Semiconductor device and manufacturing method thereof
First Claim
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1. A semiconductor device comprising:
- an element isolation structure in which trenches formed in an element isolation region on a semiconductor substrate are filled up with insulating materials;
a first conductivity type element formed in a first active region divided by said element isolation structure; and
a second conductivity type element formed in a second active region divided by said element isolation structure, said element isolation structure comprising;
a first element isolation region of said element isolation region including regions adjacent to a pair of opposed ends of said second active region, said first element isolation region being filled with an insulating material that gives a compressive stress to said second active region; and
a second element isolation region of said element isolation region other than said first element isolation region, said second element isolation region being filled with an insulating material that gives a tensile stress to each of said first and second active regions.
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Abstract
The active region of an NMOS transistor and the active region of a PMOS transistor are divided by an STI element isolation structure. The STI element isolation structure is made up of a first element isolation structure formed so as to include the interval between both active regions, and a second element isolation structure formed in the region other than the first element isolation structure.
70 Citations
19 Claims
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1. A semiconductor device comprising:
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an element isolation structure in which trenches formed in an element isolation region on a semiconductor substrate are filled up with insulating materials;
a first conductivity type element formed in a first active region divided by said element isolation structure; and
a second conductivity type element formed in a second active region divided by said element isolation structure, said element isolation structure comprising;
a first element isolation region of said element isolation region including regions adjacent to a pair of opposed ends of said second active region, said first element isolation region being filled with an insulating material that gives a compressive stress to said second active region; and
a second element isolation region of said element isolation region other than said first element isolation region, said second element isolation region being filled with an insulating material that gives a tensile stress to each of said first and second active regions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A manufacturing method of a semiconductor device in which first and second active regions are divided by an element isolation structure formed in an element isolation region on a semiconductor substrate, and first and second conductivity type elements are formed in said first and second active regions, respectively,
said element isolation region comprising a first element isolation region including regions adjacent to a pair of opposed ends of said second active region, and a second element isolation region other than said first element isolation region, said method comprising the steps of: -
forming a first trench in said second element isolation region on said semiconductor substrate, and filling up said first trench with an insulating material that gives a tensile stress to each of said first and second active regions; and
forming a second trench in said first element isolation region on said semiconductor substrate, and filling up said second trench with an insulating material that gives a compressive stress to said second active region. - View Dependent Claims (14, 15, 16)
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17. A manufacturing method of a semiconductor device in which first and second active regions are divided by an element isolation structure formed in an element isolation region on a semiconductor substrate, and first and second conductivity type elements are formed in said first and second active regions, respectively,
said element isolation region comprising a first element isolation region including regions adjacent to a pair of opposed ends of said second active region, and a second element isolation region other than said first element isolation region, said method comprising the steps of: -
forming a first trench in said element isolation region on said semiconductor substrate, and filling up said first trench with an insulating material that gives a tensile stress to each of said first and second active regions; and
forming a second trench in a portion of said insulating material having filled up said first trench to give a tensile stress, corresponding to said first element isolation region, and filling up said second trench with an insulating material that gives a compressive stress to said second active region. - View Dependent Claims (18, 19)
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Specification