Surface-mounting type electronic circuit unit suitable for miniaturization and easy to manufacture

Abstract

To provide a surface-mounting type electronic circuit unit provided with a shield, suitable for miniaturization and easy to manufacture, a circuit element such as a resistor and a capacitor and a conductive pattern are thinly formed on a square and flat substrate made of alumina, a semiconductor bare chip such as a transistor is bonded via wire and a part of the conductive pattern is exposed at the edge of the substrate so as to form an earth pattern. An insulating passivation layer is formed in a region except the earth pattern of the substrate, the circuit element and the semiconductor bare chip are covered with the insulating passivation layer and the upper surface of the insulating passivation layer is flattened by pressing and others. A metallic shield is bonded on the upper surface of the insulating passivation layer using a conductive adhesive, and the shield and the earth pattern are electrically connected via the conductive adhesive by also applying the conductive adhesive on the earth pattern.

Dependencies are inferred from the claim text.