Shielded stacking electrical connector assembly

An electrical connector assembly for interconnecting a plurality of circuit boards (10, 12) in a stacked parallel configuration, each of said circuit boards being formed with an array of apertures (35) therethrough which are located on the boards so that the apertures of said plurality of circuit boards are mutually registered when said plurality of circuit boards are positioned in said stacked parallel configuration, said electrical connector assembly comprising:

• a receptacle member (14) including:
• a housing (18) having a mating face (20), a mounting face (22), a transverse wall (24) extending along said mounting face, an inner body portion (26), and at least one outer side wall (28) extending from said mounting face to said mating face and defining at least one elongated cavity (30) between said inner body portion and said at least one outer side wall;
• means (32) for mounting said housing to a first of said plurality of circuit boards with said mounting face engaging a first surface of said first circuit board;
• said inner body portion (26) having a plurality of terminal-receiving passageways (34) extending therethrough from said mating face to said mounting face, each of said passageways being aligned with a respective one of the apertures (35) through said first circuit board when said housing is mounted to said first circuit board;
• a plurality of first contact terminal members (36) each disposed in a respective terminal-receiving passageway (34) of said inner body portion (26), each of said first contact terminal members (36) having an elongated pin portion (38) extending beyond said mounting face and through a respective aperture of said first circuit board when said housing is mounted to said first circuit board, each of said first contact terminal members (36) further having a pin receiving portion (40) exposed along said mating face for mating with a corresponding pin portion (38) from a second receptacle member mounted to a second of said plurality of circuit boards;
• and
• a plurality of second contact terminal members (42) disposed in said transverse wall (24) and each having a terminal portion (44) extending into said at least one elongated cavity (30);
• and
• a pin shroud member (16) including:
• a housing (46) having a mating face (48), a mounting face (50), and at least one wall (52) extending from said mating face to said mounting face, said at least one wall surrounding a defined space;
• means (58) for mounting said pin shroud member housing to said first circuit board with said mounting face of said pin shroud member housing engaging a second surface of said first circuit board and positioned so that the pin portions (38) of said first contact terminal members (36) which extend through the circuit board apertures (35) from the receptacle member (14) mounted to the first surface of said first circuit board extend through said defined space surrounded by said at least one wall (52);
• and
• at least one ground shield member (60) disposed along the outer periphery of said at least one wall (52);
• said at least one wall (52) being adapted to be received in the at least one elongated cavity (30) of a third receptacle member (14) mounted to a third of said plurality of circuit boards so that said at least one ground shield member (60) engages the terminal portions (44) of the second contact terminal members (42) of said third receptacle member (14) when said pin shroud member (16) and said third receptacle member (14) are mated to interconnect said first and third circuit boards.