Inductive device having electromagnetic radiation shielding mechanism and manufacturing method of the same

An inductive device manufacturing method, comprising:

• forming an inductive unit in an integrated circuit;
• performing an electromagnetic radiation test on the inductive unit;
• and
• when an amount of electromagnetic radiation related to the inductive unit exceeds a radiation threshold value, forming a shielding structure forming at least one closed shape that encloses the inductive unit,
• wherein the shielding structure has a width thereof and a distance separated from the inductive unit such that a decreasing amount of a quality factor of the inductive unit is not larger than a first predetermined value and a shielded amount of electromagnetic radiation is not lower than a second predetermined value;
• wherein the inductive unit has a symmetric shape and the inductive device further comprises a single asymmetric inductive portion electrically coupled to the inductive unit, and the closed shape of the shielding structure is formed to enclose the inductive unit and cover the single asymmetric inductive portion;
• wherein at least a part of the single asymmetric inductive portion extends along a peripheral direction of the shielding structure.