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The present invention enables easy designing for arranging conductive particles for a conductive film that is easily adaptable to connection to a mini LED or to a micro LED. This designing method is for arranging conductive particles P in a conductive film having the conductive particles P held in a

The present invention enables easy designing for arranging conductive particles for a conductive film that is easily adaptable to connection to a mini LED or to a micro LED. This designing method is for arranging conductive particles P in a conductive film having the conductive particles P held in an insulating resin layer when the conductive film is used to connect terminals having a terminal length L1 and a terminal width L2, the method involving: setting arrangement such that the conductive particles P are at lattice points of a rectangular lattice or a rhombic lattice and have a lattice axis orthogonal to the long direction or short direction of the conductive film; then setting the number density or the like of the conductive particles P in the conductive film; then selecting, from among lattice points which are distanced by a terminal length L1 or less from a lattice point A, a lattice point B which has the smallest angle formed between a straight line connecting said lattice point to the lattice point A and the film short direction; rotating the lattice about the lattice point A to obtain a rotation angle α of the lattice where the lattice point A and the lattice point B overlap in the film short direction; and determining the inclination angle of the lattice axis of the conductive film on the basis of the angle α.

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