Delta Electronics Shanghai Co Ltd v. Vicor Corp

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Delta Electronics (Shanghai) Co., Ltd. (People's Republic of China)
  • Defendant: Vicor Corporation (Delaware)
  • Plaintiff's Counsel: MORRIS, NICHOLS, ARSHT & TUNNELL LLP
• Case Identification: 1:26-cv-00913, D. Del., 07/24/2026
• Venue Allegations: Venue is alleged to be proper in the District of Delaware because the Defendant, Vicor Corporation, is incorporated in the State of Delaware.
• Core Dispute: Plaintiff alleges that Defendant's power converter components, when used in two-stage power delivery systems, infringe a patent related to the architecture for supplying power to a chip on a mainboard.
• Technical Context: The technology concerns high-efficiency power conversion for modern electronics, such as data center servers, where managing power delivery to high-performance processors is critical for performance and energy conservation.
• Key Procedural History: The complaint highlights an extensive and ongoing history of multi-forum patent litigation between Delta and Vicor, including multiple U.S. International Trade Commission (ITC) investigations and district court actions initiated by both parties between July 2023 and January 2026. Plaintiff leverages this history to support its allegations of pre-suit knowledge and willful infringement.

Case Timeline

Date	Event
2018-02-01	'853 Patent Priority Date
2020-11-24	'853 Patent Issue Date
2023-07-01	Approximate date Vicor initiated an ITC investigation and a parallel district court lawsuit against Delta
2023-10-01	Approximate date Delta filed a patent infringement suit against Vicor in the W.D. Tex.
2023-11-01	Approximate date Delta filed a patent infringement suit against Vicor in the D. Del.
2026-01-09	Vicor filed a patent infringement suit against Delta in the E.D. Tex.
2026-01-12	Vicor filed a complaint with the ITC against Delta
2026-07-24	Complaint Filing Date

II. Technology and Patent(s)-in-Suit Analysis

• Patent Identification: U.S. Patent No. 10,845,853, "System of Providing Power to Chip on Mainboard," issued November 24, 2020.
• The Invention Explained:
  • Problem Addressed: Modern processor chips require increasingly lower voltages and higher currents, which strains conventional power supply architectures Compl. ¶18 Placing a single, large power converter far from the chip to avoid interfering with high-speed signal paths results in significant transmission impedance, leading to power loss and voltage fluctuations under dynamic load conditions '853 Patent, col. 2:25-35 '853 Patent, col. 3:9-22
  • The Patented Solution: The patent describes a two-stage power delivery system that distributes the final conversion step. A single "preceding-stage" converter steps a high input voltage down to an intermediate bus voltage Compl. ¶18 '853 Patent, col. 8:13-18 This intermediate voltage is then fed to at least two smaller "post-stage" converters, which are placed on different sides of the processor chip and closer to it than the preceding-stage converter '853 Patent, abstract '853 Patent, FIG. 7 By splitting the final conversion task and shortening the power delivery paths, this parallel architecture reduces overall transmission impedance and improves the system's dynamic response '853 Patent, col. 8:51-64
  • Technical Importance: This distributed power architecture enables more stable and efficient power delivery to high-performance processors in dense electronic environments like data centers, improving overall system performance and energy efficiency Compl. ¶18 '853 Patent, col. 2:36-44
• Key Claims at a Glance:
  • The complaint asserts at least independent claim 1 Compl. ¶29 Compl. ¶47
  • The essential elements of independent claim 1 are:
    • A "preceding-stage power supply" on a mainboard that converts a first DC voltage to a second DC voltage.
    • A "first post-stage power supply" and a "second post-stage power supply" on the mainboard, both receiving the second DC voltage.
    • The first post-stage supply is "disposed at a first side of the chip", and the second is "disposed at a second side of the chip".
    • The distance from each post-stage supply to the chip is "less than or equal to" the distance from the preceding-stage supply to the chip.
    • The first post-stage supply provides a third DC voltage to the chip, and the second post-stage supply provides a fourth DC voltage to the chip.
  • The complaint does not explicitly reserve the right to assert dependent claims but states it may assert "additional and/or different claims" upon further discovery Compl. ¶33

III. The Accused Instrumentality

• Product Identification: The complaint identifies the "Vicor Accused Products" as material components of two-stage power delivery systems, with a specific example being the combination of a Vicor PRM™ Module (a high-power buck-boost regulator) and a VTM™ Current Multiplier (Model No. VTM48EF012T130C01) Compl. ¶¶29-31
• Functionality and Market Context:
  • The accused products are individual power converter components that Defendant Vicor allegedly markets and sells for its customers to combine into two-stage power delivery systems Compl. ¶30 Compl. ¶49 The complaint alleges the PRM™ module functions as the "preceding-stage power supply", while two or more VTM™ Current Multipliers function as the distributed "post-stage power supplies" Compl. ¶¶30-31
  • These systems are alleged to be used in high-end electronic devices, including computer servers Compl. ¶30 The complaint cites a Vicor article on "Vertical power delivery" to suggest Vicor promotes a "lateral power delivery" architecture that adopts the patented technology Compl. ¶32

IV. Analysis of Infringement Allegations

No probative visual evidence provided in complaint.

