Helix Microinnovations v. NXP USA: CoB Patent Case Dismissed With Prejudice
Helix Microinnovations LLC asserted US7238550B2 — covering methods and apparatus for fabricating Chip-on-Board modules — against NXP USA, Inc. in the Western District of Texas. The plaintiff voluntarily dismissed all claims with prejudice after just 126 days, before NXP filed an answer, closing the case permanently.
CoB Patent Assertion Against NXP USA Ends Before First Answer
On May 21, 2025, Helix Microinnovations LLC — represented by Rabicoff Law LLC — filed an infringement action in the Western District of Texas against NXP USA, Inc., asserting US7238550B2, which covers methods and apparatus for fabricating Chip-on-Board modules. NXP USA, a major semiconductor and embedded processing company, was represented by Norton Rose Fulbright LLP. The case, assigned case number 7:25-cv-00241, targeted a foundational packaging technology widely used across the semiconductor industry.
On September 23, 2025 — just 126 days after filing — Helix filed a Notice of Voluntary Dismissal With Prejudice under Federal Rule of Civil Procedure 41(a)(1)(A)(i). Because NXP USA had not yet served an answer or motion for summary judgment, the dismissal was self-effectuating and required no court order. The court issued a confirmation order on September 24, 2025, directing each party to bear its own costs, expenses, and attorney fees. The with-prejudice designation is legally significant: Helix is permanently barred from re-asserting the same claims against NXP USA.
The 126-day duration — ending before NXP even filed a responsive pleading — is consistent with a plaintiff who reconsidered litigation viability early, possibly following pre-answer correspondence, a claim mapping review, or informal licensing discussions that did not result in a public settlement. The public record does not disclose whether any consideration was exchanged. The cost-neutrality order and the absence of a settlement agreement on the docket suggest the parties may have reached a private arrangement, or that Helix concluded the assertion lacked sufficient merit to proceed against NXP’s legal team.
Filing to Voluntary dismissal in 126 days
126 days — resolved before defendant’s answer was due, suggesting early strategic recalibration
Voluntary dismissal with prejudice: what each party’s position means
Rule 41(a)(1)(A)(i): self-effectuating dismissal, no court order needed
Fed. R. Civ. P. 41(a)(1)(A)(i) permits a plaintiff to dismiss an action unilaterally by filing a notice before the defendant serves an answer or a motion for summary judgment. Because NXP USA had not yet done either, Helix’s notice was self-effectuating — the case terminated automatically. The court’s September 24 order was confirmatory, not constitutive. The with-prejudice designation was Helix’s own election, making the dismissal more final than a default voluntary dismissal.
Rule 41(a)(1)(A)(i)With prejudice means Helix cannot re-sue NXP USA on these claims
A voluntary dismissal with prejudice operates as an adjudication on the merits under Rule 41(a)(1)(B), permanently extinguishing Helix’s right to re-assert US7238550B2 claims against NXP USA in any federal court. This is the most conclusive outcome short of a full merits ruling. Contrast this with a without-prejudice dismissal, which would allow re-filing. Helix’s election of the with-prejudice form strongly suggests either a private resolution or a strategic decision to permanently concede this particular defendant.
Permanent bar on re-filingNXP USA exits without answering — a strong procedural position
NXP USA avoided the cost and exposure of full litigation without filing an answer, motion to dismiss, or summary judgment motion. Norton Rose Fulbright’s engagement likely created early pressure on Helix’s claim mapping and infringement theory. NXP faces no damages liability, no injunction risk, and no public findings on validity or infringement. The with-prejudice dismissal also eliminates any future re-assertion risk from Helix on US7238550B2, giving NXP clean freedom to operate against this specific patent holder.
No liability, full FTOCoB packaging IP remains unlitigated — sector risk persists
The dismissal produces no claim construction ruling, no validity finding, and no infringement determination on US7238550B2. For other semiconductor companies using Chip-on-Board fabrication techniques, the patent’s enforceability remains an open question. Helix retains the right to assert US7238550B2 against other defendants. Companies in the CoB packaging supply chain — substrate manufacturers, OSAT providers, and embedded module makers — should note that this patent is still in force and has been actively asserted.
Patent still enforceable vs. othersFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Helix Microinnovations LLC | Company | Semiconductor IP licensing entity — holder of US7238550B2 covering CoB fabricationSearch in Eureka ↗ |
| Defendant | NXP USA, Inc. | Company | NXP USA, Inc. — U.S. subsidiary of NXP Semiconductors, embedded processing and RF ICsSearch in Eureka ↗ |
| Plaintiff counsel | Isaac Rabicoff | Attorney | Counsel for Helix Microinnovations LLCSearch in Eureka ↗ |
| Plaintiff law firm | Rabicoff Law LLC | Law Firm | Representing Helix Microinnovations LLCSearch in Eureka ↗ |
| Defendant counsel | Eric Conley Green | Attorney | Counsel for NXP USA, Inc.Search in Eureka ↗ |
| Defendant counsel | Richard S. Zembek | Attorney | Counsel for NXP USA, Inc.Search in Eureka ↗ |
| Defendant law firm | Norton Rose Fulbright LLP | Law Firm | Representing NXP USA, Inc.Search in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order confirms the dismissal was self-effectuating under Rule 41(a)(1)(A)(i) — no merits determination was made on infringement, validity, or claim scope. The with-prejudice designation was Helix’s unilateral election, not a court-imposed sanction, which distinguishes this outcome from a merits adjudication. The cost-neutrality direction is standard for pre-answer voluntary dismissals. NXP USA’s legal position is fully protected, while Helix permanently surrenders its right to assert these specific claims against this defendant.
