Abstract
Thin-film hybrid circuits are of prime interest due to their improved temperature stability and reduced parasitics. Sputtered tantalum films and vacuum-evaporatod aluminium films are used to fabricate thin-film resistors and capacitors on passive substrates. Some of their physical properties are investigated in order to use them in electronic circuits. As an illustrative application of these RC networks, the following circuits are built using discrete transistors: thin-film ladder networks for digital-to-analogue converters, resistor-transistor logic circuits, a Schmitt trigger circuit and an astable multivibrator circuit. The design procedure, fabrication details and result of testing are discussed at length for ladder networks which are of special interest in digital communication. The paper concludes by giving details of our proposed activities in this field.
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