The U.S. Court of Appeals for the Federal Circuit ruled on October 30, 2026, affirming the validity of a patent held by BeSang Inc. This decision affects major technology companies, including Micron Technology Inc. and Intel Corporation, which had challenged the patent's legitimacy. The ruling is significant as it confirms the patent's protection over certain semiconductor memory technologies, impacting the competitive landscape in the tech industry.

The case, identified by docket number 25-1320, involved appeals from both Micron and Intel against decisions made by the United States Patent and Trademark Office's Patent Trial and Appeal Board (PTAB). The Board had previously determined that claims related to BeSang's U.S. Patent 7,378,702 were not unpatentable, leading to the current appeals.

Background

Micron Technology Inc., along with its subsidiaries Micron Semiconductor Products Inc. and Micron Technology Texas LLC, initiated the appeal process against BeSang Inc. after the PTAB ruled in favor of BeSang's patent claims. Intel Corporation also filed a separate appeal regarding the same patent. The dispute centers around the validity of claims 1 and 13-17 of the '702 patent, which covers a semiconductor memory structure designed to enhance the efficiency of memory devices.

The '702 patent specifically describes a semiconductor memory structure that incorporates vertically oriented memory cells aimed at reducing the lateral area of transistors on a chip. Both Micron and Intel argued that the claims in question were obvious based on prior art, asserting that the technology was not novel and should not have received patent protection.

The Ruling

The Federal Circuit upheld the PTAB's decisions, affirming that the claims of the '702 patent were valid. The court stated, "Micron did not meet its burden to show that claim 13 would have been obvious over Watanabe or the combination of Watanabe and the Lee Patent." This ruling indicates that the court found substantial evidence supporting the Board's conclusions regarding the patent's novelty and non-obviousness.

In addressing Micron's arguments, the court noted that the Board had determined Watanabe was not enabled as prior art due to its high processing temperatures, which could damage electronic components. The court emphasized that, without enabling prior art, a claim cannot be deemed obvious. Similarly, the court affirmed the Board's findings regarding Intel's challenges, stating that Intel failed to demonstrate that the claims were unpatentable based on the prior art it presented.

Impact

The court's ruling has significant implications for the semiconductor industry. By affirming the validity of BeSang's patent, the decision reinforces the importance of intellectual property rights in technology innovation. Companies like Micron and Intel, which invest heavily in research and development, must navigate the complexities of patent law as they seek to innovate within the constraints of existing patents.

This ruling may also influence future patent litigation, as it underscores the necessity for challengers to provide compelling evidence when arguing that a patent is invalid. The affirmation of BeSang's patent could deter similar challenges from other companies, reinforcing the patent's protective status in the competitive semiconductor market.

What's Next

While the ruling is final, it is possible that Micron and Intel could seek further appeals or explore alternative legal avenues regarding the patent. However, details were not available in the court filing regarding any pending related cases. The outcome of this case may also lead to increased scrutiny of other patents in the semiconductor field as companies assess their own technologies in light of this decision.