Patent ID: 7621759

Claim:
An electronic apparatus comprising: a board having a front surface and a back surface opposite to each other; and an electronic component including a body made of an insulating material, wherein: the electronic component further includes a plurality of terminals; the plurality of terminals is aligned on the body along a first direction, the first direction being substantially parallel to the front surface of the board; each terminal is partially held in the body; the board includes a plurality of lands; the electronic component is mounted to the board with the body being located on the front surface of the board in such a manner that each terminal is coupled with a corresponding land through a solder; the board further has a plurality of through-holes; each through-hole has a front open-end on the front surface of the board and a back open-end on the back surface of the board; the back open-end of the each through-hole has generally a circular shape; each land includes a front land part, a back land part and a side-wall land part integrated together; the front land part of the each land surrounds the front open-end of a corresponding through-hole; the back land part of the each land surrounds the back open-end of the corresponding through-hole; the side-wall land part of the each land is located on a side-wall of the corresponding through-hole; the each terminal has an insertion-mounting part that is soldered to the corresponding land while being inserted into the corresponding through-hole; a shape of a perimeter of the back land part of the each land is different from the circular shape of the back open-end of the corresponding through-hole; the back land part of the each land has: a first length defined as a length of a first reference segment, wherein the first reference segment (i) interconnects two points on the perimeter of the back land part, (ii) passes through a center of the corresponding through-hole, and (iii) is substantially parallel to the first direction; and a second length defined as a length of a second reference segment, wherein the second reference segment (i) interconnects other two points on the perimeter of the back land part, (ii) passes through a center of the corresponding through-hole and (iii) is substantially parallel to a second direction, the second direction being substantially perpendicular to the first direction and substantially parallel to the front surface of the board; and the first length is different from the second length.