Abstract: A method of forming a semiconductor device includes: forming a first conductive feature in a first dielectric layer disposed over a substrate; forming a second dielectric layer over the first dielectric layer; etching the second dielectric layer using a patterned mask layer to form an opening in the second dielectric layer, where the opening exposes the first conductive feature; performing an ashing process to remove the patterned mask layer after the etching; wet cleaning the opening after the ashing process, where the wet cleaning enlarges a bottom portion of the opening; and filling the opening with a first electrically conductive material.

Abstract: A shortcircuiting and circuit-breaking alarm includes a Darlington amplifier comprised of two NPN transistors connected in series, a PNP transistor connected to the Darlington amplifier, a first planar or linear conductor connected between a base of a first NPN transistor of the Darlington amplifier and a positive pole of a power source, a second planar or linear conductor connected between the Darlington amplifier and the PNP transistor having an insulator interposed between the first conductor and the second conductor, the first NPN transistor having its base connected to the positive pole of the power source through a resistor of large resistance, and the PNP transistor having its base connected to a negative pole of a power source through a resistor of small resistance, whereby upon a cutting of either the first or the second conductor or a shortcircuiting of the two conductors, the PNP transistor will be conducted to conduct a silicon control rectifier, which is connected to a sounding integrated circuit

Abstract: An alarming wallet includes: an alarm switch having two contactors respectively formed on two leaves of the wallet whereby upon a withdrawal of the wallet from an owner's pocket, the two contactors of the alarm circuit will be closed by a pickpocket's fingers to sound the alarm for alerting a wallet owner and preventing the theft of his or her wallet.

Abstract: A missing reminder for pocket article includes: a wallet for storing credit card or the like, a gravitational actuator clamped on the wallet and an alarming circuit which is operatively sensed when withdrawing the wallet from an owner's pocket by seating a weight disk of the actuator on a receiver to close two contacts of the alarming circuit formed on the receiver to sound the alarm and give warning to the wallet owner.