Current-limiting thin film termination for capacitors

Details Current-limiting thin film termination for capacitors Current-limiting thin film termination for capacitors

1987-05-15

1988-04-26

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

29 2542, 361321, H01G 114, H01G 700, H01G 410

Patent

active

047408634

ABSTRACT:
A small multilayer capacitor, such as an MLC capacitor, has in one of its end terminations a passivation layer surrounded by nested sputter-coated metallization films to provide a safeguarding feature so that the capacitor will not fail short. A process for providing the terminations at the ends of chips for such small MLC capacitors includes applying at least three nested thin films of metallization at the opposite ends of each chip and over the surface of the chip between the ends, and forming the passivation layer before applying the outer nested films, and finally removing a portion of thin films of metallization material intermediate the ends, to provide an MLC capacitor having proper metallized end terminations. Preferably, the thin films are applied to cover the entire surface of each chip by sputtering thin film material onto a batch of tumbling chips.

REFERENCES:
patent: 3549956 (1970-12-01), Polie
patent: 4458294 (1984-07-01), Womack
patent: 4533975 (1985-08-01), Bill
patent: 4555746 (1985-11-01), Mochizuki et al.
patent: 4604676 (1986-08-01), Senda et al.

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