DIMM connector region vias and routing
A dual in-line memory module (DIMM) connector system is provided. The DIMM connector system includes a motherboard, a DIMM card and a connector by which the DIMM card is coupled with the motherboard. The motherboard includes a printed circuit board (PCB) formed of a mid-loss dielectric constant material, signal pads that are thinner than ground pads, ground pads disposed proximate to signal pads, signal vias connected to distal edges of signal pads and shared antipads. The DIMM card includes a printed circuit board (PCB) formed of a mid-loss dielectric constant material, signal pads that are thinner than ground pads, signal vias connected to distal edges of signal pads and shared antipads for respective pairs of signal vias.
1. A method of manufacturing a dual in-line memory module (DIMM) connector system, comprising a motherboard, a DIMM card and a connector by which the DIMM card is coupled with the motherboard, the method comprising:
selecting, as a printed circuit board (PCB) material for the motherboard, FR4061 as a mid-loss dielectric constant material;
thinning signal pads of the motherboard to be about 25% as wide as ground pad of the motherboard or thinning signal pads of the DIMM card to be about 25% as wide as ground pads of the DIMM card;
modifying distal ends of the signal pads of the motherboard to comprise flat edges and a single convex curved edge terminating at the flat edges;
disposing the ground pads of the motherboard proximate to the signal pads of the motherboard;
connecting signal vias to distal edges of the signal pads of the DIMM card, the signal vias having surface mounts (SMTs) extending therefrom and the SMTs having single angular portions; and
forming shared antipads of the motherboard to be rectangular and forming shared antipads of the DIMM card to be elliptical.