Abstract: A position retention device includes a pivot member having a mounting axle, a cylindrical seat, a cylindrical housing and an annular member. A cylindrical seat is mounted co-axially on the mounting axle of the pivot member, and has pluralities of circumferentially formed and alternately disposed north and south pole sectors. A cylindrical housing is mounted co-axially and rotatably on the mounting axle of the pivot member. An annular member is disposed within the annular receiving chamber in the cylindrical housing for simultaneous rotation with the cylindrical housing. The annular member has pluralities of circumferentially formed and alternately disposed north and south pole sectors. Position of the cylindrical housing is retained stationarily with respect to the cylindrical seat by virtue of attraction between adjacent two of the north or south pole sectors of the cylindrical seat and the annular member.

Abstract: The present invention is a driving circuit applied to a piezoelectric activation element, which comprises: a driving period generation unit and a switch circuit unit.

Abstract: An electrical connector assembly includes an electrical connector, a pick up cap (13) and at least one aligning key (14). The electrical connector has a base surrounded by spaced rigid walls (112) so as to form a receiving cavity (111) adapted to receive an IC package. The at least one aligning key is attached to the base, and has at least a part thereof configured to laterally invade the receiving cavity. The pick up cap is assembled onto the electrical connector, and has a receptacle (1321) defined thereon for receiving the at least one aligning key. Since the pick up cap forms the receptacle adapted for receiving the aligning keys, the pick up cap can be assembled onto the electrical connector, and securely held in position by the engagement of the receptacle of the pick up cap and the aligning key of the electrical connector.

Abstract: An electrical connector (1) adapted for electrically connecting an electronic package includes a housing (2), a cover (3) and a locking mechanism. The housing has a bottom wall (21), a number of rising walls (22-24) and a receiving space (27) defined therebetween. The cover is attached to a top portion of the housing and has a pair of downwardly extending side walls (32). The locking mechanism includes a locking groove (220) defined on the rising wall of the housing, and a locking post (35) formed on a corresponding side wall of the cover and slidable in the locking groove between a locked position and a released position.

Abstract: The invention provides a wireless transmission device, including a first circuit board, a second circuit board and a third circuit board. The first circuit board at least disposes more than one electronic elements. The second circuit board has an antenna, and the antenna is electrically connected to the first circuit board. The second circuit board is arranged at a predetermined angle to the first circuit board to enhance the receiving ability. The third circuit board is connected to the first circuit board and disposes a USB connector electrically connected to the first circuit board so that the change in form of the device can be easily made.

Abstract: An electrical connector (1) is adapted for electrically connecting an electronic package (3) to a circuit board (4). The electrical connector includes a housing (5) having a number of contacts retained therein, a number of hook portions (24) rising from the housing and resisting against an upper surface of the electronic package for fastening the electronic package to the housing.

Abstract: A lithography method includes the steps of preparing a substrate and a mold, wherein the mold having a plurality of nanometer-scale features each having a predetermined depth; disposing a liquid imprint layer on the substrate; pressing the mold on the substrate to enable the imprint layer to become a base material between the mold and the substrate and to enter the nanometer-scale features for a predetermined depth, wherein a plurality of nano-convexities are formed on the base material and the air in each of the features is compressed; solidifying the imprint layer to convert it from liquid into solid; and releasing the mold by pulling the mold upward away from the substrate, wherein counterforce is generated by the compressed air in the features to facilitate disengagement of the nano-convexities from the features successfully and finally the base material and the nano convexities jointly become the adherent microstructure.

Abstract: The invention provides a wireless transmission device, including a first circuit board, a second circuit board and a third circuit board. The first circuit board at least disposes more than one electronic elements. The second circuit board has an antenna, and the antenna is electrically connected to the first circuit board. The second circuit board is arranged at a predetermined angle to the first circuit board to enhance the receiving ability. The third circuit board is connected to the first circuit board and disposes a USB connector electrically connected to the first circuit board so that the change in form of the device can be easily made.

Abstract: An electrical connector assembly (5) includes an electrical connector (6) and a pick up cap (7) latchably assembly to the electrical connector. The electrical connector includes an insulative housing (60) and a number of conductive contacts received in the insulative housing. The pick up cap includes a main portion (70) and at least a pair of hooks (71) extending from the main portion toward the electrical connector to latch with the electrical connector. The pick up cap forms at least a pair of protecting members (72) adjacent to corresponding hook to protect the hook from being broken by improper force.

Abstract: A beauty/medication patch including a substrate, an outer layer, and a medication lotion; the outer layer being made of a degradable material being disposed on the substrate; one or a plurality of micro-probe array being disposed on a surface of the outer layer; the medication lotion being coated between the substrate and the outer layer, and/or admixed in the substrate; the patch being attached to a human skin, the micro-probe array piercing through a stratum corneum layer of the human skin and naturally being degraded by human skin or absorbed and metabolized by a human body; and the medication lotion penetrating into the skin and being absorbed by the human skin.

Abstract: A photocatalyst composite and fabrication method thereof. The photocatalyst composite of invention comprises a photocatalyst and iron catalyst, wherein the photocatalyst is carried on the surface of the iron catalyst and the ratio of the photocatalyst to the iron catalyst is about 3:100 to 15:100. The photocatalyst composite can be used for water treatment, air treatment and soil remediation.

