An electrical device is described herein which has an input impedance of substantially constant phase angle over a limited frequency range. It consists of a distributed circuit having a capacitive and resistive medium between two electrodes, of appropriate properties. Implementations can use thin film techniques or monolythic techniques.
An electronic component with a substrate (1, 31) of which a surface (4, 34) is provided with a thin-film structure with passive elements (5, 35), with a resistor (6, 36) formed in a layer of resistor material (7, 37), and with a capacitor having a lower electrode (9, 39) formed in an electrode layer (10, 40) provided on the surface, a dielectric (11, 41) formed by a layer of insulating material (12, 41) provided on the lower electrode, and an upper electrode (13, 43) formed in an electrode layer (14, 44) provided on the dielectric. One of the electrodes (9, 43) of the capacitor (8, 38) is formed in an electrode layer (10, 44) which is constructed as a dual layer (19-21, 49-51), of which the layer of resistor material (7, 37) in which also the resistor (6, 36) is formed constitutes a first partial layer (19, 49), on which a layer of conductive material (20, 55) is provided which constitutes the other, second partial layer (21, 51). The capacitor has a comparatively low series resistance owing to the use of the dual layer.
