Abstract: In order to prepare the flat air pore canal of the lambda sensor chip, the method of screen printing was used. A suitable carbon slurry was prepared, and the optimum conditions were as follows: activated carbon and terpineol were chosen, the grading was m_Φ6.5∶m_Φ3 =1∶2, ball milling time was 12 h, dispersant content was 30%, rubber content was 5%. Under the optimal conditions, the smooth and stable air duct was prepared. The method has the advantages of high precision, controllable shape, low cost and simple operation.

Key words: air pore canal, lambda sensor, carbon slurry, activated carbon