Electrical connector having guide-in arrangement

An electrical connector assembly comprising:

• a memory module comprising a first side portion, an opposite second side portion, and a plurality of conductive pads, the first side portion comprising a side engaging section;
• and
• an electrical connector comprising an insulative housing comprising a first end, an opposite second end and a slot extending from the first end to the second end, and a plurality of electrical terminals mounted to the insulative housing, the first end comprising a stationary supporting section engageable with the side engaging section to support the memory module to rotate thereabout to mate the conductive pads with the electrical terminals sequentially from the first end to the second end, each electrical terminal mechanically contacted with and electrically connected with one corresponding conductive pad in the course of mating the memory module with the electrical connector;
• wherein each conductive pad defines a track from an initial point at which the electrical terminal firstly contacts therewith to a final point at which the electrical terminal finally mated therewith in the course of mating the memory module with the electrical connector;
• wherein the initial point and the final point define a first distance Tw therebetween along a first direction along which the conductive pads are arranged on the memory module and wherein the conductive pad defines along the first direction a width no less than the first distance Tw:
• wherein the initial point and the final point define a second distance TH therebetween along a second direction perpendicular to the first direction and wherein the conductive pad defines along the second direction a height no less than the second distance TH;
• wherein the final point of a first one of the conductive pads of the memory module measured from the first side portion defines, along the first direction, a third distance Z with respect to a lateral end of the first side portion, the third distance Z being substantially equal to a distance defined between a first one of the electrical terminals of the electrical connector and the supporting section;
• wherein the memory module comprises a lower end defining a fourth distance K with respect to a pivot point about which the memory module rotates, and wherein the slot comprises a bottom face defining, with respect to the pivot point, a distance substantially equal to the fourth distance K;
• wherein the first to the fourth distances are subject to a mathematical relationship therebetween:
• Tw2−TH2=2×Z×Tw−2×K×TH.