The claim under review

The claim, originally phrased in Korean as "the 'SK hynix monopoly' has ended for Hanmi Semiconductor," reflects a market narrative that has gathered pace: that Hanmi Semiconductor, long characterized as a de facto captive supplier to SK hynix, has broken out of a one-client dependency. For years, that dependency was treated as a defining feature of the company's business profile, which is why any loosening of the tie carries weight for investors and for the broader Korean semiconductor equipment sector.

How the claim was verified

The review rested on primary sources — 11 in total — rather than on secondary media coverage. Filings were examined on a per-document basis, with each document identified through its unique receipt number (rcpNo) instead of relying on aggregated summaries. The process was not friction-free: the disclosure system's detailed per-document viewer proved unstable due to its session-based login behavior. To keep the verification on firm ground, reviewers directly confirmed the disclosure list and the receipt dates of the documents consulted.

What the documents showed

On the disclosed record, the filings reviewed support the central assertion. The relationship between Hanmi Semiconductor and SK hynix no longer fits the definition of a monopoly — that is, exclusive and one-sided dependence on a single customer. At the same time, the qualified nature of the judgment signals that the shift, while real in the documents reviewed, was not shown to be total or entirely beyond question.

The bottom line

The strength of this fact-check lies in its method: primary filings, examined document by document, with the disclosure list and receipt dates confirmed directly despite technical instability in the viewing interface. On the weight of the 11 primary sources reviewed, the claim that the "SK hynix monopoly" at Hanmi Semiconductor has ended is judged Mostly True.