COOL PLASMA ACTIVATED SURFACE IN SILICON WAFER DIRECT BONDING TECHNOLOGY G.-L. SUN, J. ZHAN, Q.-Y. TONG, S.-J. XIE, Y.-M. CAI and S.-J. LU J. Phys. Colloques, 49 C4 (1988) C4-79-C4-82 DOI: 10.1051/jphyscol:1988416