Method for coating a substrate

A method for coating a substrate, comprising the steps of:

• forming a conductive coating layer on at least a part of a surface of the substrate so as to form a semi-product, the conductive coating layer being made of a conductive lacquer and having a surface resistance no greater than 500 Ω·m;
• submerging a conductive sheet and the semi-product into an electrophoresis medium that includes charged colloid particles, the conductive sheet and the semi-product functioning as electrodes;
• and
• applying a voltage ranging between 60V and 120V on one of the conductive sheet and the semi-product to form an electrical field among the conductive sheet, the semi-product and the electrophoresis medium, so that a part of the charged colloid particles move along a direction of the electric field toward the semi-product and an electrophoretic covering layer formed by the charged colloid particles is thus deposited on the conductive coating layer, the electrophoretic covering layer having a thickness no greater than 30 μm.