How to make a circuit board? Simple circuit board manufacturing method

1. Print the circuit board Print the drawn circuit board with transfer paper, pay attention to the slippery side facing yourself, and generally print two circuit boards, that is, two circuit boards on one paper. Among them, select the best printed circuit board to make the printed board. 2. Cutting copper clad laminates and using photosensitive boards to make circuit boards.

Copper clad laminates, that is, circuit boards covered with copper film on both sides, cut the copper clad laminates to the size of circuit boards, not too large, in order to save materials. 3. Pretreatment of copper clad laminate Use fine sandpaper to polish off the oxide layer on the surface of the copper clad laminate to ensure that the toner on the thermal transfer paper can be firmly printed on the copper clad laminate when transferring the circuit board, and the standard of polishing is that the board surface is bright and there are no obvious stains. Fourth, the transfer circuit board cut the printed circuit board to a suitable size, the side of the printed circuit board on the copper clad laminate plate, after alignment, put the copper clad laminate into the heat transfer machine, when putting in must ensure that the transfer paper is not misplaced.

Generally speaking, after 2-3 transfers, the circuit board can be transferred to the copper clad laminate very firmly. The heat transfer machine has been preheated in advance, and the temperature is set at 160-200 degrees Celsius, because the temperature is very high, pay attention to safety when operating! Fifth, corroded circuit board first check whether the circuit board is fully transferred, if there are a few places that are not transferred well, you can use a black oil-based pen to repair.

Then it can be corroded, and when the exposed copper film on the circuit board is completely corroded, the circuit board is taken out of the corrosive liquid and cleaned, so that a circuit board is corroded. The composition of the corrosive fluid is concentrated hydrochloric acid, concentrated hydrogen peroxide, and water, with a ratio of 1:2

3. When preparing the corrosive liquid, put water first, and then add concentrated hydrochloric acid and concentrated hydrogen peroxide, if the concentrated hydrochloric acid, concentrated hydrogen peroxide or corrosive liquid accidentally splashed on the ** or clothes during operation, it should be cleaned with clean water in time, due to the use of strong corrosive solution, you must pay attention to safety during operation! 6. Drilling of circuit board Electronic components are to be inserted into the circuit board, so it is necessary to drill holes in the circuit board. Choose different drill needles according to the thickness of the pins of electronic components, when using the drilling rig to drill holes, the circuit board must be pressed steadily, and the speed of the drilling rig can not be opened too slowly, please carefully watch the operator's operation.

7. Pretreatment of circuit board After drilling, use fine sandpaper to polish off the toner on the road board, and clean the circuit board with clean water. After the water dries, apply rosin perfume to the side with the line, in order to speed up the solidification of rosin, we use a hot air blower to add ** road plate, and it only takes 2-3 minutes for rosin to solidify.

Take a look at the encyclopedia of circuit board making.

The simple circuit board manufacturing method is as follows:

1. Depiction.

1. Draw a PCB diagram on the Protel software.

2. Print with a printer.

3. Prepare copper clad laminates of the same size.

4. Take a copy of carbon paper (similar to the blue paper used for invoicing), and copy the PCB diagram printed on ordinary white paper to the copper plate through a ballpoint pen.

5. Describe, take a very fine oily marker, and depict the lines that have just been copied to the copper plate, and if the graphics are not obvious enough at one time, you can repeat the description to ensure that the lines of the depicted part are not broken. It is also important to note that care must be taken when drawing PCB drawings to prevent lines that do not intersect from being glued together due to carelessness.

6. Configure corrosive liquid to corrode the circuit board, you can use electrolysis, hydrogen peroxide + concentrated hydrochloric acid + water, ferric chloride solution and other methods to corrode the copper clad laminate.

7. Use a drilling machine to punch the circuit board, we recommend using a micro bench drill to punch with high precision.

Second, the photosensitive plate method.

1. Use software to draw PCB circuit diagrams.

2. Take a piece of film paper, and print the PCB drawing on the film paper through a laser printer, and cut off the excess film part with scissors after printing.

3. Take the material, according to the size slightly larger than the PCB drawing, from the large photosensitive plate. Lift the film on the photosensitive plate to see the green ink, at this time immediately cover the printed PCB plate-making film on the photosensitive plate, ready**.

4. **, use two pieces of glass to sandwich the photosensitive plate and plate-making film in the middle, keep it flat, and then place it under the fluorescent lamp. The standing time is generally between 15-20 minutes, of course, this is only a reference value, ** time and light intensity, and the distance from the light source are closely related, if you use ultraviolet light, the time is shorter. Therefore, the specific time should also be determined according to your actual situation.

5. Configure the developer, the developer and water are configured in proportion, stir continuously in the water with chopsticks, and place the photosensitive plate in it after the developer particles are all dissolved, and constantly shake the photosensitive plate, and carefully observe that the green ink is slowly dissolved, and the copper foil is constantly exposed. And the line is also constantly displayed, and the development time is generally about 5 minutes.

First of all, you need to use circuit design software such as Protel to draw the circuit schematic diagram and PCB (component package diagram) on the computer. As shown below:

2.Put the thermal transfer paper into the ordinary printer, adjust the appropriate printing ratio, and print out the black and white PCB drawing. As shown below:

3.Use sandpaper to polish off the oxide layer on the surface of the copper clad laminate to make the copper clad laminate look smooth and shiny. As shown below:

4.The heat transfer paper printed with the PCB diagram in step 2 is fixed on the copper clad laminate polished in step 3, and sent to the heat transfer machine (you can also use a common heating iron to replace the heat transfer machine) for printing, so that the toner containing the PCB diagram is printed on the copper clad laminate by hot pressing, and the heat transfer paper is gradually torn off, as shown below

5.Pour the corrosive liquid into the plastic box, and then put the corrosive liquid into the copper clad laminate printed with PCB pattern in step 4, after a period of corrosion (according to the length of time of different concentrations of corrosive liquid), about half an hour to about an hour, pour out the corrosive liquid, and take out the corroded copper clad lamina.

Use sandpaper to gently polish the toner on the PCB diagram on the copper clad laminate to get a copper circuit trace that is exactly the same as the PCB pattern, as shown below.

6.Put the copper clad laminate obtained in step 5 into the drilling machine and punch holes one by one according to all the hole positions of the PCB diagram, and finally the components can be soldered accordingly, and the whole PCB plate making process is over. As shown below: