Low-quality semiconductors, such as imitations of major manufacturers’ products, are likely circulating widely across Japan, a survey by a testing firm has indicated, raising concern over an increase of defective items using such components amid a global chip shortage.

More than 30% of the semiconductors, which Oki Engineering Co. checked upon the requests of over 100 companies, were imitations, used chips passed off as new or defective, the firm said.

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