Prosecution Insights
Last updated: April 19, 2026
Application No. 18/096,039

SURFACE FINISH STRUCTURE OF MULTI-LAYER SUBSTRATE

Non-Final OA §103
Filed
Jan 12, 2023
Examiner
THOMPSON, TIMOTHY J
Art Unit
2847
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Princo Corp.
OA Round
3 (Non-Final)
84%
Grant Probability
Favorable
3-4
OA Rounds
2y 6m
To Grant
64%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allow Rate
232 granted / 275 resolved
+16.4% vs TC avg
Minimal -21% lift
Without
With
+-20.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
34 currently pending
Career history
309
Total Applications
across all art units

Statute-Specific Performance

§103
53.9%
+13.9% vs TC avg
§102
36.0%
-4.0% vs TC avg
§112
6.3%
-33.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 275 resolved cases

Office Action

§103
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 . Note, the restriction has been withdrawn. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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 text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claim(s) 1-8 is/are rejected under 35 U.S.C. 103 as being unpatentable over Cho et al.(US 2021/0090902) in view of Hsich et al.(US 2011/0042794). Regarding claim 1, Cho et al. discloses a multi-layer substrate(fig 5, 110, 120a, 120b)), a dielectric layer(fig 2, 111); at least one pad layer formed in the dielectric layer(fig 2, 120); and at least one protective metal layer formed on the at least one pad layer and bonded to the at least one pad layer(fig , 130), wherein the at least one protective metal layer only covers an upper surface of the at least one pad layer(fig 2), the at least one protective metal layer is configured to contact an external element (fig 2, 195, as well as the protective layer shown in figure 2, top surface, yet not labeled or discussed in the specification), there is no height difference between an upper surface of the at least one protective metal layer and an upper surface of the dielectric layer(fig 2). Cho et al. shows in fig 2 a surface finish structure of the multi-layer substrate is completely bonded to a surface of the external element( the structure surrounding element 190 and mating with layer 160) without any gap without discussing this aspect of the invention in the specification). Additionally, Hsich et al. discloses a surface finish structure of the substrate(fig 10, the surface of 40) is completely bonded to a surface of the external element(fig 10, 30). It would have been obvious to one skilled in the art at the time of the invention to use a surface finish structure of the multi-layer substrate that is completely bonded to a surface of the external element so as to protect the surface components of the circuit board. Regarding claim 2, Cho et al. discloses wherein a material of the dielectric layer is polyimide(para0071). Regarding claim 3, Cho et al. discloses wherein a material of the at least one pad layer is copper.(para 0025). Regarding claim 4, Cho et al. discloses wherein a material of the at least one protective metal layer is selected from the group consisting of chromium, nickel, palladium, and gold(para 0088). Regarding claim 5, Cho et al. discloses a dielectric layer(fig 2, 111); at least one pad layer(fig 2, 120), wherein a part of the at least one pad layer is formed in the dielectric layer(fig 2); and at least one protective metal layer formed on the at least one pad layer and bonded to the at least one pad layer(fig 2, 130), wherein the at least one protective metal layer only covers an upper surface of the at least one pad layer(fig 2), the at least one protective metal layer is configured to contact an external element fig 2, 195, as well as the protective layer shown in the figure, top surface, yet not labeled or discussed in the specification), there is no height difference between an upper surface of the at least one protective metal layer(fig 2, 130) adjacent to the dielectric layer(fig 2, 160). an upper surface of the dielectric layer, and the surface finish structure of the multi-layer substrate is completely bonded toa surface of the external element without any gap. Cho et al. shows in fig 2 an upper surface of the dielectric layer, and the surface finish structure of the multi-layer substrate is completely bonded toa surface of the external element without any gap(the structure surrounding element 190 and mating with layer 160) without any gap without discussing this aspect of the invention in the specification). Additionally, Nakunura et al. discloses an upper surface of the dielectric layer, and the surface finish structure of the multi-layer substrate (fig 4, the surface of 10) is completely bonded to a surface of the external element without any gap (fig 4, 44; para 53, 0054). It would have been obvious to one skilled in the art at the time of the invention to use a surface finish structure of the multi-layer substrate that is completely bonded to a surface of the external element without any gap so as to protect the surface components of the circuit board. Regarding claim 6, Cho et al. discloses wherein a material of the dielectric layer is polyimide(para0071). Regarding claim 7, Cho et al. discloses wherein a material of the at least one pad layer is copper.(para 0025). Regarding claim 8, Cho et al. discloses wherein a material of the at least one protective metal layer is selected from the group consisting of chromium, nickel, palladium, and gold(para 0088). Claim(s) 9-12 is/are rejected under 35 U.S.C. 103 as being unpatentable over Cho et al.(US 2021/0090902) In view of Hsich et al.(US 2011/0042794) and further in view of Cho et al.(US 2016/0225706) herein in after “Cho2”. Regarding claim 9, Cho et al. does not disclose wherein an upper surface of a remaining part of the at least one protective metal layer excluding the upper surface of the at least one protective metal layer adjacent to the dielectric layer is a protrusion shape or a recessed shape. However Cho2 discloses a pad (fig 2, 105) with in the insulating layer with a recessed shape(fig 2, 110). It would have been obvious to one skilled in the art at the time of the invention to place a recess in the middle of the pad as shown by Cho2, with a modified Cho since this is a way to better control the solder from straying form the pad. Regarding claim 10, Cho et al. discloses wherein a material of the dielectric layer is polyimide(para0071). Regarding claim 11, Cho et al. discloses wherein a material of the at least one pad layer is copper.(para 0025). Regarding claim 12, Cho et al. discloses wherein a material of the at least one protective metal layer is selected from the group consisting of chromium, nickel, palladium, and gold(para 0088). Any inquiry concerning this communication or earlier communications from the examiner should be directed to Timothy Thompson whose telephone number is (571)272-2342. The examiner can normally be reached Monday-Friday 8:00 AM-4:30 PM EST. 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. 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. /TIMOTHY J THOMPSON/Supervisory Patent Examiner, Art Unit 2847
Read full office action

Prosecution Timeline

Jan 12, 2023
Application Filed
Nov 16, 2024
Non-Final Rejection — §103
May 19, 2025
Response Filed
Aug 06, 2025
Final Rejection — §103
Feb 01, 2026
Request for Continued Examination
Feb 09, 2026
Response after Non-Final Action
Feb 12, 2026
Non-Final Rejection — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12603426
INTEGRATED ANTENNA STRUCTURE
2y 5m to grant Granted Apr 14, 2026
Patent 12588146
CLUSTERED MICROVIA STRUCTURE FOR A HIGH-DENSITY INTERFACE PCB
2y 5m to grant Granted Mar 24, 2026
Patent 12588139
WIRING BOARD AND METHOD FOR MANUFACTURING WIRING BOARD
2y 5m to grant Granted Mar 24, 2026
Patent 12573783
Connector Cover Having Integral TPA (Terminal Position Assurance) Features
2y 5m to grant Granted Mar 10, 2026
Patent 12550246
CIRCUIT BOARD STRUCTURE AND MANUFACTURING METHOD THEREOF
2y 5m to grant Granted Feb 10, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

3-4
Expected OA Rounds
84%
Grant Probability
64%
With Interview (-20.6%)
2y 6m
Median Time to Grant
High
PTA Risk
Based on 275 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month