Board-to-board connector assembly

A connector assembly comprising:

• a first connector including a plurality of first plug contacts and a plurality of first receptacle contacts each having a first elastic piece, the plurality of first plug contacts and the plurality of first receptacle contacts being alternately arranged in a grid array;
• and
• a second connector including a plurality of second plug contacts and a plurality of second receptacle contacts each having a second elastic piece, the plurality of second plug contacts and the plurality of second receptacle contacts being alternately arranged in a grid array, wherein
• the plurality of first plug contacts are each brought into contact with the second elastic piece of the corresponding second receptacle contact in accordance with elastic deformation of the second elastic piece,
• the plurality of second plug contacts are each brought into contact with the first elastic piece of the corresponding first receptacle contact in accordance with elastic deformation of the first elastic piece, and
• a direction of the elastic deformation of the first elastic piece is different from a direction of the elastic deformation of the second elastic piece in a state in which the first connector and the second connector are mated, and in the state in which the first connector and the second connector are mated, the first elastic piece is elastically deformed in a direction perpendicular to a thickness direction of the first receptacle contacts, and the second elastic piece is elastically deformed in a direction perpendicular to a thickness direction of the second receptacle contacts.