1. K. Mukai, A. Saiki, IEEE J. Solid-State Circuits
SC-13 (1978) 462.
2. K. Sato, S. Harada, IEEE Trans, Hybrid and Packaging
PHP-176 (1973).
3. Hitachi Chemical Catalogue (Technical Data Sheet of Hitachi Chemical).
4. Technical data sheet of the corresponding company.
5. Ibid.