Abstract: An electronic device having a keyboard fixed through a set of suckers and most suitably applied to the host body of an electronic product is provided. The electronic device includes a casing, a keyboard module and at least a sucker. The keyboard module has at least a key and the sucker is used for attaching the keyboard module to the casing. Furthermore, the sucker includes a first coupling part and a second coupling part. The first coupling part is used for sucking up the keyboard module and the second coupling part is used for fixing the sucker to the casing so that the electronic device and the host body can be assembled together smoothly.

Abstract: An electrical connector assembly (5) includes an electrical connector (6) and a pick up cap (7) latchably assembly to the electrical connector. The electrical connector includes an insulative housing (60) and a number of conductive contacts received in the insulative housing. The pick up cap includes a main portion (70) and at least a pair of hooks (71) extending from the main portion toward the electrical connector to latch with the electrical connector. The pick up cap forms at least a pair of protecting members (72) adjacent to corresponding hook to protect the hook from being broken by improper force.

Abstract: A BGA socket (100) includes an insulative housing (20) defining a grid array of contact cavities (23) in a bottom face (22); a plurality of electrical contacts (30), each electrical contact having a solder ball at one end, said electrical contacts disposed in said grid array of contact cavities with said solder balls exposed out of the contact cavities from the bottom face; and an insulative standoff (40) mounted on the bottom face of the insulative housing, said insulative standoff defining a plurality of contact holes (41) extending through therein, said solder balls received in said contact holes.

Abstract: A fluid analytical device for separating and analyzing a fluid including a first component and a second component. The specific weight of the first component exceeds that of the second component. A rotating base includes a receiving chamber, a first separation well, a second separation well, a first connection channel, a second connection channel, and a vent channel. The receiving chamber receives the fluid. The first connection channel connects the receiving chamber to the first separation well. The second connection channel connects the first separation well to the second separation well. The vent channel is connected to the receiving chamber. The distance from the first separation well to the receiving chamber exceeds that from the second separation well to the receiving chamber. When the rotating base rotates, the first and second components of the fluid flow into the first and second separation wells by centrifugal force, respectively.

Abstract: A terminal (1) for an IC socket includes a mounting end (11) adapted to be mounted onto a substrate. The mounting end includes a bottom surface (110) and a side surface (113). A recess (111), on a first region of the bottom surface, is adapted for a body of reflowable, electrically conductive material to be fused thereon. A channel (112), on a second region of said bottom surface, extends from the side surface to the recess. The providence of the channel allows the vapored flux material to be laterally dissipated through the channel, thereby having no formation of one or more voids within the mass of reflowable, electrically conductive material, during the reflowable process.

Abstract: A semiconductor memory and address-decoding circuit and method for decoding address allow the semiconductor memory to operate under a decreased capacity by disabling or hiding a predetermined portion of the semiconductor memory. The semiconductor memory comprises a first address-inputting circuit configured to receive a first external address, a switching circuit configured to switch a predetermined portion of the first external address to form an internal address, at least one address-setting code configured to set at least one predetermined bit of the internal address, a decoder coupling to the switching circuit and the address-setting code, and a memory array coupling to the decoder, wherein the decoder is configured to select at least one memory unit of the memory array based on the internal address. The first address-inputting circuit, the switching circuit and the address-setting code can be considered as an address-decoding circuit.

Abstract: An electrical connector (1) includes a dielectric housing (11) defining some receiving holes (110), a plurality of terminals resided in the dielectric housing (11) and some locating posts (12) received in the receiving holes (110) of the dielectric housing (11). The side walls of the locating posts 12 define some dimples (1221) and the surfaces of the receiving holes 110 have some leading slots (1101) for leading the dimples (1221) and the surfaces of the leading slots (1101) define some blocking slots (1102) for blocking the dimples (1221). The locating posts (12) are embedded in the receiving holes (110) along the leading slots (1101), and the locating posts 12 are rotated till that the dimples (1221) are resided in the blocking slots (1102), thereby, the position of the locating posts (12) relative to the IC package is assured.

Abstract: An electrical connector assembly includes an electrical connector, a pick up cap (13) and at least one aligning key (14). The electrical connector has a base surrounded by spaced rigid walls (112) so as to form a receiving cavity (111) adapted to receive an IC package. The at least one aligning key is attached to the base, and has at least a part thereof configured to laterally invade the receiving cavity. The pick up cap is assembled onto the electrical connector, and has a receptacle (1321) defined thereon for receiving the at least one aligning key. Since the pick up cap forms the receptacle adapted for receiving the aligning keys, the pick up cap can be assembled onto the electrical connector, and securely held in position by the engagement of the receptacle of the pick up cap and the aligning key of the electrical connector.

Abstract: A computer mouse is provided. The computer mouse includes at least a scroll wheel, wherein the scroll wheel includes: a plurality of openings and a plurality of lenses embedded in the plurality of openings separately. Another computer mouse is also provided, including at least a scroll wheel including at least a transparent means, wherein the transparent means includes a plurality of transparent parts and the transparent parts are formed within the transparent means. The lenses and the transparent parts mentioned above are utilized for the light for generating encoding signals of the scroll wheel to pass through.