Printed circuit board having arrays of lands arranged inside and outside of each other having a reduced terminal-pitch

A printed circuit board, for mounting parts with at least one array of at least one ball-type terminal for electric connection arranged relatively inside and outside of one another, comprising:

• at least one array of lands for electric connection with said at least one array of ball-type terminal, arranged relatively inside and outside of one another, formed corresponding to said at least one array of ball-type terminal;
• and
• a pattern, originating from an inner land and continuing between two outer lands,
• wherein a size of an outer land, in a direction along an outside array is relatively less than a size of said inner land in a direction along an inside array, and
• a size of said outer land in a direction perpendicular to said direction along said outside array is relatively greater than the size of said outer land in the direction along the outside array.

A printed circuit board, for mounting parts with at least one array of at least one ball-type terminal for electric connection arranged relatively inside and outside of one another, comprising:

• at least one array of lands for electric connection with said at least one array of ball-type terminal, arranged relatively inside and outside of one another, formed corresponding to said at least one array of at least one ball-type terminal;
• and
• a pattern, originating from an inner land and continuing between two outer lands,
• wherein a size of an outer land, in a direction along an outside array is relatively less than a size of said inner land in a direction along an inside array,
• a size of said outer land, in a direction perpendicular to said direction along said outside array being greater than the size of said outer land in the direction along the outside array,
• said size of said outer land in the direction along the outside array being equal to or less than 0.15 mm,
• a pitch between inner lands being equal to or less than 0.5 mm, and
• a pitch between outer lands being equal to or less than 0.5 mm.