Printed circuit board

摘要

A printed circuit board includes: a substrate; a land that is disposed on a surface of the substrate, and includes a central portion and a plurality of extended portions, the central portion having the same shape and the same size as a land of a surface mount device, and the extended portions being up-and-down symmetry and right-and-left symmetry with respect to a straight line which passes through the center of the central portion; gaps that are disposed on the surface of the substrate, each of the gaps being disposed on a periphery of the central portion and between the extended portions; and a resist that is disposed on the surface of the substrate, and has an opening portion formed at a position corresponding to the central portion and the gaps.

主权项

1. A printed circuit board comprising:
a substrate; a first land disposed on the surface of the substrate and having at least one side; a second land disposed on an upper surface of the first land, the second land having a width smaller than a width of the first land, a same shape and a same size as a third land of a surface mount device, and at least one side surface; and a resist that is disposed on the surface of the substrate and has an opening portion formed at a position corresponding to the second land, the resist contacting the at least one side surface of the first land, a periphery of the upper surface of the first land, and a part of the at least one side surface of the second land; wherein a remaining part of the at least one side surface of the second land projects from an upper surface of the resist.