Scarf patch repair method for stealth composite structure

A method of repairing a stealth composite structure by using a scarf patch, wherein a damaged portion of the stealth composite structure having a stealth function is repaired through the scarf patch, the method comprising steps of:

• diagnosing the damaged portion;
• deriving a repair area comprising the diagnosed damaged portion;
• processing the scarf patch based on the derived repair area that includes a first surface, a second surface toward a direction opposite to a direction that the first surface faces, and a body having a same stack structure as a stack structure of the stealth composite structure between the first surface and the second surface, and the first surface corresponds to the derived repair area and the second surface is processed to have a structure having a length that has been extended 20 times a depth of the derived repair area from an edge of the first surface;
• processing a patch hole based on the derived repair area so that the damaged portion is removed;
• and
• combining the scarf patch with the patch hole so that an inner wall of the patch hole and a side of the scarf patch face each other,
• wherein the stealth composite structure includes an electromagnetic wave absorption layer on which a first sheet that is formed as glass fiber coated with nickel impregnated into epoxy resin has been stacked, and a dielectric layer on which a second sheet that is formed as glass fiber impregnated into epoxy resin has been stacked.