Patent ID: 8062960
Filing Date: 2011-11-22
Classification: B23K,H01L

Abstract:
1. A method of manufacturing a compound semiconductor device comprising: a device forming step of forming a plurality of device portions on a main surface of a substrate in a matrix in a first direction and a second direction that is orthogonal to the first direction, thereby forming a wafer; and a division step of dividing the wafer into the device portions, thereby forming the compound semiconductor devices, wherein the division step includes: a first division step of dividing the wafer in the first direction to obtain first strip wafers each having at least two rows of the device portions arranged in the first direction; a second division step of dividing the first strip wafer in the second direction to obtain second strip wafers each having a row of the device portions arranged in the second direction; a third division step of dividing the second strip wafer into the device portions, thereby forming the compound semiconductor devices including the device portions; and a partition step of forming half cut grooves for separating the device portions in the main surface of the substrate in the first and second directions between the device forming step and the division step, wherein, in the division step, a knife is pressed against the wafer along the half cut grooves such that cracks occur along the half cut grooves, thereby dividing the wafer into the first strip wafers or the second strip wafers.