Electrical connection board and assembly of such a board and a semiconductor component comprising an integrated circuit chip

An assembly comprising:

• a semiconductor component having electrical connection terminals on one face;
• and
• a board, comprising:
• a plurality of electrical connection terminals on one face of the board for connection to the semiconductor component, wherein the terminals are generally arranged in a matrix having two orthogonal directions;
• a plurality of electrical connection tracks connected respectively to these terminals;
• wherein the electrical connection terminals are divided into a multiplicity of identical adjacent connection groups possessing the following characteristics:
• each group comprises N adjacent terminals placed along a first direction of the matrix and N tracks extending along said first direction towards an edge of the matrix;
• the N tracks comprise a central track connected to an end terminal on a side towards the edge of the matrix and plural lateral tracks arranged so that, when the number of terminals N is equal to an odd number, the number of lateral tracks passing on each side of the end terminal is equal to one-half of the number of terminals N minus one ((N−1)/2), and, when the number of terminals N is equal to an even number, the number of lateral tracks passing on one side of the end terminal is equal to one-half the number of tracks N (N/2) and the number of lateral tracks passing on the other side of this said end terminal is equal to one-half of the number of terminals N minus one ((N−1)/2);
• the terminals of a first group are offset by one pitch relative to the terminals of an adjacent second group along each direction of the matrix;
• and
• an offset along said first direction is such that a number of lateral tracks equal to the number of terminals N minus one (N−1) pass between the end terminals located on the side of the edge of the matrix and a number of lateral tracks equal to the number of terminals N minus two (N−2) pass between the end terminal of one group and the second terminal of the other group, which are adjacent along a second direction of the matrix;
• wherein the electrical connection terminals of the semiconductor component are connected to the electrical connection terminals of the board by use of electrical connection balls.

An electrical connection board comprising:

• a plurality of electrical connection terminals on one face of the board for connection to a semiconductor component, wherein the terminals are generally arranged in a matrix having two orthogonal directions;
• a plurality of electrical connection tracks connected respectively to these terminals;
• wherein the electrical connection terminals are divided into a multiplicity of connection groups possessing the following characteristics:
• each group comprises N adjacent terminals placed along a first direction of the matrix and N tracks extending along said first direction towards an edge of the matrix;
• the N tracks comprise a central track connected to an end terminal on a side towards the edge of the matrix and plural lateral tracks arranged so that, when the number of terminals N is equal to an odd number, the number of lateral tracks passing on each side of the end terminal is equal to one-half of the number of terminals N minus one ((N−1)/2);
• the terminals of a first group are offset by one pitch relative to the terminals of an adjacent second group along each direction of the matrix;
• and
• an offset along said first direction is such that a number of lateral tracks equal to the number of terminals N minus one (N−1) pass between the end terminals located on the side of the edge of the matrix and a number of lateral tracks equal to the number of terminals N minus two (N−2) pass between the end terminal of one group and the second terminal of the other group, which are adjacent along a second direction of the matrix.

An electrical connection board comprising:

• a plurality of electrical connection terminals on one face of the board for connection to a semiconductor component, wherein the terminals are generally arranged in a matrix having two orthogonal directions;
• a plurality of electrical connection tracks connected respectively to these terminals;
• wherein the electrical connection terminals are divided into a multiplicity of connection groups possessing the following characteristics:
• each group comprises N adjacent terminals placed along a first direction of the matrix and N tracks extending along said first direction towards an edge of the matrix;
• the N tracks comprise a central track connected to an end terminal on a side towards the edge of the matrix and plural lateral tracks arranged so that, when the number of terminals N is equal to an even number, the number of lateral tracks passing on one side of the end terminal is equal to one-half the number of tracks N (N/2) and the number of lateral tracks passing on the other side of this said end terminal is equal to one-half of the number of terminals N minus one ((N−1)/2);
• the terminals of a first group are offset by one pitch relative to the terminals of an adjacent second group along each direction of the matrix;
• and
• an offset along said first direction is such that a number of lateral tracks equal to the number of terminals N minus one (N−1) pass between the end terminals located on the side of the edge of the matrix and a number of lateral tracks equal to the number of terminals N minus two (N−2) pass between the end terminal of one group and the second terminal of the other group, which are adjacent along a second direction of the matrix.

An electrical connection board comprising:

• a plurality of electrical connection terminals on one face of the board for connection to a semiconductor component, wherein the terminals are positioned at selected intersection points in a matrix having two orthogonal directions;
• a plurality of electrical connection tracks connected respectively to these terminals;
• wherein the electrical connection terminals are divided into a plurality of connection groups, each connection group including N adjacent terminals aligned along a first one of the orthogonal directions which is perpendicular to an edge of the board;
• wherein N electrical connection tracks connect to the N adjacent terminals and extend parallel to the first orthogonal direction towards the edge of the board;
• and
• wherein a first of the connection groups is diagonally offset from a second of the connection groups by one intersection point in both of the two orthogonal directions.