Patent ID: 7888791

Claim:
An information processing system including at least one integrated circuit chip and at least one electrical connection device, the electrical connection device comprising: a main board including electrical connection pads and electrical connection tracks on a first face, the main board also including electrical connection vias; an intermediate board including first electrical connection pads on a first face for connection of the chip, second electrical connection pads on a second face, and electrical connections between the first and second pads; and electrical connection balls located in a space separating the main board and the intermediate board, the electrical connection balls being interposed between the pads of the main board and the second pads of the intermediate board, wherein a peripheral zone of the space comprises a peripheral matrix of four rows of balls on a peripheral side of the space, the rows of the matrix being defined in a longitudinal direction, a central zone of the space comprises a central matrix of balls, a first secondary zone of the space is adjacent to the peripheral zone of the space, the first secondary zone comprising a matrix of two rows of electrical connection vias made in the main board and linked by the electrical connection tracks to respective balls of the two adjacent rows of balls of the peripheral matrix, a second secondary zone of the space comprises a matrix of at least two rows of electrical connection vias made in the main board and linked by the electrical connection tracks to respective balls of the central matrix, the first secondary zone and the second secondary zone are separated by an intermediate zone of the space, and the intermediate zone is divided into at least two parts, one part of the intermediate zone comprising at least one row of electrical connection balls, and another part of the intermediate zone comprising electrical connection vias made in the main board and linked by the electrical connection tracks to respective balls of the one part of the intermediate zone.