Patent ID: 7751911

Claim:
A failure alarm device, comprising: an operation instruction capturing unit, adapted to capture a start-operation instruction for a Chemical Mechanical Polishing (CMP) apparatus; an operation status signal capturing unit, adapted to capture an operation status signal indicative of whether the CMP apparatus is in a preset operation status, wherein the operation status signal comprises a signal indicative of pressing down or lifting of a substrate in the CMP apparatus for placing a wafer thereon, and wherein the preset operation status means the operation status in which a substrate in the CMP apparatus for placing a wafer thereon is pressed down and when the substrate in the CMP apparatus for placing a wafer thereon is lifted, it quits the preset operation status; and a timing and alarming unit, adapted to start timing when the operation instruction capturing unit captures a start-operation instruction for the CMP apparatus and the operation status signal capturing unit captures an operation status signal indicative that the CMP apparatus is in a preset operation status, and adapted to alarm if a duration of the operation status signal indicative of the CMP apparatus being in the preset operation status times out.