Method for Forming Self-Aligned Trench Contacts of Semiconductor Components and A Semiconductor Component
First Claim
1. A method for producing a semiconductor component, comprising:
- providing a semiconductor arrangement comprising;
a semiconductor body comprising a first semiconductor material extending to a first surface and at least one trench extending from the first surface, the at least one trench comprising a conductive region insulated from the semiconductor body and arranged below the first surface;
forming a second insulation layer on the first surface comprising a recess that overlaps in a projection onto the first surface with the conductive region;
forming a mask region in the recess; and
etching the second insulation layer selectively to the mask region and the semiconductor body to expose the semiconductor body at the first surface;
depositing a third insulation layer on the first surface; and
etching the third insulation layer so that a semiconductor mesa of the semiconductor body arranged next to the at least one trench is exposed at the first surface.
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Accused Products
Abstract
A method for producing a semiconductor component is described. The method includes providing a semiconductor body having a first surface and being comprised of a first semiconductor material extending to the first surface. At least one trench extends from the first surface into the semiconductor body and includes a gate electrode insulated from the semiconductor body and arranged below the first surface. The method further includes: forming a second insulation layer on the first surface with a recess that overlaps in projection onto the first surface with the conductive region; forming a mask region in the recess; etching the second insulation layer selectively to the mask region and the semiconductor body to expose the semiconductor body at the first surface; depositing a third insulation layer on the first surface; and etching the third insulation layer so that a semiconductor mesa of the semiconductor body arranged next to the a least one trench is exposed at the first surface.
14 Citations
25 Claims
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1. A method for producing a semiconductor component, comprising:
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providing a semiconductor arrangement comprising;
a semiconductor body comprising a first semiconductor material extending to a first surface and at least one trench extending from the first surface, the at least one trench comprising a conductive region insulated from the semiconductor body and arranged below the first surface;forming a second insulation layer on the first surface comprising a recess that overlaps in a projection onto the first surface with the conductive region; forming a mask region in the recess; and etching the second insulation layer selectively to the mask region and the semiconductor body to expose the semiconductor body at the first surface; depositing a third insulation layer on the first surface; and etching the third insulation layer so that a semiconductor mesa of the semiconductor body arranged next to the at least one trench is exposed at the first surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for producing a semiconductor component, comprising:
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providing a semiconductor arrangement comprising;
a semiconductor body comprising a first semiconductor material extending to a first surface and at least one trench extending from the first surface, the at least one trench comprising a gate electrode insulated from the semiconductor body and arranged below the first surface;depositing an insulation layer on the first surface and the gate electrode so that the insulation layer comprises a recess that is, in a projection onto the first surface, completely arranged within the at least one trench; and filling the recess with a non-crystalline form of the first semiconductor material to form a mask region. - View Dependent Claims (17, 18)
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19. A method for producing a semiconductor component, comprising:
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providing a semiconductor arrangement comprising;
a semiconductor body comprising a first semiconductor material extending to a first surface and at least one trench extending from the first surface, the at least one trench comprising a gate electrode insulated from the semiconductor body and arranged below the first surface;depositing an insulation layer on the first surface and the gate electrode so that the insulation layer comprises a recess which is, in a projection onto the first surface, completely arranged within the at least one trench; and forming a mask region comprising depositing a dielectric material on the insulation layer and plasma etching the dielectric material using the insulation layer as an etch-stop. - View Dependent Claims (20, 21)
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22. A field effect semiconductor component, comprising:
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a semiconductor body having a first surface defining a vertical direction; at least one trench extending from the first surface into the semiconductor body and comprising a gate electrode arranged below the first surface and being insulated from the semiconductor body; a first metallization arranged on the first surface and in electric contact with the semiconductor body; and an insulation structure arranged between the gate electrode and the first metallization, the insulation structure comprising a silicon oxide layer adjoining an upper surface of the gate electrode, extending above the first surface and comprising a recess completely arranged within the gate electrode when seen from above, the insulation structure further comprising a silicon nitride region arranged in the recess and between the silicon oxide layer and the first metallization. - View Dependent Claims (23, 24, 25)
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Specification