Patents by Inventor Liexiang He

Liexiang He has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220153989
    Abstract: The present disclosure discloses a resin composition, and a prepreg, a laminate and a printed circuit board containing the same. The resin composition comprises 100 parts by weight of a halogen-free epoxy resin, 11-37 parts by weight of an active ester resin, and 40-66 parts by weight of a compound represented by Formula (I), wherein n is 2-15; Ac represents an acetyl group. The prepreg, laminate and printed circuit board prepared from such resin composition have a low dielectric loss factor, good flame retardancy, and also have high interlaminar adhesion and a low CTE.
    Type: Application
    Filed: April 8, 2019
    Publication date: May 19, 2022
    Inventors: Liexiang HE, Yongnian QI, Xianping ZENG, Zhongqiang YANG, Hualin PAN
  • Publication number: 20220135788
    Abstract: The present disclosure provides a resin composition, as well as a prepreg, a laminate and a printed circuit board containing the same. The resin composition comprises 48-54 parts by weight of a halogen-free epoxy resin, 16-31 parts by weight of a compound represented by Formula (I), wherein n is 2-15; Ac represents an acetyl group; and 15-32 parts by weight of a cyanate ester resin. The prepreg, laminate and printed circuit board prepared from the resin composition have a low coefficient of thermal expansion.
    Type: Application
    Filed: April 8, 2019
    Publication date: May 5, 2022
    Inventors: Liexiang HE, Yaode ZENG, Zhongqiang YANG, Yu YANG, Hualin PAN, Yongjing XU
  • Patent number: 10723875
    Abstract: The present disclosure relates to a halogen-free epoxy resin composition and a prepreg and a laminate using the same. The halogen-free epoxy resin composition comprises: (A) a halogen-free epoxy resin; (B) an active ester resin; and (C) a reactive phosphorous-containing flame retardant. The prepreg and laminate made from the halogen-free epoxy resin composition have the advantages of high inter-laminar adhesive force, low coefficient of thermal expansion and high heat-humidity resistance, and can achieve the halogen-free flame retardant purpose.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: July 28, 2020
    Assignee: SHENGYI TECHNOLOGY CO., LTD.
    Inventors: Xianping Zeng, Liexiang He
  • Publication number: 20200207976
    Abstract: Provided are an epoxy resin composition and a prepreg, laminated board and printed-circuit board comprising same. The epoxy resin composition comprises the following components: (A) 38-54 parts by weight of an epoxy resin comprising a DCPD structure; (B) 30-36 parts by weight of an active ester curing agent; and (C) 16-32 parts by weight of a cyanate resin, With the mutual cooperation and synergistic facilitation effects of the particular contents of the three essential components, the epoxy resin composition is obtained. Under the premise of having a high resistance to heat and humidity and a high heat resistance at the same time, the prepreg, laminated board and printed-circuit board made of the epoxy resin composition further have a low thermal expansion coefficient, a low water absorption rate and excellent dielectric properties.
    Type: Application
    Filed: September 14, 2016
    Publication date: July 2, 2020
    Applicants: Shengyi Technology Co., Ltd., Shengyi Technology Co., Ltd.
    Inventors: Xianping ZENG, Liexiang HE, Haosheng XU
  • Publication number: 20200087507
    Abstract: The present disclosure relates to a halogen-free epoxy resin composition and a prepreg and a laminate using the same. The halogen-free epoxy resin composition comprises: (A) a halogen-free epoxy resin; (B) an active ester resin; and (C) a reactive phosphorous-containing flame retardant. The prepreg and laminate made from the halogen-free epoxy resin composition have the advantages of high inter-laminar adhesive force, low coefficient of thermal expansion and high heat-humidity resistance, and can achieve the halogen-free flame retardant purpose.
    Type: Application
    Filed: August 14, 2017
    Publication date: March 19, 2020
    Inventors: Xianping ZENG, Liexiang HE
  • Patent number: 10544255
    Abstract: The present invention relates to an epoxy resin composition, comprising the following components: (A) an epoxy resin containing oxazolidinone structure having the structure of the formula (1), (B) an active ester curing agent, and (C) a curing accelerator. The epoxy composition, prepreg, laminate and printed circuit board prepared from such epoxy composition have the following features of low coefficient of thermal expansion, low dielectric loss factor Df less than or equal to 0.0084, low water absorption and excellent moisture and heat resistance.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: January 28, 2020
    Assignee: SHENGYI TECHNOLOGY CO., LTD.
