Losses narrowed sharply at

Kulicke & Soffa

(KLIC) - Get Report

in the fourth quarter, but charges continued to be a drag on earnings.

The Willow Grove, Pa.,-based company lost $28.4 million, or 57 cents a share, on revenue of $129.3 million in the quarter ended Sept. 30, compared with a loss of $195 million, or $3.95 a share, on sales of $122.2 million a year ago.

The Thomson First Call consensus, which almost certainly is not on a basis comparable to Kulicke's bottom line, was for a loss of 11 cents a share.

Shares of the semiconductor equipment maker plunged $1.19, or 7.5%, to $14.75 in premarket trading.

The company reported more than $21 million in write-downs and other charges during the quarter.

The company raised revenue guidance for the current quarter, forecasting sales of $142.5 million to $157. 5 million, up from $11.4 million a year ago and the average analyst estimate of $135.7 million.