Prosecution Insights
Last updated: October 02, 2026
Application No. 18/598,782

THREE-DIMENSIONAL MEMORY DEVICE INCLUDING MULTI-TIER TRENCH BRIDGE STRUCTURES AND METHODS FOR FORMING THE SAME

Non-Final OA §112
Filed
Mar 07, 2024
Examiner
MCCALL SHEPARD, SONYA D
Art Unit
2898
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
SanDisk Technologies Inc.
OA Round
1 (Non-Final)
93%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 93% — above average
93%
Career Allowance Rate
1110 granted / 1196 resolved
+24.8% vs TC avg
Minimal +4% lift
Without
With
+3.5%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 0m
Avg Prosecution
42 currently pending
Career history
1208
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
50.4%
+10.4% vs TC avg
§102
33.0%
-7.0% vs TC avg
§112
13.3%
-26.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1196 resolved cases

Office Action

§112
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Election/Restrictions Applicant’s election without traverse of Group I, claims 1-12 in the reply filed on 04 June 2026 is acknowledged. Claims 13-20 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-13 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 1 recites the limitation “the insulating layers” in lines 14-15. There is insufficient antecedent basis for this limitation in the claim. Allowable Subject Matter Claim 1 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. The following is a statement of reasons for the indication of allowable subject matter: the prior art of record neither anticipates nor renders obvious, in the context of the claims: wherein each lengthwise sidewall of the lateral isolation cavity comprises first vertically-straight and laterally-concave surface segments of the first-tier structure that are adjoined to each other at first vertically-extending edges; and a lateral isolation trench fill structure located in the lateral isolation trench, wherein the lateral isolation trench fill structure comprises: first-tier bridge structures comprising a different material from the insulating layers wherein each of the first-tier bridge structures has a respective set of at least one vertically-extending perforation therethrough; and an insulating spacer continuously extending over sidewalls of the lateral isolation cavity. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to SONYA D MCCALL-SHEPARD whose telephone number is (571)272-9801. The examiner can normally be reached M-F: 8:30 AM-5:00 PM. 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. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Julio J. Maldonado can be reached at (571)272-1864. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /Sonya McCall-Shepard/Primary Examiner, Art Unit 2898
Read full office action

Prosecution Timeline

Mar 07, 2024
Application Filed
Jun 29, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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3y 9m to grant Granted Sep 29, 2026
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Patent 12751181
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2y 11m to grant Granted Sep 29, 2026
Patent 12745617
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Patent 12733272
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2y 9m to grant Granted Sep 08, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
93%
Grant Probability
96%
With Interview (+3.5%)
2y 0m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1196 resolved cases by this examiner. Grant probability derived from career allowance rate.

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