A base of LED includes a negative pole seat and a positive pole seat. The
negative pole seat is made of conductive material with a flat negative
pole plate at a lower outer side thereof, an integral negative pole body
at an inner side thereof, multiple upright negative pole seat grooves at
two lateral sides thereof and a negative pole recess at the top thereof
respectively. The positive pole seat also is made of conductive material
with a flat positive pole plate at the lower outer side thereof, an
integral positive pole body at the inner side thereof, multiple seat
grooves extending upright from the bottom at two lateral sides thereof. A
crystal grain is located at the negative pole recess and a connecting wire
at both ends thereof joined to the positive pole seat and the crystal
grain and the negative pole plate and the positive pole plate are adhered
to circuit of a circuit board to form a close circuit.
