| 摘要 |
<p>1. Method of producing a base for the mounting of a semiconductor chip (2) in accordance with the technique of inverted soldering, the semiconductor chip being fixed on the base through at least one electrode metallization (3, 4, 5) facing at least one corresponding metallization (16, 17, 18) on the base, said base (14) comprising at least one opening (15) filled with a conductive material (19) forming a connection means, the method being characterized in that it comprises the sequence of the following operations : - on a sheet of monocrystalline material (14) which is sensitive to an anisotropic chemical attack and having a resistivity such that rho vepsiln omega mch> 1 wherein rho is the resistivity of the material, vepsiln its dielectric constant and omega being the operating angular frequency, and which is perfectly plane, metallizations (16, 17, 18) for the positioning of the semiconductor chip are deposited and engraved on a first face ; - a mask is deposited and engraved on the second face of the sheet in order to define the zone of chemical attack vertically beneath at least one (16) of the metallizations carried by the first face of the sheet ; - engraving at least one opening (15) through the entire thickness of the sheet by anisotropic chemical attack in a humid or dry environment, the chemical attack abutting against the metallization (16) previously deposited on the first face of the sheet ; - electrolytic filling of the opening (15) obtained beneath one metallization (16) with a metal (19) of good thermal and electrical conductivity, the metallization (16) acting as an electrode for the electrolytic filling of the opening.</p> |
