Title:
ULTRA-PURE SPHERE-LIKE β SILICON NITRIDE POWDER WITH LOW RADIOACTIVITY, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/186881
Kind Code:
A1
Abstract:
Disclosed is an ultra-pure sphere-like β silicon nitride powder with a low radioactivity, wherein the degree of sphericity is between 0.5-0.99, the uranium impurity content is < 5 ppb, the thorium impurity content is < 5 ppb, and the particle size ranges between 0.5 μm–50 μm. As a filler of an electronic encapsulation material, β silicon nitride powder is suitable for a memory semiconductor encapsulation material with a high thermal conductivity.
Inventors:
CHENG HUIMING (CN)
CUI WEI (CN)
SUN SIYUAN (CN)
JIA ZAIHUI (CN)
ZOU YIFENG (CN)
CUI WEI (CN)
SUN SIYUAN (CN)
JIA ZAIHUI (CN)
ZOU YIFENG (CN)
Application Number:
PCT/CN2019/129455
Publication Date:
September 24, 2020
Filing Date:
December 27, 2019
Export Citation:
Assignee:
QINGDAO CUP NEW MAT CO LTD (CN)
International Classes:
C01B21/068; C08K7/18; C08K9/06; C08L63/00; C08L83/04; C09K5/14
Foreign References:
| CN109761205A | 2019-05-17 | |||
| CN1935926A | 2007-03-28 | |||
| CN1935926A | 2007-03-28 | |||
| CN109095443A | 2018-12-28 | |||
| CN103087556A | 2013-05-08 | |||
| CN105776158A | 2016-07-20 | |||
| CN201910205390A | 2019-03-18 |
Other References:
See also references of EP 3915935A4
Attorney, Agent or Firm:
BEIJING ORIGINTELLIGENCE IP LAW FIRM (CN)
Download PDF: