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

• US 20080094165A1
• Filed: 10/10/2007
• Published: 04/24/2008
• Est. Priority Date: 10/23/2006
• Status: Active Grant

• Current Assignee: Commissariat a L'Energie Atomique (AES Corporation), Stmicroelectronics France (STMicroelectronics NV)
• Original Assignee: Commissariat a L'Energie Atomique (AES Corporation), Centre National De La Recherche Scientifique, STMicroelectronics SA (STMicroelectronics NV)
• Inventors: Viala, Bernard, Orlando, Bastien
• Granted Patent: US 7,423,509 B2
• Time in Patent Office: Days
• US Class Current: 336/221
• CPC Class Codes: H01F 17/0033 with the coil helically wound around a magnetic core
• CPC Class Codes: H01F 17/04 with magnetic core

Abstract

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

Claims

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.