Prosecution Insights
Last updated: May 29, 2026
Application No. 17/734,975

POLYMER CROSSLINK DE-CROSSLINK PROCESSES FOR RESIST PATTERNING

Non-Final OA §102§103
Filed
May 02, 2022
Examiner
CHU, JOHN S Y
Art Unit
1737
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Taiwan Semiconductor Manufacturing Co., Ltd.
OA Round
4 (Non-Final)
77%
Grant Probability
Favorable
4-5
OA Rounds
0m
Est. Remaining
82%
With Interview

Examiner Intelligence

Grants 77% — above average
77%
Career Allowance Rate
743 granted / 963 resolved
+12.2% vs TC avg
Moderate +5% lift
Without
With
+5.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
36 currently pending
Career history
1026
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
75.1%
+35.1% vs TC avg
§102
13.2%
-26.8% vs TC avg
§112
6.4%
-33.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 963 resolved cases

Office Action

§102 §103
DETAILED CORRESPONDENCE This Office action is in response to the amendment received September 11, 2025. The rejection of claim(s) 1, 2, 4-9, and 16, 17, 19-20 are rejected under 35 U.S.C. 102(a) (1) as clearly anticipated by MARUYAMA et al (2019/0354013) is withdrawn in view of the amendment to claim 1 cancelling the structure: PNG media_image1.png 82 250 media_image1.png Greyscale 1,4-Bis((vinyloxy) methyl) cyclohexane The rejection under 35 U.S.C. 103 as being unpatentable over MARUYAMA et al (2019/0354013) and OHSAWA et al (2002/0076643) is withdrawn in view of the amendment to claim 1 canceling the structure: PNG media_image1.png 82 250 media_image1.png Greyscale 1,4-Bis((vinyloxy) methyl) cyclohexane New ground for rejection is made in view of the amendment. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale or otherwise available to the public before the effective filing date of the claimed invention. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries set forth in Graham v. John Deere Co., 383 U.S. 1, 148 USPQ 459 (1966), that are applied for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claim(s) 1, 2, 4-9, and 16, 17, and 19-22 are rejected under 35 U.S.C. 103 as being unpatentable over IMADA et al (2017/0260315) in view of TOIDA et al (202/0409261). The claimed invention now recites the following: PNG media_image2.png 630 646 media_image2.png Greyscale PNG media_image3.png 872 644 media_image3.png Greyscale PNG media_image4.png 214 668 media_image4.png Greyscale PNG media_image5.png 444 652 media_image5.png Greyscale PNG media_image6.png 668 624 media_image6.png Greyscale PNG media_image7.png 668 662 media_image7.png Greyscale IMADA et al discloses a photoresist composition comprising a photoacid, a crosslinking agent and a resin binder, see para. [0188] for a photoresist composition. The working examples lack the claimed crosslinking agent, however para. [0123] list known curing agents which may be contained in the photosensitive composition to include the following: PNG media_image8.png 166 360 media_image8.png Greyscale The highlighted compound has the following structure meeting the listed crosslinking agents in claim 1: PNG media_image9.png 234 1158 media_image9.png Greyscale TOIDA et al report a photoresist composition over an underlayer wherein the underlayer description is found in starting in para. [0307] to [0357]. The photoresist composition is reported in para. [0270] for the content of the optically active diazonaphthoquinone compound, and additive agents to include crosslinking agents as seen in para. [0269]. Claim 2 is met by the novolak resin in IMADA et al, para. [0026]. Claim 4 is met by the photoacid generated by exposure in IMADA et al. para. [0128]. Claim 5 is met by the para. [0190] in IMADA et al for a 1100 C prebake. Claim 6 is met by the presence of the photoacid generated by exposure. Claim 7 is met by the exposure reported in para. [0191] for g/h/I line exposure. Claim 8 and 9 is met by para. [0307] of TOIDA et al and para. [0370] to [0371] wherein etching is performed on the underlayer with the resist pattern as a mask. Claim 16, is met by the disclosure on page 17, para. [0190] in IMADA et al Claims 17 and 19 are inherently present in IMADA et al upon exposure to UV light and the curing temperature is reported in to the presence of the crosslinkers. Claim 20 for the Claim 21 is met by polyhydroxystyrene in para. [0095] of IMADA et al. Claim 22 is met by the method in para. [0487] for forming a positive resist pattern by development with TMAH in TOIDA et al. None of the claims above are allowed. It would have been prima facie obvious to one of ordinary skill in the art of photosensitive composition to duplicate the process of forming a pattern as reported in TOIDA et al containing as polyhydroxystyrene with any of the crosslinkers with a vinyl ether functional group as those found in IMADA et al such as a trimethylol trivinyl ether reported in in IMADA et al with the reasonable expectation of forming resist patterns which are rectangular and dimensional stable, with the photoresist being highly sensitive and forming high resolution patterns. Claims 10-15 are seen allowable over the prior art of record wherein the cited references lack the functional group Z to aldehyde and sulfonic acid in formula (I) of the method. Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to JOHN S CHU whose telephone number is (571)272-1329. The examiner can normally be reached M-F, IFP-Flex. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Mark Huff, can be reached at telephone number 571-272-1385. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://portal.uspto.gov/external/portal. Should you have questions about access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. /John S. Chu/ Primary Examiner, Art Unit 1737 J. Chu November 24, 2025
Read full office action

Prosecution Timeline

Show 9 earlier events
Aug 27, 2025
Applicant Interview (Telephonic)
Sep 11, 2025
Response Filed
Nov 28, 2025
Final Rejection mailed — §102, §103
Jan 13, 2026
Examiner Interview Summary
Jan 13, 2026
Applicant Interview (Telephonic)
Mar 30, 2026
Response after Non-Final Action
Apr 24, 2026
Request for Continued Examination
Apr 25, 2026
Response after Non-Final Action

Precedent Cases

Applications granted by this same examiner with similar technology

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Patent 12607936
FILM-FORMING COMPOSITION HAVING A MULTIPLE BOND
2y 9m to grant Granted Apr 21, 2026
Patent 12601975
COMPOSITIONS FOR REDUCING RESIST CONSUMPTION OF EXTREME ULTRAVIOLET METALLIC TYPE RESIST
4y 0m to grant Granted Apr 14, 2026
Patent 12585186
PHOTOACID GENERATOR, CHEMICALLY AMPLIFIED RESIST COMPOSITION, AND PATTERNING PROCESS
3y 5m to grant Granted Mar 24, 2026
Patent 12578646
ORGANOTIN OXIDE HYDROXIDE PATTERNING COMPOSITIONS, PRECURSORS, AND PATTERNING
1y 0m to grant Granted Mar 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

4-5
Expected OA Rounds
77%
Grant Probability
82%
With Interview (+5.2%)
2y 11m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 963 resolved cases by this examiner. Grant probability derived from career allowance rate.

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