| 摘要 |
PCT No. PCT/IT87/00076 Sec. 371 Date Mar. 24, 1989 Sec. 102(e) Date Mar. 24, 1989 PCT Filed Jul. 31, 1987 PCT Pub. No. WO88/00984 PCT Pub. Date Feb. 11, 1988.The formation of three layers of overlapped metals having different thicknesses is provided on a dielectric film, these layers being a very thin layer of silver, copper or their alloys, a second zinc layer provided with a reinforcement and a third layer of aluminium or aluminium alloy comprising a percentage of titanium, silicon or cadmium lower than 1%. The layers are obtained by depositing metal vapours in a chamber at a pressure of about 10-4 torr. The apparatus comprises a vacuum chamber (10) divided in two sections (11 and 12), section (11) being a film's transit area, while in section (12) separate evaporating devices for the three metals are foreseen. Particularly, a resistive bar is foreseen for melting silver, copper or their alloys, a radiation furnace for zinc and a heated cylindric bar for aluminium or aluminium alloys.
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