Semiconductor device having conductive interconnections and porous and nonporous insulating portions
First Claim
1. A semiconductor device comprising:
- a substrate;
a first insulating film formed on the substrate, the first insulating film including a first porous insulating portion having a first groove, a second porous insulating portion having a second groove and a nonporous insulating portion located between the first and second porous insulating portions; and
a plurality of interconnections including a first conductive pattern disposed in the first groove and a second conductive pattern disposed in the second groove,wherein the interconnections comprise third, fourth, fifth, and sixth conductive patterns provided spaced away from each other, anda distance between the third conductive pattern and the fourth conductive pattern is shorter than a distance between the fifth conductive pattern and the sixth conductive pattern.
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Accused Products
Abstract
A semiconductor device and manufacturing method, wherein the semiconductor device has a semiconductor substrate on which a plurality of elements constituting a logic type device have been formed; a first interlayer insulating film on the semiconductor substrate; a plurality of groove patterns provided in the first interlayer insulating film; lower interconnections formed by embedding electroconductive films, which are composed of an electroconductive material such as copper, in the groove patterns; and first porous portions that are selectively provided in the portions of the first interlayer insulating film having the lower interconnections formed therein, the portions being in contact with the lower interconnections. A semiconductor device having an interlayer insulating film that exhibits satisfactory mechanical strengths, thermal conductivity and low dielectric constant is thus provided.
21 Citations
10 Claims
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1. A semiconductor device comprising:
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a substrate; a first insulating film formed on the substrate, the first insulating film including a first porous insulating portion having a first groove, a second porous insulating portion having a second groove and a nonporous insulating portion located between the first and second porous insulating portions; and a plurality of interconnections including a first conductive pattern disposed in the first groove and a second conductive pattern disposed in the second groove, wherein the interconnections comprise third, fourth, fifth, and sixth conductive patterns provided spaced away from each other, and a distance between the third conductive pattern and the fourth conductive pattern is shorter than a distance between the fifth conductive pattern and the sixth conductive pattern. - View Dependent Claims (2)
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3. A semiconductor device comprising:
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a substrate; a first insulating film formed on the substrate, the first insulating film including a first porous insulating portion having a first groove, a second porous insulating portion having a second groove and a nonporous insulating portion located between the first and second porous insulating portions; and a plurality of interconnections including a first conductive pattern disposed in the first groove and a second conductive pattern disposed in the second groove, wherein the porous insulating portions are composed of an insulating film that has been perforated at about 70% of an entire area thereof.
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4. A semiconductor device comprising:
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a substrate; a first insulating film formed on the substrate, the first insulating film including a first porous insulating portion having a first groove, a second porous insulating portion having a second groove and a nonporous insulating portion located between the first and second porous insulating portions; and a plurality of interconnections including a first conductive pattern disposed in the first groove and a second conductive pattern disposed in the second groove, wherein the insulating film includes an additive substance added thereto.
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5. A semiconductor device comprising:
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a substrate; a first insulating film formed on the substrate, the first insulating film including a first porous insulating portion having a first groove, a second porous insulating portion having a second groove and a first nonporous insulating portion located between the first and second porous insulating portions; a plurality of lower interconnections including a first conductive pattern disposed in the first groove and a second conductive pattern disposed in the second groove; a second insulating film formed on the first insulating film and the lower interconnections; a plurality of openings formed in the second insulating film on the lower interconnections; and a plurality of upper interconnections that are embedded in the openings and electrically connected with the lower interconnections, wherein the second insulating film in which the upper interconnections are formed comprises a plurality of third porous insulating portions provided in contact with the upper interconnections, and a plurality of second nonporous insulating portions provided in contact with the third porous insulating portions. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification