Patent ID: 9576835
Date: 2017-02-21
CPC Classifications: H01L

Claim:
1. A method for processing a workpiece, the workpiece including a device region having at least one device formed on a top surface of the device region and a peripheral surplus region surrounding the device region, the workpiece having at least one projecting portion in the device region, the method comprising: a supporting plate preparing step of preparing a supporting plate having, on a top surface side of the supporting plate, a recessed portion configured to correspond to the device region of the workpiece and to house the projecting portion; a positioning step of mounting the workpiece on the supporting plate such that the recessed portion of the supporting plate and the device region of the workpiece correspond to each other, wherein the positioning step results in the workpiece being in direct contact with the supporting plate; a bonding step of forming a welded region in which the workpiece is welded to the supporting plate by irradiating the peripheral surplus region of the workpiece mounted on the supporting plate with a laser beam, whereby the workpiece is fixed on the supporting plate via the welded region; and a processing step of processing the workpiece after performing the bonding step; wherein the welded region is a region including a side surface of the workpiece mounted on the supporting plate; and wherein the welded region is formed by a laser processing head that is positioned outside of an outer circumference of the workpiece.