【 Weak current College 】 PCB plating tank size calculation method 】

Bath size and average load capacity cathode current density, the volume of the current density, etc.;
Generally speaking, the size of the bath, refers to a electrolytic plating tank volume L, also known as the effective volume, i.e. bath cavity length X lumen
Width X depth of the electrolyte;

Generally the amount according to the electroplating process or existing DC plating equipment, and other criteria to calculate matching;

Selecting the right bath size on the production plan, estimating production capacity and ensure electroplating quality is of great significance;

Determine the size of the plating tank three considerations:

1. meet the requirements of the processing part dimensions;
2. prevent overheating electrolyte occurred;
3. to maintain the electroplating production cycle electrolyte composition certain stability;

Anode current density, according to the actual full immersion into the electrolyte to calculate area, because of the current efficiency of yin and Yang very different, but slightly worse
Don't;
DA = I always/S Yin (A/dm2)
DA = I always/S Yang (A/dm2)
Average load d: electroplating unit area parts need electrolyte volume
That is, d = V/S (L/dm2)
Volume current density DV:
Unit volume by current strength: DV = I always/V (A/L)

Electroplating processes important to appropriate control volume current density because current work through the electrolyte solution and when because of the heat-resistance, making
% Of electrolysis temperature and speed of electrolyte temperature and height and volume of the current density. In order to prevent the electrolyte rising too quickly,
You must have the more volume of electrolyte to reduce the volume of the current density;

As bright acid copper plating: appropriate volume current density 0.3-0.4A/L, that is, when the total current for 1000A, with 2500 —
3000L electrolyte;

Experience data:

The following data for a variety of common plating type of cathode current density and the average loading some empirical data relating to:
Plating type cathode current density range DK, A/dm2 average load d, L/dm2
Copper sulfate plating 1.0---3.07-9
Acidic Tin 1.0---3.07-9
Bright nickel 2.0---4.06---8
Ya NI 1.0---1.56---8