Other

Littlefuse Ireland Development Company Limited

Ramesh Raghavendra

Clive A Randall

Neil McLoughlin

Dinesh Kumar Agrawal

Balasubramaniam Vaidhyanathan

Amanda Lou Baker

An IPD has a varistor of electrodes and a ZnO dielectric. A capacitor includes electrodes and a dielectric that has oxides of bismuth, magnesium, and niobium having a pyrochlore structure of type A B O . The materials are applied as wet layers and are sintered for integrated production.

Integrated passive device and method for producing such a device

Varistors are produced by pressing ceramic ZnO powder to provide discs, sintering the discs with microwave radiation, and firing outer electrodes with microwave radiation. The sintering has a maximum plateau temperature of 1000&deg; C. to 1300&deg; C. and the duration for ramping to this temperature and maintenance at this temperature is 120 to 180 minutes. These parameters also apply for multi-layer varistors with inner electrodes. The outer electrodes are fired at a maximum plateau temperature of 550&deg; C. to 820&deg; C. for a total duration of 40 to 45 minutes.

Production of passive devices

Growing community of inventors

Dundalk, Ireland

Ramesh Raghavendra