The general terminal is in contact with the terminal of the copper with its matching terminal. However, when the PITCH of the connector is reduced (eg PITCH = 1.0 mm or 0.5 mm), the terminal may have to be in contact with its cut surface surface.
At this time, the percentage of the shear surface relative to the copper and the roughness of the shear plane are most likely to be required to reach a high standard (eg 80% of the shear plane). Faced with such a cut surface problems, stamping in the mold design to use those methods, consider what conditions to overcome it? In this case we have to take the shear section, the process is as follows:
(A) for the early embryo cutting section, the local area reserved for (0.10mm, 0.06mm, 0.04mm) material width.
(B) and then make the finishing section.
To be observed:
(1) the effect of the size of the material of the initial embryo cutting material on the percentage of the cut after finishing.
(2) the effect of the shearing gap on the following two characteristics: - the integrity of the underfund. - Percentage of shear plane in board thickness.
(3) will refine the local area of the patch for polishing, to improve the impact of the terminal surface roughness.