Spiral inductor having parallel-branch structure

• US 20030038697A1
• Filed: 12/28/2001
• Published: 02/27/2003
• Est. Priority Date: 08/22/2001
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Mheen, Bong-Ki, Suh, Dong-Woo, Kang, Jin-Yeong
• Granted Patent: US 6,661,325 B2
• 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
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 27/34 Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields

Abstract

A spiral inductor having a lower metal line and an upper metal line with an insulating layer interposed therebetween is provided. In the spiral inductor, the lower and upper metal lines are connected to each other through a via contact passing through the insulating layer. The upper metal line spirally turns inward from the periphery to the center, and the lower metal line includes a first lower metal line crossing the upper metal line and disposed to be parallel with another adjacent first lower metal line, and a second lower metal line disposed to be parallel with the upper metal line.

Claims

1. A spiral inductor having a lower metal line and an upper metal line with an insulating layer interposed therebetween, the lower and upper metal lines being connected to each other through a via contact passing through the insulating layer, wherein the upper metal line spirally turns inward from the periphery to the center, and the lower metal line includes a first lower metal line crossing the upper metal line and disposed to be parallel with another adjacent first lower metal line, and a second lower metal line disposed to be parallel with the upper metal line.

2. The spiral inductor according to claim 1, wherein the first lower metal line is relatively shorter than the second lower metal line.

3. The spiral inductor according to claim 1, wherein the upper and lower metal lines are electrically parallel connected to each other through the via contact.

4. The spiral inductor according to claim 1, wherein the area of the lower metal line is determined by a predetermined frequency at which the maximum Q-factor is exhibited.