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US 12,733,240 B2Granted
Structure with self-aligned offset gate contact and direct backside contact
AssigneeInternational Business Machines Corporation
InventorsRuilong Xie, Brent A. Anderson, Albert M. Chu, Ravikumar Ramachandran
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Abstract
A semiconductor structure is provided that includes a self-aligned offset frontside gate contact structure and a direct backside source/drain contact structure. The presence of the off-centered frontside gate contact structure is attractive since it mitigates the risk of gate contact-to-source/drain contact shorts and it also improves the metal line, M1, spacing within the overlying frontside back-end-of-the-line (BEOL) structure.
Claims15
A semiconductor structure comprising:
- a transistor comprising a gate structure, a first source/drain region present on a first side of the gate structure and a second source/drain region present on a second side of the gate structure, wherein the second side of the gate structure is opposite the first side of the gate structure;
- a gate spacer located on the first side of the gate structure and a recessed gate spacer located on the second side of the gate structure, wherein the recessed gate spacer has a height that is less than the gate spacer;
- a dielectric cap located on a first surface of the second source/drain region;
- an off-centered frontside gate contact structure having a first portion located directly above, and in direct physical contact with, the gate structure of the transistor, and a second portion off-set relative to the gate structure and located directly on the dielectric cap;
- and
- a backside source/drain contact structure located on a second surface of the second source/drain region, wherein the second surface of the second source/drain region is opposite the first surface of the second source/drain region.
3 more elements
Dependencies are inferred from the claim text.