| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed circuit board including a circuit layer having durability against heat generated at the time of irradiation of laser light.SOLUTION: To eliminate a risk of a circuit layer 120 being penetrated at the time of irradiation of laser, a printed circuit board 100 includes: an insulating layer 110; a circuit layer 120 formed on one surface of the insulating layer 110; and a via electrode 130 penetrating through the insulating layer 110 and being connected with the circuit layer 120. The circuit layer 120 is formed in a structure where different kinds of metal layers 121, 122 with thermal conductivity different from each other are laminated. |
