Patent ID: 7494346

Claim:
A board-to-board connector assembly, comprising: a receptacle having: a receptacle housing having a fundus, two first sidewalls protruding upward from two opposite sides of the fundus, and two second sidewalls protruding upward from two opposite ends of the fundus, a recess being formed among the fundus and the sidewalls, a plurality of female cavities being defined in the first sidewalls, each of the female cavities having a first branch cavity defined transversely in the top of the first sidewall, a second branch cavity defined in an inner side of the first sidewall and communicating with the first branch cavity and the recess, and a third branch cavity extending downward and through the first sidewall from the first branch cavity, the second sidewall being disposed between the end of the two first sidewalls and lower than the first sidewall, two ends of the receptacle housing defining a first fixing cavity respectively for receiving a first fixing contact therein, the first fixing cavity having a basic cavity defined transversely in the second sidewall and the end of the two first sidewalls and passing through the top of the second sidewall and two middle cavities defined longitudinally in the top of the second sidewall and intersecting with the basic cavity, and a plurality of female contacts received in the respective female cavities of the receptacle housing, each female contact having a base extending transversely, one end of the base extending downward and then bend upward to form a contacting portion, the base further having a portion extending downward to form a soldering portion, the bottom of the soldering portion bending sideward to form a soldering head adapted to be soldered on a printed circuit board, wherein the base is received in the first branch cavity, the contacting portion is received in the second branch cavity and stretches into the recess, and the soldering portion is received in the third branch cavity; and a plug having a plug housing engaging the recess of the receptacle housing and male contacts received in the plug housing and electrically contacting the contacting portions of the female contacts.