High speed connector with matched impedance

摘要

An electrical connector (50) includes a first housing member (52), a second housing member (60) attached to the first housing member by a cap (68), a plurality of contacts (64) and a plurality of grounding buses (66) assembled to the second housing member and a plurality of printed substrates (10) assembled to the first and second housing members. Each printed substrate has a first edge (28) adjacent a front face (56) of the first housing member, a perpendicular second edge (30) received in a slot (62) of the second housing member. The printed substrate has a plurality of couples of traces (14) and a plurality of grounding coatings (22) in on a first surface thereof and each grounding coating is located between two adjacent couples of traces. The printed substrate further has a row of first conductive pads (16) adjacent the first edge and a row of second conductive pads (18) adjacent the second edge and both rows are on the first surface. The first and the second conductive pads are electrically interconnected via the conductive traces. Each first conductive pad includes a first section (34) connected to the conductive trace and a second section (38) close to the first edge. The first section is slimmer than the second section for controlling the impedance of the route of the conductive pads and the conductive trace. The printed substrate has a grounding coating (24) on an opposite second surface (26) for controlling the impedance of the route of the trace and the conductive pads.