Abstract: The semiconductor device (11) of the invention comprises a circuit covered by a passivation structure (50). It is provided with a first and a second security element (12A, 12B) which comprise local areas of the passivation structure (50), and with a first and a second electrode (14,15). The security elements (12A, 12B) have a first and a second impedance, respectively, which impedances differ. This is realized in that the passivation structure has an effective dielectric constant that varies laterally over the circuit. Actual values of the impedances are measured by measuring means and transferred to an access device by transferring means. The access device comprises or has access to a central database device for storing the impedances. The access device furthermore may compare the actual values with the stored values of the impedances in order to check the authenticity or the identity of the semiconductor device.

Abstract: The invention relates to an apparatus for supplying electronic components to a pick-up position, for example for automatically picking up and mounting said components on a printed circuit board by means of a mounting device, at least two supply carriers (8a,8b) being movable towards said pickup-position (7) by transport means, which carriers are each provided with recessed portions (9a,9b) containing respective electronic components, while said recessed portions are shielded off by means of a covering (10a,10b) which is removable during use. The invention aims to provide a tape-feeder of this kind with multiple tape supplies, wherein the mounting device can handle more electronic components whilst maintaining the width of the apparatus.