Patent ID: 8858817

Claim:
An exception handling method, comprising: monitoring a working status of both a grinding device and a cleaning device in a polishing apparatus to provide detected data, wherein the grinding device includes an exception monitoring device placed in the grinding device, and the cleaning device includes an exception monitoring device placed in the cleaning device; sending back detected data from the exception monitoring device in the grinding device or from the exception monitoring device in the cleaning device; determining, by a polishing apparatus control computer, which device in the polishing apparatus generates an exception; and if an exception is detected from the grinding device, the exception including an exception of a pressure or a rotation speed of a grinding head, sending a first alarm signal from the alarm unit to a processing unit in the polishing apparatus; in response to the first alarm signal, controlling, by the processing unit, a spray nozzle of the grinding device to spray an organic acid solution to a wafer on a platen; and after the wafer has been grinded and before the wafer has been delivered to the cleaning device, controlling, by the processing unit, a spray nozzle of the head clean load/unload to spray the organic acid solution to the wafer in the head clean load/unload; or if the exception is detected from the cleaning device; sending a second alarm signal from the alarm unit to the processing unit in the polishing apparatus; and in response to the second alarm signal, controlling, by the processing unit, the grinding device, the cleaning device, and the head clean load/unload to process: the wafer in the grinding device, and the wafer in the head clean load/unload after grinding, and then the wafer in the cleaning device, with the organic acid solution.