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1. WO2020195150 - SERVO SIGNAL VERIFICATION DEVICE, SERVO WRITER, METHOD FOR MANUFACTURING MAGNETIC RECORDING TAPE, AND SERVO SIGNAL READING HEAD

Publication Number WO/2020/195150
Publication Date 01.10.2020
International Application No. PCT/JP2020/003577
International Filing Date 31.01.2020
IPC
G11B 5/09 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
02Recording, reproducing or erasing methods; Read, write or erase circuits therefor
09Digital recording
G11B 5/23 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
187Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to, the recording medium; Pole pieces; Gap features
23Gap features
G11B 5/29 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
29Structure or manufacture of unitary devices formed of plural heads for more than one track
G11B 5/584 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads relative to record carriers
58with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
584for track following on tapes
G11B 5/706 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
68comprising one or more layers of magnetisable particles homogeneously mixed with a bonding agent
70on a base layer
706characterised by the composition of the magnetic material
G11B 21/10 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
21Head arrangements not specific to the method of recording or reproducing
02Driving or moving of heads
10Track finding or aligning by moving the head
Applicants
  • ソニー株式会社 SONY CORPORATION [JP]/[JP]
Inventors
  • 森田 博司 MORITA Hiroshi
Agents
  • 渡邊 薫 WATANABE Kaoru
Priority Data
2019-06133227.03.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) SERVO SIGNAL VERIFICATION DEVICE, SERVO WRITER, METHOD FOR MANUFACTURING MAGNETIC RECORDING TAPE, AND SERVO SIGNAL READING HEAD
(FR) DISPOSITIF DE VÉRIFICATION DE SIGNAL D'ASSERVISSEMENT, DISPOSITIF D'ÉCRITURE D'ASSERVISSEMENT, PROCÉDÉ PERMETTANT DE FABRIQUER UNE BANDE D'ENREGISTREMENT MAGNÉTIQUE, ET TÊTE DE LECTURE DE SIGNAL D'ASSERVISSEMENT
(JA) サーボ信号ベリファイ装置、サーボライタ、磁気記録テープの製造方法、及びサーボ信号読取ヘッド
Abstract
(EN)
Provided is a servo signal verification device for verifying a servo signal in a magnetic recording tape having a high recording density. The present invention provides a servo signal verification device provided with: at least one servo signal reading head that reads a servo signal written in a servo band of a magnetic recording tape; a first amplifier that amplifies the servo signal read by the servo signal reading head; and a second amplifier that includes a low-pass filter having a cutoff frequency of 35 MHz or less and that amplifies the signal amplified by the first amplifier. The present invention also provides a servo writer that includes the servo signal verification device, and a method for manufacturing a magnetic recording tape, which uses the servo signal verification device. The present invention further provides a servo signal reading head included in the servo signal verification device.
(FR)
L'invention concerne un dispositif de vérification de signal d'asservissement permettant de vérifier un signal d'asservissement dans une bande d'enregistrement magnétique présentant une densité d'enregistrement élevée. La présente invention concerne un dispositif de vérification de signal d'asservissement comprenant : au moins une tête de lecture de signal d'asservissement qui lit un signal d'asservissement écrit dans une bande d'asservissement d'une bande d'enregistrement magnétique ; un premier amplificateur qui amplifie le signal d'asservissement lu par la tête de lecture de signal d'asservissement ; et un second amplificateur qui comprend un filtre passe-bas présentant une fréquence de coupure de 35 MHz ou moins et qui amplifie le signal amplifié par le premier amplificateur. La présente invention concerne également un dispositif d'écriture d'asservissement qui comprend le dispositif de vérification de signal d'asservissement, et un procédé permettant de fabriquer une bande d'enregistrement magnétique, qui utilise le dispositif de vérification de signal d'asservissement. La présente invention concerne en outre une tête de lecture de signal d'asservissement comprise dans le dispositif de vérification de signal d'asservissement.
(JA)
記録密度の高い磁気記録テープのサーボ信号のベリファイを行うためのサーボ信号ベリファイ装置を提供すること。本技術は、磁気記録テープのサーボバンドに書き込まれたサーボ信号を読み取る少なくとも一つのサーボ信号読取ヘッドと、前記サーボ信号読取ヘッドにより読み取られたサーボ信号を増幅する第一の増幅器と、カットオフ周波数が35MHz以下であるローパスフィルタを含む、前記第一の増幅器により増幅された信号を増幅する第二の増幅器と、を備えているサーボ信号ベリファイ装置を提供する。また、本技術は、当該サーボ信号ベリファイ装置を含むサーボライタ、及び、当該サーボ信号ベリファイ装置を用いた磁気記録テープの製造方法も提供する。また、本技術は、当該サーボ信号ベリファイ装置を構成するサーボ信号読取ヘッドも提供する。
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