1. Under the premise that each process can be produced, the assembly should be "squeezed" as much as possible. The so-called "squeezing" refers to reducing the distance between adjacent boards, thereby reducing the size of the entire assembly, saving production materials, and reducing production costs.

2. The spacing between single boards should be at least 2mm, which is to meet the requirement of placing positioning holes. In the mass production process, molding is generally done through die punching. In order to enhance the accuracy of die punching, positioning holes need to be placed between each piece in the assembly to avoid die punching deviation and FPC scrap; In the process of sample production, laser cutting is generally used for forming. In order to avoid slight deviation and prevent the occurrence of a single piece deviating from the entire piece, the individual pieces cannot be directly connected, so that they do not affect each other.

3. Etching characters need to be added to the assembly, providing a brief explanation of the assembly size, quantity, etc., in order to facilitate verification and verification in subsequent production.

4. Add positioning holes at the four corners of the entire assembly, and select one corner to label different positioning holes, so as to maintain consistent direction in subsequent production processes, so as not to cause sealing film sticking back, character printing back, and other situations.

5. The width of the assembly is fixed at 250mm, and the length should be within 250mm as much as possible. The larger the assembly size, the greater the offset, the poorer the production accuracy, and the higher the defect rate of the finished product.