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Esca and Sims Study of the Tetrabromobisphenol A Flame Retardant Diffusion to the Metal-Encapsulating Resin Interface

Published online by Cambridge University Press:  21 February 2011

Alberto Torrisi ,
Angelo Cavallaro ,
Antonio Perniciaro ,
Giuseppe Ferla  and
Salvatore Pignataro
Alberto Torrisi
Affiliation:
Dipartimento di Scienze Chimiche, Viale A. Doria 6, 95125 Catania, Italy.
Angelo Cavallaro
Affiliation:
SGS Microelettronica, Stradale di Primosole 50, 95100 Catania, Italy.
Antonio Perniciaro
Affiliation:
SGS Microelettronica, Stradale di Primosole 50, 95100 Catania, Italy.
Giuseppe Ferla
Affiliation:
SGS Microelettronica, Stradale di Primosole 50, 95100 Catania, Italy.
Salvatore Pignataro
Affiliation:
Dipartimento di Scienze Chimiche, Viale A. Doria 6, 95125 Catania, Italy.
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Abstract

Epoxy resins of novolac type were molded to real copper and nickel plated copper framesin plant conditions. Three resins, formulated with different amount of tetrabromobisphenol A flame retardant, were used. The samples were stored at 200°C and then mechanically fractured at given time intervals. The surfaces obtained in the fracture have been analyzed by ESCA and Ga+ excited static and imaging SIMS. The kinetics of migration of the flame retardant to the resinmetal interfacial zone have been followed. The process was found to be diffusion controlled. Evidence of a redox reaction between the copper oxides found on the surface of the copper frame and the tetrabromobisphenol A was obtained. A copper diffusion through the Ni plating was observed in the case of the nickel plated frames. This phenomenon is most important at the point on the frame where the bromine concentration is higher.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 108 , 1987 , 365
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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