Printed-circuit board, printed-wiring board, and electronic apparatus

A printed-wiring board on which an electronic component having a heat radiation part can be mounted, comprising:

• a land group with which a terminal group of the electronic component is joined;
• a first conductor pattern which is arranged in a mounting area where the electronic component is mounted and which is joined with the heat radiation part of the electronic component;
• a second conductor pattern, at least a part of which is arranged on an outside of the mounting area;
• and
• a third conductor pattern which connects the first conductor pattern and the second conductor pattern,
• wherein the land group includes a first land adjacent to the third conductor pattern and a second land which is not adjacent to the third conductor pattern, and
• the first land is formed in a shape different from that of the second land so as to be spaced from the third conductor pattern.

An electronic device comprising:

• a printed-circuit board;
• and
• an operating unit connected to the printed-circuit board,
• wherein the printed-circuit board comprises:
• an electronic component having a heat radiation part;
• and
• a printed-wiring board on which the electronic component is mounted,
• wherein the printed-wiring board comprises:
• a land group with which a terminal group of the electronic component is joined;
• a first conductor pattern arranged in a mounting area where the electronic component is mounted and joined with the heat radiation part of the electronic component;
• a second conductor pattern, at least a part of which is arranged on an outside of the mounting area;
• and
• a third conductor pattern which connects the first conductor pattern to the second conductor pattern,
• wherein the land group includes a first land adjacent to the third conductor pattern and a second land which is not adjacent to the third conductor pattern, and
• the first land is formed in a shape different from that of the second land so as to be spaced from the third conductor pattern.