Thin film device

• US 20060220776A1
• Filed: 03/27/2006
• Published: 10/05/2006
• Est. Priority Date: 03/31/2005
• Status: Abandoned Application

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: Fujiwara, Toshiyasu
• Application Number:
  US11/389,237
• Publication Number:
  US 20060220776A1
• Time in Patent Office: Days
• US Class Current: 336/200
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K

Abstract

The present invention provides a thin film device in which parasitic capacitance can be reduced as much as possible. In the case where a coil is provided so as to be insulated between an upper magnetic film and a lower magnetic film, the coil is constructed so that the cross section of the coil has the minimum width at its edges closest to the upper and lower magnetic films. Parasitic capacitance generated between the coil and the lower magnetic film and parasitic capacitance generated between the coil and the upper magnetic film are reduced and, in addition, parasitic capacitance generated between turns of the coil is also reduced.

Claims

1. A thin film device comprising a coil provided for a base body having conducting properties so as to be insulated from the base body,

wherein cross section of the coil has the minimum width at its edge closest to the base body.

2. The thin film device according to claim 1, wherein one base body is disposed on one side of the coil.

3. The thin film device according to claim 2, wherein the cross section of the coil has a shape selected from a group of shapes including a trapezoidal shape and a hexagon shape obtained by combining a trapezoid and a rectangle.

4. The thin film device according to claim 1, wherein two base bodies are disposed on one side and the other side of the coil.

5. The thin film device according to claim 4, wherein the cross section of the coil has a shape selected from a group of shapes including a hexagon shape and a cross shape.

6. The thin film device according to claim 1, wherein the base body is a magnetic body.

7. The thin film device according to claim 2, wherein the base body is a magnetic body.

8. The thin film device according to claim 3, wherein the base body is a magnetic body.

9. The thin film device according to claim 4, wherein the base body is a magnetic body.

10. The thin film device according to claim 5, wherein the base body is a magnetic body.