Invalidity dossier
US 7485934
Integrated semiconductor structure for SRAM cells
Current assignee: Taiwan Semiconductor Manufacturing Co TSMC Ltd
Added 9/23/2026, 9:29:06 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US 7,485,934 B2
Title: Integrated semiconductor structure for SRAM cells
Patent number / application: US 7,485,934 B2; Application US 11/257,572
Inventor: Jhon-Jhy Liaw
Assignee: Taiwan Semiconductor Manufacturing Co., Ltd. (TSMC)
Key dates: Priority/filing date 2005-10-25; published as US 2007/0090428 A1 on 2007-04-26; granted 2009-02-03. Google Patents lists adjusted expiration 2026-08-04 and status "Active" (noted as an assumption, not a legal conclusion). Related priority filings: TW 095109587 A and CN 2006100735022 A.
Purpose: Per the supplied text, the invention relates to IC designs and more particularly to a semiconductor structure for "reducing a gate resistance while providing a self-aligned silicide contact for a static random access memory (SRAM) cell."
Plain-language scope: The structure includes a semiconductor substrate with first and second device areas. A gate layer runs across both areas; a first portion over the first device area is doped with impurities of a first type, and a second portion over the second device area is doped with a second, different type. A cap layer on the gate layer protects the gate from silicide formation but has at least one opening at the junction of the two portions. Silicide formed in that opening lowers resistance at the junction between the differently doped gate portions. The SRAM cell (two cross-coupled inverters with pull-up, pull-down, and pass-gate transistors) is used to demonstrate the invention; the layout is described through readiness for metal 1 deposition, with intra-cell connections including an L-shaped pad.
Source: https://patents.google.com/patent/US7485934/en
What the excerpt does not establish: It does not provide the full claims, the complete description, or the listed prior-art references; the images and much of the text were omitted. It therefore cannot establish the precise claim scope, the examiner's basis for allowance, or the full embodiment details. Legal status and expiration are explicitly assumptions in the source.
Generated 10/1/2026, 9:34:17 PM
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Litigation summary
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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