Title:
CARBONACEOUS ACOUSTIC MATCHING LAYER AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2015/194602
Kind Code:
A1
Abstract:
Provided are: a carbonaceous acoustic matching layer which exhibits satisfactory mechanical strength, in which losses at a layer interface are suppressed as far as possible and in which the degree of variation in acoustic impedance in the thickness direction can be increased; and a method for producing same. The carbonaceous acoustic matching layer is obtained By dispersing filler particles, which are selected on the basis of the desired acoustic impedance of each layer, in a resin such as a furan resin, a phenol resin or a vinyl chloride resin, curing, laminating, and then carbonizing the resin by heating in a non-oxidizing atmosphere, amorphous carbon, which is obtained by the resin carbonization, is integrated across all the layers. The blending proportion of the filler particles is decided so that the difference in coefficient of linear contraction caused by the carbonization is at a minimum between adjacent layers.
Inventors:
OONO TOSHIKI (JP)
SATAKE ATSUNORI (JP)
SUZUKI TAKESHI (JP)
SATAKE ATSUNORI (JP)
SUZUKI TAKESHI (JP)
Application Number:
PCT/JP2015/067506
Publication Date:
December 23, 2015
Filing Date:
June 17, 2015
Export Citation:
Assignee:
MITSUBISHI PENCIL CO (JP)
International Classes:
H04R17/00; H04R31/00
Foreign References:
| JP2004045389A | 2004-02-12 | |||
| JP2007129554A | 2007-05-24 |
Other References:
See also references of EP 3160161A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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