You should spend about 20 minutes on this task The diagram shows the production of circuit boards Summarise the information by selecting and reporting the main features and make comparisons where relevant You should write at least 150 words

The diagram illustrates the process of producing circuit boards.

Overall, circuit-board production consists of nine stages, starting from delivery material. Three of the steps in the beginning are not repeated as well as last two steps.

The first step in production of circuit boards is delivery material to the lab. After that it requires to cut and spray with fire retardant. The third step is cleaning circuit board.

The fourth stage is automated ic attachment and soldering. The fifth step is visual inspection and quality control testing. visual inspection and quality control testing may be taken two decisions. if inspection and quality control rejects chips they will be thrown away. if inspection and quality control approves they go to the final testing.

Regarding to results of final testing it goes to the packing and delivery to factories or to automated ic attachment and soldering again. The cycle will be repeated until final testing will be agreed