Taiwan Semiconductor Manufacturing Company Limited
Ex parte reexamination requester·7 ex parte reexams
Taiwan Semiconductor Manufacturing Company Limited has requested 7 USPTO ex parte reexaminations, with 7 currently open. It most often challenges patents owned by United Microelectronics Corp., Panasonic Corporation, and Advanced Integrated Circuit Process LLC. ExamPat indexes the full prosecution record for each proceeding, including office-action grounds, certificate outcomes, and downstream PTAB and Federal Circuit decisions.
Filings by year
Top patent owners challenged
Outcome track record
How this requester's challenges resolve: claims confirmed, amended, mixed, or fully canceled.
- Certificate outcome split across every bucket
- Share of challenges that canceled claims
Challenge metrics
Cancellation rate, average pendency, and the open/closed split across every reexam this requester has filed.
- Outcome rate of closed challenges
- Average pendency in months
Examiners & defense counsel
Which examiners decide this requester's challenges, and which firms defend the targeted patents.
- Most frequent examiners
- Top opposing counsel
Recent reexaminations (7)
| Control # | Filed | Patent | Title | Owner | Status |
|---|---|---|---|---|---|
| 90/015,942 | Feb 3, 2026 | 8,329,572 | SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME | Advanced Integrated Circuit Process LLC | Open |
| 90/015,750 | Dec 3, 2025 | 9,953,880 | SEMICONDUCTOR DEVICE AND METHOD FOR FABRICATING THE SAME | United Microelectronics Corp. | Open |
| 90/015,753 | Dec 3, 2025 | 9,093,473 | METHOD FOR FABRICATING METAL-OXIDE SEMICONDUCTOR TRANSISTOR | United Microelectronics Corp. | Open |
| 90/015,752 | Dec 3, 2025 | 9,147,747 | SEMICONDUCTOR STRUCTURE WITH HARD MASK DISPOSED ON THE GATE STRUCTURE | Marlin Semiconductor Limited | Open |
| 90/015,751 | Dec 3, 2025 | 9,184,292 | SEMICONDUCTOR STRUCTURE WITH DIFFERENT FINS OF FINFETS | United Microelectronics Corp. | Open |
| 90/015,704 | Nov 20, 2025 | 8,198,686 | SEMICONDUCTOR DEVICE | Panasonic Corporation | Open |
| 90/015,674 | Nov 12, 2025 | 8,907,425 | SEMICONDUCTOR DEVICE | Panasonic Corporation | Open |
See the full reexam picture for Taiwan Semiconductor Manufacturing Company Limited
Certificate outcomes, pendency, and the parties and examiners behind these cases. Free to sign up.