| 摘要 |
[PROBLEMS] To provide a method of manufacturing a printed wiring board capable of surely forming a high solder bump on a small diameter connection pad provided in the opening of a solder resist. [MEANS FOR SOLVING THE PROBLEMS] A solder ball (77) is molten by reflowing to form a high solder bump (78U) from the solder ball (77) installed in the upper surface opening (71). Since a distance between the solder ball (77) installed in the opening (71) and the connection pad (158P) is reduced by adjusting the thickness of a solder resist layer (70), the solder bump (78U) can be surely connected to the connection pad (158P) when the solder ball (77) is molten by reflowing. ® KIPO & WIPO 2008 |
