Socket connector

A socket connector adapted to connect an electronic device to a circuit board, the circuit board having a thermal expansion coefficient, the socket connector comprising:

• a base having a bottom face and a top face and defining a plurality of first holes each receiving a board-engaging pin therein, each said board-engaging pin extending beyond the top face of the base;
• a cover fixed to the base and defining an interior space therebetween, the cover defining a plurality of second holes corresponding to the first holes of the base and adapted to receive terminal pins of the electronic device, the terminal pins partially extending into the interior space;
• a slider movably received in the interior space between the base and the cover, a plurality of slots being defined in the slider corresponding to the first and second holes for partially receiving end sections of the corresponding board-engaging pins and terminal pins therein with each board-engaging pin and the corresponding terminal pin being spaced from each other, each slot receiving and retaining a conductive contact element therein, the contact element being movable with the slider for being selectively engageable with both the board-engaging pin and the terminal pin thereby forming electrical connection therebetween;
• and
• a substrate board made of a material having the same thermal expansion coefficient as the circuit board, the substrate board having a top face to which the bottom face of the base is mounted and a bottom face, a number of top conductive traces being formed on the top face of the substrate board and soldered to the corresponding board-engaging pins, a number of bottom conductive traces being formed on the bottom face of the substrate board and electrically connected to the corresponding top conductive trace, each bottom trace being adapted to support and electrically connect a solder ball;
• wherein.
• a hole is defined in the substrate board for electrically connecting each top conductive trace to the corresponding bottom conductive trace;
• wherein
• each first hole comprises an enlarged opening formed in the bottom face of the base, the enlarged opening being adapted to facilitate insertion of the corresponding board-engaging pin therein and adapted to accommodate solder therein for soldering the board-engaging pin to the corresponding top conductive trace of the substrate board;
• wherein
• the enlarged opening has a conic configuration.