    Inventors: Haosheng Xu, Xianping Zeng, Liexiang He
  • Patent number: 10208156
    Abstract: Provided in the present invention are an epoxy resin composition, prepreg and laminate using the same, the epoxy resin composition comprising the following components: (A) an imide modified epoxy resin; and (B) a crosslinking agent, the imide modified epoxy resin being an epoxy resin having a structure of formula (1) and/or formula (2). The prepreg and laminate prepared from the epoxy resin composition have a high glass-transition temperature, a low dielectric constant, a low dielectric loss factor, a high heat and humidity resistance, a high toughness and a good processability.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: February 19, 2019
    Assignee: SHENGYI TECHNOLOGY CO., LTD.
    Inventors: Xianping Zeng, Liexiang He, Yongjing Xu
  • Patent number: 9873789
    Abstract: Provided in the present invention are a halogen-free epoxy resin composition, prepreg and laminate using the same, the halogen-free epoxy resin composition comprising: (A) a halogen-free epoxy resin; (B) a crosslinking agent; and (C) a phosphorous-containing phenolic resin, the phosphorous-containing phenolic resin being formed by a synthesis of phenol and formaldehyde with dicyclopentadiene phenol, and being substituted by 9,10-dihydro-9-oxa-10-phosphapheanthrene-10-oxide or a derivative thereof. The prepreg and laminate prepared from the halogen-free epoxy resin composition have a high heat resistance, a low dielectric constant, a low dielectric loss factor and a low water absorption rate, and achieve halogen-free flame retardance.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: January 23, 2018
    Assignee: SHENGYI TECHNOLOGY CO., LTD.
    Inventors: Xianping Zeng, Liexiang He
  • Publication number: 20180016387
    Abstract: The present invention relates to an epoxy resin composition, comprising the following components: (A) an epoxy resin containing oxazolidinone structure having the structure of the formula (1), (B) an active ester curing agent, and (C) a curing accelerator. The epoxy composition, prepreg, laminate and printed circuit board prepared from such epoxy composition have the following features of low coefficient of thermal expansion, low dielectric loss factor Df less than or equal to 0.0084, low water absorption and excellent moisture and heat resistance.
    Type: Application
    Filed: March 29, 2016
    Publication date: January 18, 2018
    Inventors: Haosheng Xu, Xianping Zeng, Liexiang He
  • Publication number: 20170283609
    Abstract: Provided in the present invention are a halogen-free epoxy resin composition, prepreg and laminate using the same, the halogen-free epoxy resin composition comprising: (A) a halogen-free epoxy resin; (B) a crosslinking agent; and (C) a phosphorous-containing phenolic resin, the phosphorous-containing phenolic resin being formed by a synthesis of phenol and formaldehyde with dicyclopentadiene phenol, and being substituted by 9,10-dihydro-9-oxa-10-phosphapheanthrene-10-oxide or a derivative thereof. The prepreg and laminate prepared from the halogen-free epoxy resin composition have a high heat resistance, a low dielectric constant, a low dielectric loss factor and a low water absorption rate, and achieve halogen-free flame retardance.
    Type: Application
    Filed: June 1, 2015
    Publication date: October 5, 2017
    Inventors: Xianping Zeng, Liexiang He
  • Publication number: 20170002131
    Abstract: Provided in the present invention are an epoxy resin composition, prepreg and laminate using the same, the epoxy resin composition comprising the following components: (A) an imide modified epoxy resin; and (B) a crosslinking agent, the imide modified epoxy resin being an epoxy resin having a structure of formula (1) and/or formula (2). The prepreg and laminate prepared from the epoxy resin composition have a high glass-transition temperature, a low dielectric constant, a low dielectric loss factor, a high heat and humidity resistance, a high toughness and a good processability.
    Type: Application
    Filed: June 1, 2015
    Publication date: January 5, 2017
    Inventors: Xianping Zeng, Liexiang He, Yongjing Xu