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Patent Searching and Data


Title:
METHOD FOR FORMING ALUMINUM SURFACE SELENIUM TREATED NANO COATING FOR IMPROVING LOW FREQUENCY EXTENSION OF EARPHONE
Document Type and Number:
WIPO Patent Application WO/2019/047082
Kind Code:
A1
Abstract:
Provided is a method for forming an aluminum surface selenium treated nano coating for improving low frequency extension of an earphone. The method comprises: immersing an aluminum film in a water mixed solution of glucose and 2-chloro-4-nitrobenzene seleninic acid for 12 to 24 hours at an ambient temperature of 40 to 90 ° C, and then calcining the such treated aluminum film 500 to 600 ° C for 2 to 8 hours. The method is simple and easy to implement, and can greatly improve the low frequency extension of the earphone while using a cheap and easy-to-obtain aluminum film.

Inventors:
YU LEI (CN)
LU ZHAOHUI (CN)
YANG YUFAN (CN)
LU ZHAOYANG (CN)
Application Number:
PCT/CN2017/100784
Publication Date:
March 14, 2019
Filing Date:
September 06, 2017
Export Citation:
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Assignee:
SHENZHEN TONGFUDA ELECTRONIC TECH CO LTD (CN)
UNIV YANGZHOU (CN)
International Classes:
H04R31/00; H04R7/00; H04R7/02; H04R7/04
Foreign References:
CN103957494A2014-07-30
CN1100883A1995-03-29
CN102187687A2011-09-14
CN103067828A2013-04-24
JPS5685993A1981-07-13
JPS5662499A1981-05-28
Attorney, Agent or Firm:
NOZO & ASSOCIATES et al. (CN)
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