PATENT CLAIM ANALYSIS

Application Number: 16184312
Application Type: Utility
Filing Date: 2018-11
Publication Date: 2019-03
Patent Classification: ["360", "055000"]

Abstract:
The magnetic tape device includes a TMR head (servo head); and a magnetic tape, in which a magnetic layer of the magnetic tape includes fatty acid ester, Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, full widths at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before and after performing a vacuum heating with respect to the magnetic tape are greater than 0 nm and equal to or smaller than 7.0 nm, a difference between spacings before and after the vacuum heating is greater than 0 nm and equal to or smaller than 8.0 nm, and ΔSFD (=SFD 25° C. −SFD −#° C. ) in a longitudinal direction of the magnetic tape is equal to or smaller than 0.50.

Claim (Index 7):
A head tracking servo method comprising:\n reading a servo pattern of a magnetic layer of a magnetic tape by a servo head in a magnetic tape device, wherein the servo head is a magnetic head including a tunnel magnetoresistance effect type element as a servo pattern reading element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder, a binding agent, and fatty acid ester on the non-magnetic support, the magnetic layer includes the servo pattern, a full width at half maximum of spacing distribution measured by optical interferometry regarding the surface of the magnetic layer before performing a vacuum heating with respect to the magnetic tape is greater than 0 nm and equal to or smaller than 7.0 nm, a full width at half maximum of spacing distribution measured by optical interferometry regarding the surface of the magnetic layer after performing the vacuum heating with respect to the magnetic tape is greater than 0 nm and equal to or smaller than 7.0 nm, a difference S after \u2212S before  between a spacing S after  measured by optical interferometry regarding the surface of the magnetic layer after performing the vacuum heating with respect to the magnetic tape and a spacing S before  measured by optical interferometry regarding the surface of the magnetic layer before performing the vacuum heating with respect to the magnetic tape is greater than 0 nm and equal to or smaller than 8.0 nm, and \u0394SFD in a longitudinal direction of the magnetic tape calculated by Expression 1 is equal to or smaller than 0.50,\n \u0394 SFD=SFD 25\u00b0 C. \u2212SFD \u2212190\u00b0 C. \u2003\u2003Expression 1 \n in Expression 1, the SFD 25\u00b0 C.  is a switching field distribution SFD measured in a longitudinal direction of the magnetic tape at a temperature of 25\u00b0 C., and the SFD \u2212190\u00b0 C.  is a switching field distribution SFD measured in a longitudinal direction of the magnetic tape at a temperature of \u2212190\u00b0 C.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 98.0
- Lexical Diversity: 2.08451
- Patent Class: 360.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15920563', '15920533', '15854506', '15920635', '15920517']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6959908669112419
- 35 USC 102 Novelty (BERT): 0.5907609880761242
- Combined Prediction Score: 0.6854678790277302
- Mean Citation Score: 434.166554
- Max Citation Score: 487.6848
- Similarity Product: 452.5705511924744

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test