Coil comprising several coil branches and micro-inductor comprising one of the coils

1. A coil comprising a plurality of non-joined turns forming a plurality of substantially parallel coil branches, each turn comprising a rectangular bottom flat section in a bottom plane, a rectangular top flat section in a top plane and two rising sections, the rising sections of two adjacent branches arranged between the two adjacent branches being arranged alternately in a single plane, wherein the top and bottom sections corresponding to one and the same turn being aligned with respect to one another and having a larger width than the width of the corresponding rising sections arranged between two adjacent coil branches, the turns fill almost all of the enveloping surface of the coil, a minimum isolating gap separating the adjacent turns.

2. The coil according to claim 1 , wherein the top and bottom sections corresponding to one and the same turn have the same shape.

3. The coil according to claim 1 , wherein the top and bottom sections have a larger width than the sum of the widths of the corresponding rising sections arranged between two adjacent coil branches.

4. The coil according to claim 1 , wherein the rising sections arranged outside an external branch of the coil present the same width as the top and bottom sections of the corresponding turns.

5. A micro-inductor, comprising a coil according to claim 1 .

6. The micro-inductor according to claim 5 , comprising a magnetic core enveloped by the coil.