Polymer Bulletin

, Volume 25, Issue 5, pp 559–565

Synthesis of high purity o-cresol formaldehyde novolac epoxy resins

  • Chun-Shan Wang
  • Zeng-Kun Liao

DOI: 10.1007/BF00293514

Cite this article as:
Wang, CS. & Liao, ZK. Polymer Bulletin (1991) 25: 559. doi:10.1007/BF00293514


The content of total chlorine in o-cresol formaldehyde novolac epoxy resin (CNE), the main resin component for encapsulation formulation, affects the reliability of semi-conductor device greatly and it is one of the major criteria used by the electronic industry in measuring the quality of resins. A new process which synthesizes a high purity CNE with less than 300 ppm total chlorine content has been developed. This high purity resin has provided an extended device life under the accelerated stress test condition.


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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Chun-Shan Wang
    • 1
  • Zeng-Kun Liao
    • 2
  1. 1.Department of Chemical EngineeringNational Cheng Kung UniversityTainanTaiwan, Republic of China
  2. 2.Resins Research, Dow Chemical CompanyFreeportUSA

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