Printed circuit board and method of manufacturing the same

A printed circuit board, comprising:

• an insulating plate divided into an active region, a dummy region surrounding the active region, and an insulating region between the active region and the dummy region;
• first circuit patterns patterned on the active region of the insulating plate;
• an insulating layer on the active region, the dummy region, and the insulating region of the insulating plate;
• vias formed within the insulating layer corresponding to the active region of the insulating plate and connected to the first circuit patterns, respectively;
• second circuit patterns formed in circuit pattern grooves formed on a surface of the insulating layer corresponding to the active region of the insulating plate;
• and
• dummy patterns formed in dummy pattern grooves formed on a surface of the insulating layer corresponding to the dummy region of the insulating plate,
• wherein a shape of the dummy patterns is the same as that of the second circuit patterns, and
• wherein a printed circuit board unit includes only the active region and is formed by separating the active region from the dummy region by cutting.