Patent ID: 8766450

Claim:
A lead pin for a package substrate, comprising: a connection pin adapted to be inserted into a hole formed in an external substrate; a head part formed on one end of the connection pin, the head part including a disc-type flange part formed on one end of the connection pin, and a semispherical round part formed on the bottom surface of the flange part and having a smaller area than the flange part; and a barrier part projecting from the flange part, and formed around a portion of the head part and on one surface of the head part in order to block the path of a solder paste so that the solder paste is prevented from flowing so as to cover the upper portion of the head part when the head part is mounted on the package substrate, the barrier part having an inner diameter equal to or larger than a diameter of the semispherical round part and being projected, in a tapered shape, from a side or bottom surface of the flange part.