Wiring structure

• US 20030226685A1
• Filed: 05/27/2003
• Published: 12/11/2003
• Est. Priority Date: 06/07/2002
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Murakami, Yoshinori
• Granted Patent: US 6,828,506 B2
• Time in Patent Office: Days
• US Class Current: 174/117F
• CPC Class Codes: H01L 23/5383 Multilayer substrates H01L23/5385 takes precedence; multilayer metallisation on monolayer substrates H01L23/538
• CPC Class Codes: H01L 25/072 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H05K 1/0216 Reduction of cross-talk, noise or electromagnetic interference grounding H05K1/0215
• CPC Class Codes: H05K 2201/09672 Superposed layout, i.e. in different planes parallel traces in one plane H05K2201/09236
• CPC Class Codes: H05K 2201/09727 Varying width along a single conductor; Conductors or pads having different widths

Abstract

A wiring or electrode structure is configured to reduce the wiring inductance of the power conductors in a semiconductor power module and prevent as much as possible the emission of interference electromagnetic waves. The wiring or electrode structure has an insulation layer that faces a main surface of a conductive base layer, a first conductor that faces the surface of the insulation layer, and a second conductor through which current flows in the opposite direction as the current that flows in the first conductor. The second electrical conductor overlying the first electrical conductor such opposite longitudinal edges of the second electrical conductor extend beyond corresponding longitudinal edges of the first electrical conductor at all locations by predetermined distances.

Claims

1. A wiring structure comprising:

a conductive base layer having a first base surface;

an insulation layer having first and second main surfaces with the first main surface facing the first base surface of the conductive base layer;

a first electrical conductor being arranged to face the second main surface of the insulation layer; and

a second electrical conductor arranged relative to the first electrical conductor such that a current direction in the second electrical conductor is opposite to a current direction of the first electrical conductor,

the second electrical conductor overlying the first electrical conductor such that edges of the second electrical conductor extend beyond corresponding edges of the first electrical conductor at all locations by predetermined distances.

2. The wiring structure as recited in claim 1, wherein

the predetermined distances by which the edges of the second electrical conductor extend beyond the edges of the first electrical conductor is at least one-half of a distance from the edges of the second electrical conductor to the first base surface of the conductive base layer.

3. The wiring structure as recited in claim 1, wherein

each of the first and second electrical conductors has a main conductor portion extending substantially parallel to the first base surface of the conductive base layer and a standing portion extending from the main conductor portion in a direction away from the conductive base layer, and

the standing portion of the second electrical conductor has a U-shaped cross section defined by a pair of leg sections and a center section extending between the leg sections that are arranged to partially enclose the standing portion of the first electrical conductor.

4. The wiring structure as recited in claim 3, wherein

the standing portion of the first electrical conductor extends between the leg sections of the standing portion of the second electrical conductor such that the standing portion of the first electrical conductor does not extend laterally out of the U-shaped cross section of the standing portion of the second electrical conductor.

5. The wiring structure as recited in claim 4, wherein

the leg sections of the standing portion of the second electrical conductor have free end edges defining a longitudinal opening of the U-shaped cross section that are spaced apart by a first distance, and the standing portion of the first electrical conductor is spaced from the free end edges of the leg sections of the standing portion of the second electrical conductor by a second distance that is at least one-fourth of the first distance.

6. The wiring structure as recited in claim 3, wherein

a first of the leg sections of the standing portion of the second electrical conductor has a collar portion extending above the insulation layer and substantially parallel to the first base surface of the conductive base layer in an area such that the first electrical conductor is not disposed between the collar portion and the insulation layer.

7. The wiring structure as recited in claim 6, wherein

the collar portion extends outwardly from the first of the leg sections of the standing portion of the second electrical conductor by a distance that is at least one-half of a distance formed between the collar portion and the first base surface of the conductive base layer.

8. The wiring structure as recited in claim 3, wherein

the second electrical conductor further includes an end section extending outwardly from the standing portion of the second electrical conductor that is coupled to the main conductor portion of the second electrical conductor, and a slit being located adjacent an area where the end section extends from the standing portion of the second electrical conductor, the slit extending substantially parallel to a ridge line formed between the end section and one of the leg sections, and the slit has a transverse width that is less than or equal to twice a distance between the standing portion and the first electrical conductor.

9. The wiring structure as recited in claim 3, wherein

the standing portion of the second electrical conductor further includes an end section extending outwardly from the standing portion of the second electrical conductor in a direction substantially parallel to the first base surface of the conductive base layer, the end section being coupled to the main conductor portion of the second electrical conductor, the end section having a slit arranged to extend perpendicularly to a ridge line formed between the end section and one of the leg sections, and the slit having a transverse width is less than or equal to twice a spacing formed between the end section and the first electrical conductor.

10. A wiring structure comprising:

base means for forming a conductive layer having a first base surface;

insulation means for overlying and insulating the first base surface of the base means;

first electrical conductive means for conducting electrical current and being disposed over the insulation means; and

second electrical conductive means for conducting electrical current and being arranged relative to the first electrical conductive means such that a current direction in the second electrical conductive means that is opposite to a current flowing direction of the first electrical conductive means,

the second electrical conductive means overlying the first electrical conductive means such that edges of the second electrical conductive means extend beyond corresponding edges of the first electrical conductive means at all locations by predetermined distances.