Tape Head Bearing Surface Length Definition Process
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Solution Overview
Problem
Current tape heads face challenges in achieving high data density and efficient operation due to variations in tape properties and smaller feature sizes, which require larger magnetic bits and more fragile components, limiting their performance and reliability.
Innovation Solution
A magnetic head with a precisely defined tape bearing surface is fabricated using a substrate with a thin film layer and a slot extending along the substrate, where the length of the tape bearing surface between the substrate and the skiving edge is optimized to be between 7 to 30 microns, enabling efficient data storage and reduced component fragility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tape bearing surface length is increased to accommodate variations in tape properties and reduce wear, then reliability improves, but manufacturing precision becomes more difficult to maintain
Solution Approach 1:
The patent applies preliminary action by pre-defining the tape bearing surface length through a precisely controlled slot geometry during manufacturing. The slot is formed with specific dimensions (7-30 microns) before the head is assembled and put into service, ensuring that the tape bearing surface has the optimal length for reliability from the outset. This pre-established geometry compensates for variations in tape properties and reduces wear without requiring adjustment during operation.
Solution Approach 2:
The patent employs parameter changes by optimizing the tape bearing surface length to a specific range (7-30 microns) based on empirical and theoretical analysis. By changing this critical dimension to an optimal value, the patent simultaneously improves reliability through better tape contact and reduces manufacturing difficulty by establishing a achievable target range rather than requiring extreme precision at any single value within that range.
2Productivity
If smaller feature sizes are used to increase data density, then productivity improves, but component strength deteriorates
Solution Approach 1:
The patent applies local quality by concentrating the transducer elements and magnetic bit structures at specific locations with optimized dimensions, while maintaining larger, stronger support structures elsewhere in the head assembly. The tape bearing surface and slot geometry are locally optimized to provide structural reinforcement without compromising the small feature sizes needed for high data density in the active recording regions.
Solution Approach 2:
The patent employs composite materials by combining multiple layers and materials in the head construction, including substrate materials, coating layers, and structural components with different mechanical properties. This composite approach allows small features to be formed in regions requiring high precision while maintaining overall component strength through the integrated structure of different materials with complementary properties.
Data Source
AI summary
In one general embodiment, an apparatus includes a substrate, a thin film layer on the substrate having transducers therein, and a portion of a slot extending along the substrate, the portion of the slot defining a skiving edge. A length of a tape bearing surface between the thin film layer and the skiving edge is in a range of about 7 to about 30 microns. In another general embodiment, an apparatus includes a substrate, a thin film layer on the substrate having transducers therein, and a slot extending along the substrate, the slot defining a skiving edge. A length of a tape bearing surface between the thin film layer and the skiving edge is in a range of about 7 to about 30 microns.