Patent ID: 7713106

Claim:
A device grinding method comprising the steps of: holding an undersurface of a protective member which supports a plurality of devices by affixing front surfaces of the plurality of devices onto a top surface of the protective member on a chuck table of a grinding machine; and grinding rear surfaces of the plurality of devices held on the chuck table through the protective member by a grinding means while the chuck table is rotated to form thicknesses of the plurality of the devices having a predetermined value, wherein a metering portion of a non-contact thickness metering equipment is brought to a position right above a rotating rotation locus of a predetermined device out of the plurality of devices held on the chuck table through the protective member, the rear surfaces of the plurality of devices are ground by the grinding means while the thickness of the rotating predetermined device is measured with the non-contact thickness metering equipment, and grinding by the grinding means is terminated when the thickness of the device measured with the non-contact thickness metering equipment reaches the predetermined value.