Patent ID: 7598110

Claim:
A method comprising: forming a photodiode, a source/drain area, and a gate electrode over a semiconductor substrate; forming a salicide blocking layer over the photodiode, the source/drain area, and the gate electrode; forming a photoresist pattern over the salicide blocking layer, wherein a border of the photoresist pattern has an inclination angle less than 90° over the gate electrode and the photoresist pattern is formed over the photodiode; etching the salicide blocking layer using the photoresist pattern as an etch mask; and forming salicide on the source/drain area and the gate electrodes, wherein said etching is wet-etching, wherein said wet-etching comprises: etching the salicide blocking layer while rotating the semiconductor substrate in a first direction; and etching the semiconductor substrate while rotating the semiconductor substrate in a second direction, wherein the second direction is opposite to the first direction.