US7238550B2 — Chip-on-Board module fabrication methods and apparatus
US7238550B2, filed under application number US10/371800, covers methods and apparatus for fabricating Chip-on-Board modules — a semiconductor packaging technique in which bare dies are directly mounted and wire-bonded onto a substrate or PCB without an intermediate package. CoB technology is widely used in cost-sensitive, high-density applications including LED modules, RFID devices, consumer electronics, and industrial sensors. The patent’s claim language around fabrication methods could potentially reach a broad range of CoB manufacturing processes depending on how the claims are construed.
For the semiconductor and electronics packaging sector, US7238550B2 represents a potentially broad assertion vehicle given the ubiquity of CoB technology across supply chains. NXP USA — whose product portfolio spans microcontrollers, RF transceivers, and automotive-grade ICs — was the target here, but the patent’s commercial reach could extend to OSATs, LED manufacturers, and module integrators. The absence of any claim construction ruling means the patent’s enforceable scope remains undefined by judicial determination, preserving both assertion value for Helix and residual uncertainty for the industry.
Should your team run an FTO analysis against US7238550B2?
Any company manufacturing, assembling, or contracting the production of Chip-on-Board modules — including bare-die attach, wire bonding, or encapsulation processes — should evaluate whether their process flows read on US7238550B2’s claims. This is particularly relevant for OSATs, LED module manufacturers, RFID device makers, automotive sensor producers, and electronics companies that source CoB-packaged components. The Helix v. NXP USA action confirms the patent is being actively asserted in U.S. federal court, and the with-prejudice dismissal does not limit risk to other market participants.
PatSnap Eureka’s FTO Search Agent allows R&D and IP teams to map your specific fabrication process steps against US7238550B2’s independent claims, identify prior art that may narrow enforceability, and benchmark against the patent’s prosecution history. Eureka can also surface related patents in Helix’s portfolio and flag similar CoB packaging patents that may present parallel assertion risk — giving your team a complete picture before committing to a new product architecture or manufacturing partnership.
Run a freedom-to-operate analysis on US7238550B2 to assess your product’s exposure
Run FTO in Eureka →Similar Chip-on-Board and semiconductor packaging patent cases
Cases involving semiconductor packaging patent assertions by NPEs in the Western District of Texas, with comparable pre-answer dismissal or early resolution patterns.
What this case signals for the semiconductor packaging IP landscape
A pre-answer dismissal with prejudice in a CoB patent case raises questions about assertion strategy and patent enforceability that practitioners should track.
Pre-answer exit suggests Helix faced early claim mapping challenges
Voluntary dismissal before the defendant files any responsive pleading — particularly with prejudice — is consistent with a plaintiff who encountered difficulties mapping patent claims to the accused products or processes. NXP USA’s retention of Norton Rose Fulbright likely accelerated that recalibration. Competitors facing similar assertions from Helix should scrutinise whether their products genuinely read on US7238550B2’s claim language.
US7238550B2 remains live — other CoB manufacturers face residual risk
The dismissal with prejudice only bars Helix from re-suing NXP USA. The patent itself is valid and enforceable against all other parties. Semiconductor packaging companies, OSATs, and module integrators using Chip-on-Board architectures should conduct a freedom-to-operate review against US7238550B2 and monitor Helix’s filing history for new actions across other defendants.
Helix v NXP — key questions answered
Helix Microinnovations LLC filed a patent infringement action against NXP USA, Inc. in the Western District of Texas on May 21, 2025, asserting US7238550B2 covering Chip-on-Board fabrication methods. On September 23, 2025 — 126 days later and before NXP filed any answer — Helix voluntarily dismissed all claims with prejudice under Rule 41(a)(1)(A)(i). Each party bears its own costs.
A voluntary dismissal with prejudice operates as a final adjudication on the merits under Rule 41(a)(1)(B). Helix is permanently barred from re-asserting US7238550B2 infringement claims against NXP USA in any federal court. However, the patent itself remains enforceable, and Helix retains the right to assert it against any other defendant not covered by this dismissal.
The public docket does not disclose any settlement agreement or payment. The court’s cost-neutrality order — directing each party to bear its own costs — is standard for pre-answer voluntary dismissals and does not confirm or rule out a private arrangement. The with-prejudice designation and absence of any sealed settlement entry suggest the dismissal may have reflected Helix’s strategic reassessment rather than a licensing resolution.
Yes. The dismissal with prejudice only extinguishes Helix’s claims against NXP USA specifically. US7238550B2 remains in force and has been actively asserted in federal court. Companies involved in Chip-on-Board fabrication — including OSATs, LED module makers, RFID device producers, and automotive sensor manufacturers — should conduct a freedom-to-operate analysis against this patent’s claims.
The Western District of Texas has been a preferred venue for patent assertion entities due to its historically expedited case schedules and plaintiff-friendly reputation following the rise of Waco division filings. Rabicoff Law LLC, plaintiff’s counsel, is associated with systematic patent assertion activity. The venue choice is consistent with an NPE assertion strategy targeting defendants with products likely sold or used in Texas.
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