An input device includes an upper cover including a plurality of key openings and a keyboard including a base plate disposed on a back side of the upper cover, and a plurality of key tops provided in a front side of the base plate and inserted in the respective key openings. A plurality of hooks, each of which is disposed between the key tops adjacent to each other at a plurality of points and is provided upright on a back surface of the upper cover, fixes the keyboard to the upper cover.

A method of manufacturing keycaps, each keycap having a top and a skirt, includes: providing a first jig having a plurality of positioning units; arranging correspondingly a plurality of keycaps onto the plurality of positioning units; attaching a first film including an ink layer and a first release layer to the plurality of keycaps by using an out-mold transfer technique, such that the first film covers respective upper surfaces of the tops and respective side surfaces of the skirts of keycaps; removing the first release film; laser-engraving the ink layer; and forming a protection layer on the laser-engraved ink layer. A keycap manufactured by the method of the present invention is also disclosed.

A key structure comprises a substrate, a membrane circuit disposed on the substrate, a waterproof structure disposed on the membrane circuit, a keycap, a conduction switch and a scissors structure. The waterproof structure includes a waterproof plate and a waterproof wall with a through hole. The waterproof wall surrounds the through hole and extends opposite to the membrane circuit. An end of the conduction switch passes through the through hole to be disposed on the membrane circuit, and the other end of the conduction switch protrudes from the waterproof wall to be connected to the keycap. The scissors structure includes a first end portion and a second end portion. The first end portion is pivotally connected to the keycap, and the second end portion is pivotally connected to the waterproof wall for the keycap to move up and down relatively to the membrane circuit.

A thin-film switch includes an upper conducting layer, a lower conducting layer and an insulating layer, wherein the insulating layer is located between the upper conducting layer and the lower conducting layer, one of the upper conducting layer and the lower conducting layer includes a conducting circuit layer and an anode triggering portion and a cathode triggering portion that are arranged on the conducting circuit layer, the other layer includes a first base material and a conductor that is arranged on the first base material and is conducted with the anode triggering portion and the cathode triggering portion. Both the anode triggering portion and the cathode triggering portion are arranged on the upper conducting layer or the lower conducting layer at the same time, the corresponding lower conducting layer or upper conducting layer is provided with the conductor with a conducting function, the conductor contacts with both the anode triggering portion and the cathode triggering portion at the same time when pressing the thin-film switch, both the anode and the cathode are conducted, and the switch is on.

A thin-film switch includes, an upper conducting layer, a lower conducting layer and an insulating layer, wherein the insulating layer is located between the upper conducting layer and the lower conducting layer, one of the upper conducting layer and the lower conducting layer includes a conducting circuit layer and an anode triggering portion and a cathode triggering portion that are arranged on the conducting circuit layer, the other layer includes a first base material and a conductor that is arranged on the first base material and is conducted with the anode triggering portion and the cathode triggering portion. Both the anode triggering portion and the cathode triggering portion are arranged on the upper conducting layer or the lower conducting layer at the same time, the corresponding lower conducting layer or upper conducting layer is provided with the conductor with a conducting function, the conductor contacts with both the anode triggering portion and the cathode triggering portion at the same time when pressing the thin-film switch, both the anode and the cathode are conducted, and the switch is on.

A key structure comprises a substrate, a membrane circuit disposed on the substrate, a waterproof structure disposed on the membrane circuit, a keycap, a conduction switch and a scissors structure. The waterproof structure includes a waterproof plate and a waterproof wall with a through hole. The waterproof wall surrounds the through hole and extends opposite to the membrane circuit. An end of the conduction switch passes through the through hole to be disposed on the membrane circuit, and the other end of the conduction switch protrudes from the waterproof wall to be connected to the keycap. The scissors structure includes a first end portion and a second end portion. The first end portion is pivotally connected to the keycap, and the second end portion is pivotally connected to the waterproof wall for the keycap to move up and down relatively to the membrane circuit.

An input device includes an upper cover including a plurality of key openings and a keyboard including a base plate disposed on a back side of the upper cover, and a plurality of key tops provided in a front side of the base plate and inserted in the respective key openings. A plurality of hooks, each of which is disposed between the key tops adjacent to each other at a plurality of points and is provided upright on a back surface of the upper cover, fixes the keyboard to the upper cover.

An electrical fuse for an integrated circuit (IC). The electrical fuse includes a dielectric material substrate, and at least one line of conducting material located in the dielectric material substrate. Each of the at least one line of conducting material includes a first conductive structure, a second conductive structure, and a fuse element extending horizontally between the first and second conductive structures. The fuse element has a height that is less than the height of the first and second conductive structures.