Abstract: There is provided a method of determining whether or not a result of a processing process of a laser processing apparatus is acceptable including a laser processing step of applying a laser beam to predetermined processing regions of a workpiece held on a chuck table, thereby performing a piercing process on the workpiece, an image capturing step of capturing images of all the processing regions while moving the image capturing unit and the workpiece relatively to each other, a detecting step of detecting regions where light is not transmitted through the workpiece among the processing regions in the image captured in the image capturing step, and a determining step of determining that the laser processing apparatus needs to be readjusted if the regions where light is not transmitted through the workpiece is equal to or more than the predetermined quantity.

Abstract: A cleaning method for cleaning a frame unit including an affixed object, a tape affixed to an undersurface of the affixed object, and an annular frame to which an outer peripheral portion of the tape is affixed, the cleaning method including: an affixed object cleaning step of cleaning the affixed object by jetting a cleaning liquid from a cleaning nozzle while moving the cleaning nozzle in a reciprocating manner along a path extending from above one end of an outer peripheral edge of the affixed object to above another end of the outer peripheral edge of the affixed object; and a frame cleaning step of cleaning the frame by jetting the cleaning liquid from the cleaning nozzle to the frame.

Abstract: There is provided a method of determining whether or not a result of a processing process of a laser processing apparatus is acceptable including a laser processing step of applying a laser beam to predetermined processing regions of a workpiece held on a chuck table, thereby performing a piercing process on the workpiece, an image capturing step of capturing images of all the processing regions while moving the image capturing unit and the workpiece relatively to each other, a detecting step of detecting regions where light is not transmitted through the workpiece among the processing regions in the image captured in the image capturing step, and a determining step of determining that the laser processing apparatus needs to be readjusted if the regions where light is not transmitted through the workpiece is equal to or more than the predetermined quantity.

Abstract: A cleaning method for cleaning a frame unit including an affixed object, a tape affixed to an undersurface of the affixed object, and an annular frame to which an outer peripheral portion of the tape is affixed, the cleaning method including: an affixed object cleaning step of cleaning the affixed object by jetting a cleaning liquid from a cleaning nozzle while moving the cleaning nozzle in a reciprocating manner along a path extending from above one end of an outer peripheral edge of the affixed object to above another end of the outer peripheral edge of the affixed object; and a frame cleaning step of cleaning the frame by jetting the cleaning liquid from the cleaning nozzle to the frame.

Abstract: A protective film forming method for forming a protective film of resin on a work surface of a wafer.