What is the minimum over-hole of pcb double panel
Different production enterprises for custom pcb double panel minimum over hole process capability are different, different positioning standards determine the custom production capacity, now the domestic market pcb double panel over hole in general minimum in 0.2mm or so, affect to pcb double panel over hole size design factors include: current size, circuit board alignment design, application areas and other major aspects, followed by pcb double panel minimum over hole and Circuit board board thickness also has an inseparable relationship;
Double-sided pcb minimum vias.
Custom pcb double-sided board the most common minimum aperture are: 24mil 20mil 16mil 12mil 8mil, board thickness: 0.4mm / 0.6mm / 0.8mm / 1.0mm / 1.6mm, etc., to calculate the aperture deviation no direct formula, by the same name of the axis of the basic deviation is converted, conversion needs to comply with the following two principles: 1. General rules (inverted relationship): the same version of the name with the right to fit the same nature of the fit. 2. base hole system of the fit (such as φ30H8/f8) into the same name of the base axis system of the fit (φ30F8/h8 ), the nature of the fit remains unchanged.Further design pcb double panel over the hole size needs to be determined according to the size of the component pins, normal capacitors and row of pins plug-in pin hole in about 1.0mm, hole tolerance of plus or minus 0.1mm, the calculation of the hole size is based on the plug pin size + positive tolerance + 0.1mm, the final calculation of the hole as well as the absolute matching value of the pin.