PCB board production for electronic products I. Task objectives ⑴ Ability objectives: Be able to use the existing equipment in the laboratory to produce single-sided and double-sided printed circuit boards. ⑵ Knowledge objectives: Be able to master the basic steps and processes of the two board making methods, be familiar with the board making equipment, and the matters that should be paid attention to in each step of the board making process. ⑶ Quality objectives: Cultivate the habit of doing things carefully, cultivate patience and carefulness in doing things, and cultivate a sense of teamwork. I. Work tasks This task is to use the existing equipment in the laboratory to make single-sided and double-sided boards. Through the specific implementation of this task, readers will be familiar with the methods and processes of the two board making methods. III. Task implementation In this task, the production of circuit boards mainly involves two methods, thermal transfer method and wet film etching method. Both methods belong to chemical corrosion methods. The following will introduce these two laboratory board making methods to readers in detail. Thermal transfer method: Thermal transfer method is mainly used to make single-sided boards in the laboratory. The equipment used includes computers, black and white inkjet printers such as HP1020, thermal transfer paper, thermal transfer machine, corrosion pool, chemical raw material ferric chloride, cutting machine, grinder, single-sided board. The main process is roughly divided into three steps. The first step is to print the PCB file designed by Protel99se on A4 paper with a smooth film on one side (thermal transfer paper) through a black and white inkjet printer; the second step is to transfer the PCB file on the paper to a single-sided board through a thermal transfer machine; the third step is to chemically etch the single-sided board. The following will take Task 2-1 as an example to explain the thermal transfer method in detail. ⑴ Printing drawings: Connect the HP printer to the computer and install the driver required by the printer to ensure that the printer can be used normally as shown in Figure 3-1; after connecting the printer, load A4 paper with a smooth film on one side (thermal transfer paper) into the printer, observe the paper under the sun, which side has the strongest reflection, which side has the film, when loading the paper, please load the side with the film upwards into the printer; run the PCB file generated by Task 2-1 on the computer, and according to step 11, print the bottom layer (BottomLayer) of the file on the thermal transfer paper, as shown in Figure 3-2.
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