JPS55108931A - Inspection method of magnetic disc surface - Google Patents

Inspection method of magnetic disc surface

Info

Publication number
JPS55108931A
JPS55108931A JP1561279A JP1561279A JPS55108931A JP S55108931 A JPS55108931 A JP S55108931A JP 1561279 A JP1561279 A JP 1561279A JP 1561279 A JP1561279 A JP 1561279A JP S55108931 A JPS55108931 A JP S55108931A
Authority
JP
Japan
Prior art keywords
head
disc surface
protrusion
resonance frequency
magnetic disc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1561279A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6140044B2 (enExample
Inventor
Akira Minami
Kenichi Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP1561279A priority Critical patent/JPS55108931A/ja
Publication of JPS55108931A publication Critical patent/JPS55108931A/ja
Publication of JPS6140044B2 publication Critical patent/JPS6140044B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Measuring Magnetic Variables (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
JP1561279A 1979-02-13 1979-02-13 Inspection method of magnetic disc surface Granted JPS55108931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1561279A JPS55108931A (en) 1979-02-13 1979-02-13 Inspection method of magnetic disc surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1561279A JPS55108931A (en) 1979-02-13 1979-02-13 Inspection method of magnetic disc surface

Publications (2)

Publication Number Publication Date
JPS55108931A true JPS55108931A (en) 1980-08-21
JPS6140044B2 JPS6140044B2 (enExample) 1986-09-06

Family

ID=11893520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1561279A Granted JPS55108931A (en) 1979-02-13 1979-02-13 Inspection method of magnetic disc surface

Country Status (1)

Country Link
JP (1) JPS55108931A (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5737207A (en) * 1980-08-19 1982-03-01 Nippon Telegr & Teleph Corp <Ntt> Detecting mechanism for projection part on recording medium
JPS617480A (ja) * 1984-06-21 1986-01-14 Hitachi Electronics Eng Co Ltd ディスク型記録媒体テスタ
JPS62134555A (ja) * 1985-12-06 1987-06-17 Fujitsu Ltd 磁気記録媒体の試験方法
CN105403179A (zh) * 2015-11-21 2016-03-16 中北大学 超声深孔直线度检测方法及装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5737207A (en) * 1980-08-19 1982-03-01 Nippon Telegr & Teleph Corp <Ntt> Detecting mechanism for projection part on recording medium
JPS617480A (ja) * 1984-06-21 1986-01-14 Hitachi Electronics Eng Co Ltd ディスク型記録媒体テスタ
JPS62134555A (ja) * 1985-12-06 1987-06-17 Fujitsu Ltd 磁気記録媒体の試験方法
CN105403179A (zh) * 2015-11-21 2016-03-16 中北大学 超声深孔直线度检测方法及装置

Also Published As

Publication number Publication date
JPS6140044B2 (enExample) 1986-09-06

Similar Documents

Publication Publication Date Title
JPS56119917A (en) Track deviation detecting system in magnetic recording and reproducing device
JPS55108931A (en) Inspection method of magnetic disc surface
JPS56142409A (en) Angle detector
JPS55108924A (en) Inspection method for floating quantity of magnetic head
JPS558629A (en) Defect avoiding system in magnetic recording device
SU1310707A1 (ru) Способ магнитографического контрол ферромагнитных изделий
JPS531584A (en) Ultrasonic flaw detector
JPS5315807A (en) Detecting circuit for magnetically recorded information
JPS6453361A (en) Disk medium
Kishigami et al. An experimental investigation of contact characteristics between a slider and medium using the electrical resistance method
JPS56111152A (en) Detecting method of track shifting extent
JPS5683834A (en) Position measuring method of magnetic head and standard magnetic tape using in this method
JPS54145566A (en) Surface roughness measuring method using magnetic recording method
JPS54115118A (en) Recording type detecting method of magnetic tapes
JPS5528526A (en) Microprojection detecting circuit for magnetic disk
JPS52123603A (en) Inspection device of head for magnetic discs
JPS5665315A (en) Magnetic recording and inspecting system
JPS56165972A (en) Magnetic sheet recorder and reproducer
SU1390583A2 (ru) Устройство дл регистрации магнитных полей рассе ни
JPS5641504A (en) Information reproducing-recording device
JPS56127961A (en) Signal level measuring device
JPS57176506A (en) Recording system of tape recorder
JPS5760526A (en) Tracking device
JPS5315872A (en) Dew detector
JPS5525834A (en) Protective device for magnetic disk unit