Fin field effect transistor (FinFET) device structure and method for forming the same
First Claim
1. A method for forming a fin field effect transistor (FinFET) device structure, comprising:
- forming first plurality of fin structures and second plurality of fin structures in a first region and a second region of a substrate, respectively, wherein forming the first plurality of fin structures and the second plurality of fin structures comprises;
forming a third plurality of fin structures in the second region, wherein a density of the first plurality of fin structures in the first region is substantially equal to a density of a combination of the third plurality of fin structures and the second plurality of fin structure in the second region; and
removing the third plurality of fin structures to increase a spacing between the first plurality of fin structures and the second plurality of fin structures; and
forming an isolation structure on the substrate, wherein the isolation structure has a height difference between the first plurality of fin structures and the second plurality of fin structures.
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Abstract
A fin field effect transistor (FinFET) device structure is provided. The FinFET structure includes a substrate, and the substrate includes a first region and a second region. The FinFET structure includes a first plurality of fin structures formed on the first region and a second plurality of fin structures formed on the second region. A density of the first plurality of fin structures is greater than a density of the second plurality of fin structures. The FinFET structure also includes a plurality of protruding structures between two adjacent second plurality of fin structures in the second region and an isolation structure formed on the substrate. The isolation structure has a gap height between the first plurality of fin structures and the second plurality of fin structures.
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Citations
20 Claims
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1. A method for forming a fin field effect transistor (FinFET) device structure, comprising:
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forming first plurality of fin structures and second plurality of fin structures in a first region and a second region of a substrate, respectively, wherein forming the first plurality of fin structures and the second plurality of fin structures comprises; forming a third plurality of fin structures in the second region, wherein a density of the first plurality of fin structures in the first region is substantially equal to a density of a combination of the third plurality of fin structures and the second plurality of fin structure in the second region; and removing the third plurality of fin structures to increase a spacing between the first plurality of fin structures and the second plurality of fin structures; and forming an isolation structure on the substrate, wherein the isolation structure has a height difference between the first plurality of fin structures and the second plurality of fin structures. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for forming a fin field effect transistor (FinFET) device structure, comprising:
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forming a first plurality of fin structures and a second plurality of fin structures in a first region and a second region of a substrate, respectively, wherein a first pitch between two adjacent fin structures of the first plurality of fin structures is different from a second pitch between two adjacent fin structures of the second plurality of fin structures; depositing a hard mask layer is over the first plurality of fin structures and the second plurality of fin structures; depositing a dielectric layer adjacent to the hard mask layer, wherein a top surface of the dielectric layer is substantially level with a top surface of the hard mask layer; removing the hard mask layer to expose top surfaces of the first plurality of fin structures and top surfaces of the second plurality of fin structures; and removing a portion of the dielectric layer to form an isolation structure on the substrate. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for forming a multiple fin structures, comprising:
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forming first plurality of fin structures in a first region and second plurality of fin structures in a second region of a substrate, wherein a density of the first plurality of fin structures is greater than a density of the second plurality of fin structures; forming a plurality of protruding structures between two adjacent second plurality of fin structures in the second region; forming a sacrificial layer on the first plurality of fin structures, the second plurality of fin structures and the plurality of protruding structures; and removing an upper portion of the sacrificial layer to form an isolation structure on the substrate, wherein the plurality of protruding structures are covered by the isolation structure, and the first plurality of fin structures and the second plurality of fin structures extend above the isolation structure. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification