BOSTON -- Teradyne Inc. is laying off 400 employees, or approx. 7% of its workforce, with the cuts falling on the semiconductor test unit. The division produced nearly half of Teradyne’s net bookings in the first quarter, according to a release published by the Boston Business Journal.

The company did not immediately specify what locations would be affected. In June it sold its PCB manufacturing unit in North Reading, MA, to a division of Solectron.

Teradyne expects to complete the current layoffs by the end of the year, and said it would record severance charges of approximately $12.7 million and $4 million, respectively, for the third and fourth quarters.