JPS5450439A - Manufacture of alumite substrate - Google Patents

Manufacture of alumite substrate

Info

Publication number
JPS5450439A
JPS5450439A JP11662077A JP11662077A JPS5450439A JP S5450439 A JPS5450439 A JP S5450439A JP 11662077 A JP11662077 A JP 11662077A JP 11662077 A JP11662077 A JP 11662077A JP S5450439 A JPS5450439 A JP S5450439A
Authority
JP
Japan
Prior art keywords
substrate
heat treatment
grinding process
oxide layer
press
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.)
Pending
Application number
JP11662077A
Other languages
Japanese (ja)
Inventor
Takehiko Sato
Katsuhiko Nakagawa
Masanori Okada
Wakatake Matsuda
Seiji Hattori
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
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
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, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP11662077A priority Critical patent/JPS5450439A/en
Publication of JPS5450439A publication Critical patent/JPS5450439A/en
Pending legal-status Critical Current

Links

Landscapes

  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Thin Magnetic Films (AREA)
  • Electrochemical Coating By Surface Reaction (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE: To obtain an Alumite substrate the aluminum oxide layer of which is not cracked at the time of heat treatment, by setting a press annealing process after an aluminum substrate grinding process.
CONSTITUTION: When an Al substrate formed by lathe working is press annealed, this process is carried out between an Al substrate surface grinding process and a polishing process or between the polishing process and an anodizing process. Thus, working strain generated again in the grinding process where strong external force is applied to the substrate can be relieved. Accordingly, an atomic reconfiguration phenomenon does not occur at the time of later heat treatment to magnetize iron oxide, whereby the occurence of cracking can be prevented in the resulting aluminum oxide layer
COPYRIGHT: (C)1979,JPO&Japio
JP11662077A 1977-09-30 1977-09-30 Manufacture of alumite substrate Pending JPS5450439A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11662077A JPS5450439A (en) 1977-09-30 1977-09-30 Manufacture of alumite substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11662077A JPS5450439A (en) 1977-09-30 1977-09-30 Manufacture of alumite substrate

Publications (1)

Publication Number Publication Date
JPS5450439A true JPS5450439A (en) 1979-04-20

Family

ID=14691686

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11662077A Pending JPS5450439A (en) 1977-09-30 1977-09-30 Manufacture of alumite substrate

Country Status (1)

Country Link
JP (1) JPS5450439A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108878127A (en) * 2018-07-02 2018-11-23 武汉科技大学 A kind of high-compactness soft magnetism composite iron core and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108878127A (en) * 2018-07-02 2018-11-23 武汉科技大学 A kind of high-compactness soft magnetism composite iron core and preparation method thereof
CN108878127B (en) * 2018-07-02 2021-04-02 武汉科技大学 High-density soft magnetic composite iron core and preparation method thereof

Similar Documents

Publication Publication Date Title
JPS5719324A (en) Production of steel for machine structural use for forging having fine structure at high temperature
JPS5450439A (en) Manufacture of alumite substrate
CH613337GA3 (en)
JPS5214374A (en) Treatment equpment for ion beam
JPS5614039A (en) Production of pan
JPS51118180A (en) Chuck equipped with angle indexing device
JPS5272318A (en) Preparation of nut of high tensile strength
JPS5719325A (en) Production of steel product
JPS5297458A (en) Surface treating method of heat radiation body for boiling and cooling
JPS53109474A (en) Manufacture for silicon water
JPS6478687A (en) Manufacture of aluminum covered steel plate
EP0147676A3 (en) Spherical microgrid
JPS53130057A (en) Inlay pattern body and forming method of the same
JPS5220317A (en) Shank material used as a tool for high speed steel
JPS53106500A (en) Fabricating method of semiconductor porcelain element
Vyatkin et al. Determination of the Anisotropy Coefficient of the Fermi Surface of Pb 1-xSnxSe Semiconductors
JPS53129976A (en) Inspection method for characteristics of semiconductor elements in semiconductor wafers
JPS529760A (en) Screw with strengthened neck against deformation
JPS544069A (en) Producing method of oxide film
JPS5313977A (en) Detecting method for surface flaw of high temperature
JPS5467555A (en) Fabrication of tungsten wire
JPS544062A (en) Wafer extender
JPS53130597A (en) Superfinishing method and apparatus
JPS51140470A (en) Method of cutting semiconductor crystal
JPS5288211A (en) Method and equipment for continuous treatment of magnetic material