The effect of the production of thin film capacitor on parameters.

What is the effect of thin film capacitance on parameter variables, including these four factors, namely, electric capacity, loss Angle tangent value, insulation resistance and voltage resistance. The production process of thin film capacitors is also firmly centered around ensuring that these four parameters meet the requirements. Production process the deviation of process elements winding capacitance type film capacitor of capacitance C = 0.177 epsilon s/d epsilon for medium plate for the permittivity of s the effective area of d is the thickness of the dielectric capacitance is proportional to the epsilon, s, is inversely proportional to the d.

In the production process, these parameters will change, resulting in capacity error. The core of the process is to reduce these errors and increase the capacity hit ratio. Winding process: the width, thickness or margin of the coating itself have deviation. The variation of membrane tension from large circle to small circle, the error of tension of each winding machine. Roll pressure is too small. Deviation in the winding process, error in the wrong side.

When air humidity is large, the core capacity is large. Hot pressing process: the thickness error of the core is not uniform, resulting in the dispersion of the core, the uneven heat pressure plate and the temperature error. Immersion in heat treatment time or temperature error: error of vacuum degree, time error, curing temperature.