How does a new board know the etching speed and pressure value?

If you don't know their pressure value, or the speed of the make-up class, when you buy it directly, ask their staff sometimes.

Changes in temperature and pressure of the etching solution (see Fig. 1) The change in the copper concentration in the etching solution on the etching speed (see Fig. 2) indicates that with the decrease of ferric chloride, the precipitation of Fe(Oh)3 and the formation of a film of Cu2Cl2 lead to a slower etching rate.

Hydrochloric acid can be added to avoid the hydrolysis of ferric chloride and weaken the corrosion production.

A new circuit board, and then if you want to know its speed and pressure at the moment, this should be tested first, and then we can know its real-time speed in the process of testing, and match the pressure value.

After a while, how to know the speed and pressure value of the resumption of classes? His speed and his pressure can be found based on the data displayed on the charge.

A new circuit board, how to know the occupant's quick freezing and pressure value? Let's look at his manual, how does the circuit board know the speed of the note? We have to check the information of the whole network and the network information to know what the pressure value is.

You have to use a special instrument to measure some of this, uh, the value and the pressure value, you can buy it on ** to take a look.

The velocity should be proportional to the pressure value, so the quality of the board can be calculated based on this.

How about a new circuit board, if you know the speed and pressure value at the moment, this is only available when they are designing it when they are working. This can be found in the original drawings.

Generally, they have the corresponding production logo on it, and you can check it in the production logo.

How do you know the speed and pressure of a new circuit board? It may be that you need to go through some more direct data, and then use formulas to calculate some of the values you want.

How to know the speed and pressure value of the new circuit board at the moment after a while, this needs to be measured by a professional. If you don't understand, there is no way to explain clearly, you still have to find a technician around you to do this measurement for you.

Photolithography is often used in the process of a new circuit board to ensure a certain level of accuracy.

If his corrosive speed is the same as the pressure.

After a while, the new circuit board wants to know the corroded scale and pressure of the cross-examination, as if a special inspection part is required.

How does the new board know the velocity and pressure value at all times? This should be consulted by an expert, there may still be some professional questions, good luck.

A new circuit board, if we want to grab it is real-time speed and pressure value, I think it can still bring us all better convenience and practicality.

A new circuit board is still very easy to know if you want to know the way to find a lot of ways to find it.

If you want to set it up, I think you can follow one of your ideas and do a processing without any problem.

In general, it would be difficult to get a pressure value for a circuit board.

How to know the speed and pressure of a new circuit board, I think it can only be tested by his professional equipment, so that you can get an accurate conclusion, and his conclusion is also very accurate, so the first thing you need to find is a professional testing equipment.

The vest circuit board can know the speed and pressure values that meet them.

The performance of the potion equipment is to spray the water pressure area copper thickness.

According to your filial piety.

is a network test point.

Or a bed-of-needle test point.

There are differences between the two.

The network test point is the point that will be settled after the data run to the network before the flying probe test.

The bed-of-needle test point is the point on the test rack.

The test rack has as many needles as there are under the scuffle.

This should be made according to the customer's standard, and the slice observation should be done frequently, the line thickness divided by the amount of side erosion is the time coefficient, and according to the side erosion selection, acidic, alkaline or adjust the time equipment.

In the etching process, the parts or parts that have been made of the first anti-corrosion layer are placed in the corrosion solution for etching, and etched until the metal thickness reaches the required level or the depth reaches the requirements. There are three variables throughout the etching process, namely: etch depth, etch speed, and etch time.

The relationship between these three is as follows: v=h t formula: v is the etching speed (mm min), and the chemical etching speed referred to here refers to the etching speed of one side; h is etched Shenzhen (mm); t is the etching time (min).

This formula is the basic formula for calculating etching depth and etching speed. For the chemical etching process of integral etching or molding, and the etching of hollowing**, both sides are often carried out at the same time. The speed of this double-sided etching process is 1 times faster than the speed of etching processing carried out on only one side, and there are many factors that affect the etching processing speed in the case of a certain metal material, the most important of which is the type, concentration and etching temperature of the etching agent.

If the concentration of etching agent and the etching conditions are constant, the characteristics of the material and the state of heat treatment also have a great influence on the speed of etching.

First of all, according to whether there is a rectifier circuit made of diodes or rectifier bridges on the circuit board, to determine whether to use DC or AC, and according to the voltage regulator circuit of the rear pole, such as 7805 7905 or 7812 7912 and other voltage regulator circuits to determine the voltage, generally if the above components are used, the general input voltage DC ratio voltage regulator circuit nominal value (7805 means 5V, 7812 means 12V) plus about 3V should be able to work, in addition, if there is no these, It depends on the electronic components used, mainly integrated circuits, if the digital circuit is generally used 5V, if the analog circuit depends on the chip model, the voltage is not easy to say, to judge the voltage is positive or negative, directly look at the polarity of the filter electrolytic capacitor of the power supply

The easiest way to do this is to look at the nominal withstand voltage value on the electrolytic capacitor near the power input on the board! Generally speaking, the withstand voltage value of the electrolytic capacitor is 2 times the root number of the input voltage, that is, the multiple, for example, the withstand voltage of the capacitor is 35V, and the input voltage should not exceed 24V, and so on.

Yes, measuring current is this method, if it is measuring DC, just distinguish the positive and negative poles, and connect the red table pen to the positive pole to avoid damaging the multimeter

You can connect a multimeter in series to measure the current on one of the wires. This is no problem, pay attention to the positive and negative pole connection, and the current should not be too large, to prevent the multimeter from burning out, be sure to use the maximum range of current first.

Analyzing a Circuit Board Method:

First of all, you need to understand what this motherboard is for. What are the main features? There are several unit circuits. What is the relationship between the individual unit circuits?

For example, in an integrated circuit, you have to figure out what the pins do and what conditions are needed for the chip to work properly.

To know the name and function of each device, especially the pins and functions of each chip in the digital circuit, you can also use reverse thinking to analyze