JPS5660195A - Diaphragm for electroacoustic transducer and its manufacture - Google Patents

Diaphragm for electroacoustic transducer and its manufacture

Info

Publication number
JPS5660195A
JPS5660195A JP13611179A JP13611179A JPS5660195A JP S5660195 A JPS5660195 A JP S5660195A JP 13611179 A JP13611179 A JP 13611179A JP 13611179 A JP13611179 A JP 13611179A JP S5660195 A JPS5660195 A JP S5660195A
Authority
JP
Japan
Prior art keywords
boron
amorphous
titanium
coating layer
layer
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
JP13611179A
Other languages
Japanese (ja)
Inventor
Tsutomu Hiroki
Yoshiro Shimamune
Minetaro Hirose
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13611179A priority Critical patent/JPS5660195A/en
Publication of JPS5660195A publication Critical patent/JPS5660195A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To make it possible to obtain sufficient performance by relatively-low- temperature and short-time procession without the need for power removal by changing an amorphous boron coating layer, applied to the surface of a diaphragm base made of titanium, into a hard film. CONSTITUTION:The surface of diaphragm base 4 made of titanium is applied with amorphous boron to form a coating layer of it. Diaphragm base 4 having the amorphous boron coating layer like this is contained in vacuum container 7. Alkali earth metal powder 6 is also placed in vacuum container 7, which is evacuated and heated. When magnesium powder is used as earth metal powder 6, container 7 is filled with magnesium vapor at a heating temperature of about 1,000 deg.C. Then, the amorphous coating layer has the gap of amorphous boron powder filled with boron atoms carried by the magnesium vapor and changes into boron film 15 of glass. In titanium layer 1, boron atoms are diffused and boron diffused layer 3 is formed on the surface of titanium layer 1.
JP13611179A 1979-10-22 1979-10-22 Diaphragm for electroacoustic transducer and its manufacture Pending JPS5660195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13611179A JPS5660195A (en) 1979-10-22 1979-10-22 Diaphragm for electroacoustic transducer and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13611179A JPS5660195A (en) 1979-10-22 1979-10-22 Diaphragm for electroacoustic transducer and its manufacture

Publications (1)

Publication Number Publication Date
JPS5660195A true JPS5660195A (en) 1981-05-23

Family

ID=15167542

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13611179A Pending JPS5660195A (en) 1979-10-22 1979-10-22 Diaphragm for electroacoustic transducer and its manufacture

Country Status (1)

Country Link
JP (1) JPS5660195A (en)

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