U.S. Philips Corporation

Antonius J Eijkelenkamp

Gijsbertus De With

Willem R De Wild

Gerardus J Rientjes

Jan H Held

A multilayer ceramic capacitor characterized by a stack of alternate layers of dielectric oxidic ceramic material and of electrode layers consisting of a mixture of a metal having a high electric conductivity and ceramic particles of a material having a sintering temperature which is above the sintering temperature of the oxidic ceramic material of the dielectric layers. As a result of this electrode layer composition, the capacitor can be manufactured by means of a uniaxial pressure sintering process in which the stack is sintered while simultaneously applying pressure in the direction transverse to the plane of the layers. This leads to dielectric layers which are substantially free from pores and have a thickness of at most 20 .mu.m.

Multilayer ceramic capacitor

An electrolytic capacitor the electrolyte solution of which consists of a solution of salt of an amine of acetic acid and boric acid between certain ratio limits, in one or more mono-alkylated or di-alkylated amides or a carboxylic acid having 1, 2 or 3 carbon atoms. Instead of acetic acid, propionic acid may also be used. These solutions have a conductivty of at least 1 mS/cm at 25.degree. C. and may be used up to high operating voltages with low electric losses. They are chemically stable up to high temperatures, as a result of which the capacitor is electrically stable.

Growing community of inventors

Eindhoven, Netherlands

Antonius J Eijkelenkamp