What contents must be filled in in an application for a patent for invention?

1. technical field: specify the technical field to which the technical scheme to be protected belongs; 2. Background technology: state the background technology that is helpful for understanding, searching and examining the invention or utility model; It is possible to quote the literature reflecting these background technologies; 3. Content of the invention: state the technical problems to be solved by the invention or utility model and the technical scheme adopted to solve the technical problems, and state the beneficial effects of the invention or utility model relative to the existing technology; 4. Description of drawings: If there are drawings in the specification, please give a brief description of each drawing; 5. Specific mode: explain in detail the preferred mode of realizing the invention or utility model that the applicant thinks; If necessary, give examples; If there are drawings, refer to the drawings.