape lifetime, which affects data readability and writability.
Innovation Solution
The tape head module features a substrate with data heads and a closure comprising recessed side portions and a central portion with notches or steps to minimize tape contact during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tape head module maintains prolonged contact with the tape for data reading and writing, then data transfer function is improved, but friction and contact force increase causing tape damage
Solution Approach 1:
The closure is segmented into multiple portions (first side portion, second side portion, and central portion) with different contact characteristics. The recessed side portions minimize contact to reduce friction, while the central portion maintains necessary contact for data transfer, thus segmenting the contact function to resolve the contradiction between data transfer reliability and friction reduction.
Solution Approach 2:
Different portions of the closure have different geometric properties: the side portions are recessed to reduce contact, while the central portion has specific features (notch, taper, or steps) optimized for data transfer. This local differentiation allows the tape head module to have minimal contact overall while maintaining functional contact where needed, resolving the contradiction between reduced friction and maintained data transfer capability.
2Ease of manufacture
If the tape head module uses a flat closure design, then manufacturing is simplified, but tape contact area increases causing more friction and damage
Solution Approach 1:
The closure uses local geometric modifications (recesses, notches, tapers, or steps) only in specific areas rather than changing the entire closure geometry. The side portions are recessed while the central portion maintains appropriate features for data transfer. This localized approach reduces overall contact area and friction while keeping the manufacturing process relatively simple, resolving the contradiction between ease of manufacture and friction reduction.
Solution Approach 2:
The closure design introduces vertical dimension variations (recesses and steps) to a traditionally flat structure. By creating depth variations in the closure geometry, the design reduces the contact area with the tape without significantly complicating the manufacturing process, thus resolving the contradiction between simple manufacturing and reduced friction.
3Stability of the object's composition
If the closure makes full contact with the tape, then structural stability is improved, but tape lifetime is reduced due to increased friction
Solution Approach 1:
The closure is divided into functional segments: recessed side portions that minimize contact to reduce friction and extend tape life, and a central portion that maintains structural integrity and provides necessary contact for data transfer. This segmentation allows the closure to maintain structural stability while reducing overall contact area, thus resolving the contradiction between structural stability and tape lifetime.
Solution Approach 2:
The closure design changes the contact parameters by creating recesses and geometric features that reduce the contact area and contact pressure. The central portion may include notches, tapers, or steps that optimize the contact characteristics. These parameter changes allow the closure to maintain sufficient structural stability while minimizing friction and extending tape lifetime.
Data Source
AI summary
In a tape drive comprising a tape head module, a tape contacts the tape head module during operation. The tape head module comprises a substrate, a plurality of data heads disposed adjacent to the substrate at a media facing surface (MFS), and a closure disposed adjacent to the plurality of data heads. The closure comprises a first side portion disposed at a leading edge, a second side portion disposed at the leading edge, the first and second side portions being recessed from the MFS, and a central portion disposed between the first and second side portions at the leading edge. In some embodiments, the central portion is recessed from the MFS. The central portion may comprise a notch, a taper, or one or more steps. The first and second side portions may be tapered, rounded, or comprise one or more steps to reduce contact of a tape during operation.