Summary
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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References
A.R.Pinder, Synthesis 6, 425 (1980).
European patent appl. EP 176482 (1986).
Japan KoKai Tokkyo Koho JP 61-252221 (1986).
Japan Kokai Tokkyo Koho JP 61-252222 (1986).
C.L. Liotta and H.P. Harris, J. Am. Chem. Soc. 96(7), 2250 (1974).
J.I. Hayami, N. Ono and A. Kaji, Tetrahedron Letter 31, 2727 (1970).
J.I. Hayami, N. Ono and A. Kaji, Bull. Chem. Soc. Japan 44, 1369: 44, 1628 (1971)
R.A. Bartsch, J. Org. Chem. 35(4), 1023 (1970).
U.S. Patent 4447598 (1984).
U.S. Patent 4585838 (1986).
W.W. Epstein and F.W. Sweat, Chem. Rev. 67(3),247(1967)
C.M. Starks, J. Am. Chem. Soc. 93(1), 195 (1971).
F. Rolla, J. Org. Chem. 46, 3909 (1981).
S. Kim, C. Oh, J. S. Ko, K.H. Ahn and Y.J. Kim, J. Org. Chem. 50(11). 1927 (1984).
F.L. Cook, C.W. Bowers and C.L. Liotta, J. Org. Chem. 39(23), 3416 (1974).
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Wang, CS., Liao, ZK. Synthesis of high purity o-cresol formaldehyde novolac epoxy resins. Polymer Bulletin 25, 559–565 (1991). https://doi.org/10.1007/BF00293514
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DOI: https://doi.org/10.1007/BF00293514