GB1510658A - Device for testing magnetic thin layers - Google Patents

Device for testing magnetic thin layers

Info

Publication number
GB1510658A
GB1510658A GB21804/75A GB2180475A GB1510658A GB 1510658 A GB1510658 A GB 1510658A GB 21804/75 A GB21804/75 A GB 21804/75A GB 2180475 A GB2180475 A GB 2180475A GB 1510658 A GB1510658 A GB 1510658A
Authority
GB
United Kingdom
Prior art keywords
film
tape
magnetic
pattern
defect
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.)
Expired
Application number
GB21804/75A
Other languages
English (en)
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1510658A publication Critical patent/GB1510658A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
    • G01R33/1207—Testing individual magnetic storage devices, e.g. records carriers or digital storage elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/10—Plotting field distribution ; Measuring field distribution

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Immunology (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Pathology (AREA)
  • Measuring Magnetic Variables (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Thin Magnetic Films (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
GB21804/75A 1974-05-24 1975-05-21 Device for testing magnetic thin layers Expired GB1510658A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7406964A NL7406964A (nl) 1974-05-24 1974-05-24 Inrichting voor het inspecteren van magne- tische kristallen.

Publications (1)

Publication Number Publication Date
GB1510658A true GB1510658A (en) 1978-05-10

Family

ID=19821423

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21804/75A Expired GB1510658A (en) 1974-05-24 1975-05-21 Device for testing magnetic thin layers

Country Status (7)

Country Link
US (1) US3987363A (enExample)
JP (1) JPS576540B2 (enExample)
CA (1) CA1015032A (enExample)
DE (1) DE2521779A1 (enExample)
FR (1) FR2272401A1 (enExample)
GB (1) GB1510658A (enExample)
NL (1) NL7406964A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3423958A1 (de) * 1983-07-05 1985-01-17 Gerald L. Issaquash Wash. Fitzpatrick Anordnung und verfahren zur bestimmung von rissen, blasen oder sonstigen fehlstellen in einem target-material

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2458130A1 (fr) * 1979-06-01 1980-12-26 Commissariat Energie Atomique Machine de test de memoires a bulles
JPS60117135U (ja) * 1984-01-18 1985-08-08 積水化成品工業株式会社 収縮スリ−ブ形成用シ−ト
US5565772A (en) * 1994-11-30 1996-10-15 Eastman Kodak Company High sensitivity magnetic viewer using anhysteretic transfer for viewing weak magnetic patterns
WO2011022516A2 (en) * 2009-08-18 2011-02-24 Cooper Technologies Company Sinusoidal alternating current ballast for fluorescent emergency lighting

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7301931A (enExample) * 1973-02-12 1974-08-14

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3423958A1 (de) * 1983-07-05 1985-01-17 Gerald L. Issaquash Wash. Fitzpatrick Anordnung und verfahren zur bestimmung von rissen, blasen oder sonstigen fehlstellen in einem target-material
GB2143042A (en) * 1983-07-05 1985-01-30 Gerald L Fitzpatrick Flaw imaging in ferrous and nonferrous materials using magneto-optic visualization

Also Published As

Publication number Publication date
JPS512482A (enExample) 1976-01-10
CA1015032A (en) 1977-08-02
NL7406964A (nl) 1975-11-26
US3987363A (en) 1976-10-19
DE2521779A1 (de) 1975-12-04
FR2272401A1 (enExample) 1975-12-19
JPS576540B2 (enExample) 1982-02-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee