Method for fabricating semiconductor device and semiconductor device
First Claim
1. A method for fabricating a semiconductor device comprising:
- forming a first thin film above a substrate;
defining a first opening in said first thin film;
depositing a conductive material in the first opening;
forming a second thin film made of a porous material above said first thin film with said conductive material being deposited in the first opening;
defining in said second thin film a second opening extending therethrough;
depositing a conductive material in the second opening; and
removing said first thin film through voids in said second thin film after deposition of said conductive material in the second opening.
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Accused Products
Abstract
A method of fabricating a semiconductor device having an air-gapped multilayer interconnect wiring structure is disclosed. After having formed a first thin film on or above a substrate, define a first opening in the first thin film. Then, deposit a conductive material in the first opening. Then form a second thin film made of a porous material above the first thin film with the conductive material being deposited in the first opening. Next, define in the second thin film a second opening extending therethrough, followed by deposition of a conductive material in the second opening. The first thin film is removed through voids in the second thin film after having deposited the conductive material in the second opening. An integrated semiconductor device as manufactured thereby is also disclosed.
42 Citations
20 Claims
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1. A method for fabricating a semiconductor device comprising:
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forming a first thin film above a substrate;
defining a first opening in said first thin film;
depositing a conductive material in the first opening;
forming a second thin film made of a porous material above said first thin film with said conductive material being deposited in the first opening;
defining in said second thin film a second opening extending therethrough;
depositing a conductive material in the second opening; and
removing said first thin film through voids in said second thin film after deposition of said conductive material in the second opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of fabricating a semiconductor device comprising:
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forming above a substrate a first wiring layer with a plurality of electrical wires being buried in a sacrifice film;
forming above said first wiring layer a second wiring layer having via plugs for connection to said wires; and
removing of said sacrifice film between adjacent wires of said first wiring layer to thereby form a cavity after having formed said second wiring layer. - View Dependent Claims (13, 14, 15)
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16. A semiconductor device comprising:
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a plurality of wires having a cavity defined between neighboring ones of said wires; and
a reinforcing film being disposed on a sidewall of each said wire and having a flange projecting toward said cavity at least one portion thereof. - View Dependent Claims (17, 18, 19, 20)
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Specification