Taiwan Semiconductor Manufacturing Company notified the U.S. a couple of weeks ago that one of its chips had been found in a Huawei device after a teardown by the tech research firm TechInsights, according to a person familiar with the matter. TechInsights informed TSMC about the chip in advance of publishing its findings in a report, the person said, and the chip company notified the U.S. Department of Commerce. TSMC said in a statement on Monday that it had proactively communicated with the Commerce Department regarding the matter.