ELECTRIC CIRCUIT

摘要

A hybrid or printed circuit is formed on a substrate (1) which comprises an iron-chromium- aluminium alloy which may also contain Yttrium and which forms a stable inert strongly adhering ceramic layer (5, 6) on its exposed surfaces when heated in an oxidising atmosphere. To produce a hybrid circuit a dielectric paste is printed on the ceramic surface (5) of the alloy to form a platform (9). Conductors (10, 11) are then printed on the dielectric platform (9) and fired. One or more component(s) (8) is/are then soldered to the conductors.