Tape Head Antiferromagnetic Coupling Null Shield
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Solution Overview
Problem
Conventional tape heads require separate structures for writing and read-verifying data, leading to precise assembly challenges, susceptibility to mis-registration due to tape skew, and potential data loss from time delays between writing and reading.
Innovation Solution
A tape head with a same gap verify (SGV) module comprising write and read transducer pairs on a substrate, where a null shield with antiferromagnetic coupling materials creates a null region to protect the read transducer from write flux, allowing concurrent writing and read verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate head structures are used for writing and read-verifying data, then data verification capability is improved, but assembly precision requirements increase and mis-registration susceptibility worsens
Solution Approach 1:
The patent combines the write transducer and read transducer into a single integrated head structure, eliminating the need for separate head structures. This merging approach maintains data verification capability while reducing assembly precision requirements and mis-registration susceptibility by having both transducers positioned at the same location on the tape.
Solution Approach 2:
The patent introduces a null shield as an intermediary component between the write transducer and read transducer. This null shield creates a null region that blocks write flux from reaching the read transducer, enabling simultaneous write and read operations without interference while maintaining the integrated head structure.
2Reliability
If separate head structures are used for writing and read-verifying data, then data verification capability is improved, but time delay between writing and reading increases
Solution Approach 1:
By integrating the write and read transducers in the same head structure positioned at the same location on the tape, the patent enables immediate verification of written data without the time delay inherent in separate head structures. The concurrent operation capability eliminates re-writing requirements for uncorrectable errors.
3Productivity
If write transducer and read transducer are positioned close together for concurrent operation, then productivity is improved, but write flux interference with read transducer worsens
Solution Approach 1:
The null shield serves as an intermediary component that blocks write flux from reaching the read transducer. By positioning the null shield between the write and read transducers, the patent creates a null region that eliminates flux interference while maintaining the close positioning necessary for concurrent operation and immediate verification.
Solution Approach 2:
The patent creates a localized null region between the write and read transducers using the null shield. This local modification of the magnetic field environment allows the read transducer to operate free from write flux interference in its specific location while the write transducer continues to function normally.
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
Enables efficient and accurate data writing and immediate verification within a single head structure, reducing data loss and mis-registration issues while maintaining data integrity.
Implementation Method 1
The null shield is used to create a null region, or a region where write flux goes to zero, and comprises laminated antiferromagnetic coupling materials to protect writer flux from going to the read transducer
Data Source
AI summary
The present disclosure generally relates to a tape drive including a tape head. The tape head comprises at least one same gap verify (SGV) module comprising a plurality of write transducer and read transducer pairs disposed on a substrate. Each pair comprises a null shield disposed between the write transducer and the read transducer. The null shield is used to create a null region, or a region where write flux goes to zero, and comprises laminated antiferromagnetic coupling materials to protect writer flux from going to the read transducer. The read transducer is disposed in the null region. The SGV module is configured to write data to a tape using the write transducer of each pair and read verify the data written on the tape using the read transducer of each pair such that the write transducer and read transducer of each pair are concurrently operable.