The wafer sales were down 1.1 percent compared the 1Q18.

Total silicon wafer area shipments fell to 3,051 million square inches during the first quarter from 3,234 million square inches in the previous quarter.

“Some seasonality has returned and some inventory adjustments are being made. Despite this, silicon shipments remain at elevated levels,” said Neil Weaver, chairman of SEMI silicon manufacturing group and director of product development and applications engineering of Shin Etsu Handotai America.

The data includes polished silicon wafers, such as virgin test wafers and epitaxial silicon wafers, as well as non-polished silicon wafers shipped to end users. Silicon wafers come in sizes ranging from one inch to 300mm in diameter.

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