• Claim Chart Summary: The complaint references a claim chart in an exhibit that was not provided. The following table summarizes the infringement theory for Claim 1 based on the narrative allegations in the complaint.

'853 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
a preceding-stage power supply, located on the mainboard, being a DC-DC converter... configured to receive a first DC voltage and to provide a second DC voltage...	The Vicor PRM™ Module, described as a high-power buck-boost regulator, functions as the preceding-stage power supply in a two-stage system.	¶31	col. 8:13-18
a first post-stage power supply and a second post-stage power supply, located on the mainboard, and being DC-DC converters... electrically connected to the preceding-stage power supply, so as to receive the second DC voltage...	Two or more Vicor VTM™ Current Multipliers function as the post-stage power supplies, receiving the intermediate voltage from the PRM™ module.	¶30; ¶31	col. 8:19-26
the first post-stage power supply is disposed at a first side of the chip, the second post-stage power supply is disposed at a second side of the chip...	The accused two-stage systems created with Vicor's components allegedly position the post-stage supplies on different sides of the chip, consistent with Vicor's "lateral power delivery" architecture.	¶18; ¶32	col. 8:26-29
a distance on the mainboard between the first post-stage power supply and the chip is less than or equal to a distance on the mainboard between the preceding-stage power supply and the chip...	The accused systems allegedly position the post-stage VTM™ modules closer to the chip than the preceding-stage PRM™ module.	¶18; ¶32	col. 8:30-38
...a distance on the mainboard between the second post-stage power supply and the chip is less than or equal to the distance on the mainboard between the preceding-stage power supply and the chip...	The accused systems allegedly position the post-stage VTM™ modules closer to the chip than the preceding-stage PRM™ module.	¶18; ¶32	col. 8:30-38
the first post-stage power supply provides a third DC voltage to the chip... the second post-stage power supply provides a fourth DC voltage to the chip...	The first and second VTM™ Current Multipliers step down the intermediate voltage to supply power to the chip.	¶31	col. 8:38-43

• Identified Points of Contention:
  • Scope Question: A central issue may be the interpretation of "disposed at a first side of the chip, the second post-stage power supply is disposed at a second side of the chip." The claim does not specify "opposite" sides, and the patent discloses an embodiment with components on "adjacent sides" '853 Patent, col. 16:50-52 The question will be whether this language covers any two different sides or implies a more specific spatial separation, such as being on opposite sides as depicted in the patent's primary embodiment '853 Patent, FIG. 7
  • Technical Question: The complaint alleges infringement by systems created by Vicor's customers using Vicor's components Compl. ¶30 A key question for the court will be what evidence demonstrates that these final, assembled customer products actually meet the spatial and electrical limitations of the claims, such as the relative distances and the placement on different sides of the chip.

V. Key Claim Terms for Construction

• The Term: "disposed at a first side of the chip, the second post-stage power supply is disposed at a second side of the chip"
• Context and Importance: The definition of this term is critical for determining the scope of the claimed spatial arrangement. Vicor's infringement will depend on whether its recommended "lateral power delivery" architecture Compl. ¶32 falls within this definition. Practitioners may focus on this term because the patent specification includes embodiments showing both opposite and adjacent placement, creating a potential ambiguity for claim construction.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The patent discloses an embodiment where the post-stage supplies "are respectively located on two adjacent sides of the chip 1" '853 Patent, col. 16:50-52 '853 Patent, FIG. 18 This could support an interpretation where "a first side" and "a second side" means any two distinct sides, not necessarily opposite.
  • Evidence for a Narrower Interpretation: The description of the primary embodiment states that "the first side and the second side are opposite to each other" '853 Patent, col. 8:26-28 A party might argue that this represents the core invention and that "a second side" is best read in context as a side meaningfully separated from the first, such as an opposite one.

VI. Other Allegations

• Indirect Infringement: The complaint alleges induced infringement based on Vicor's active encouragement and instruction to customers to combine the accused components in an infringing manner Compl. ¶49 This is allegedly done through datasheets, technical articles, and direct customer collaboration Compl. ¶32 Compl. ¶49 Contributory infringement is alleged on the basis that Vicor's products are material components especially made for an infringing use and are not staple articles of commerce Compl. ¶50
• Willful Infringement: Willfulness is alleged based on Vicor's purported pre-suit knowledge of the '853 Patent Compl. ¶55 The complaint builds this allegation on Vicor's role as a direct competitor, its alleged practice of monitoring Delta's patent portfolio, and the extensive, multi-year patent litigation history between the two companies in the same technological field Compl. ¶¶19-27

VII. Analyst's Conclusion: Key Questions for the Case

• A core issue will be one of definitional scope: Can the claim phrase "disposed at a first side... [and] at a second side of the chip", be construed broadly to include placement on adjacent sides, as shown in a secondary patent embodiment, or will it be limited to the opposite-side arrangement depicted in the primary embodiment? The outcome of this construction could be dispositive of infringement.
• A second key issue will be evidentiary and related to divided infringement: As infringement is alleged to occur when customers assemble Vicor's components, a central question will be what evidence Plaintiff can present to prove that Vicor directs or controls its customers to combine the components in a manner that satisfies every limitation of the asserted claims, including the specific spatial arrangement.