Detection apparatus and target detection and repair system

A detection apparatus, comprising:

• a conductive film having N film regions, wherein any two of the film regions are insulated from each other, the conductive film is used to fit with an insulating layer of a target, and the target comprises a metal layer, the insulating layer covering the metal layer;
• a signal generator configured to transmit a first electromagnetic signal to the conductive film;
• and
• a signal receiver comprising N collecting units, wherein a n-th film region corresponds to a n-th collecting unit, and the signal receiver is configured to obtain a n-th collecting signal from a second electromagnetic signal generated after the first electromagnetic signal undergoes actions of the conductive film, the insulating layer, and the metal layer;
• wherein n is a positive integer less than or equal to N;
• wherein the signal receiver is configured to use the n-th collecting signal to determine whether there is a predetermined defect in a region of the insulating layer covered by the n-th film region;
• and to use position information of the n-th film region to determine position information of the predetermined defect on the insulating layer.