摘要:
A flash-memory drive replaces a hard-disk drive using an integrated device electronics (IDE) interface. The flash drive has a printed-circuit board assembly (PCBA) with a circuit board with flash-memory chips and a controller chip. The controller chip includes an input/output interface circuit to an external computer over the IDE interface, and a processing unit to read blocks of data from the flash-memory chips. The PCBA is encased inside an upper case and a lower case, with an IDE connector that fits through and opening between the cases. The cases can be assembled with the PCBA by a snap-together, ultrasonic-press, screw-fastener, or thermal-bond adhesive method. Center lines formed on the inside of the cases fit between rows of flash-memory chips to improve case rigidity. The connector has two rows of pins that straddle the center line of the circuit board for a balanced design.
摘要:
A USB device in which all of the devices ICs are located on a lower surface of a PCB (i.e., opposite to the metal contacts) to minimize the device's thickness, and at least one of the ICs is positioned on a relatively narrow portion of the USB plug to minimize the device's length. A card-like carrier for protecting the USB device when not in use includes a frame-like base portion having peripheral walls surrounding a relatively wide main chamber, and an end portion that is attached to the base portion and includes end walls that define a relatively narrow slot communicating with the main chamber. The USB device plug structure is inserted through the main chamber into the slot until a front edge of the handle structure abuts the end walls, and then the device is rotated downward into the main chamber.
摘要:
A Universal-Serial-Bus (USB) device includes a PCBA mounted inside a plastic housing molded from a hard plastic (e.g., PVC), and includes a handle portion mounted or molded over a body section of the PCBA, and a plug portion mounted or molded over a plug section of the PCBA. The plug portion of the housing is integrally connected to (i.e., molded at the same time as) the handle portion, and includes a plug substrate extending under the plug section of the PCBA and a plug shell that extends over the plug portion, forming a structural arrangement similar to a conventional male USB connector plug that allows access to metal contacts formed on the PCBA, but without having the plug shell soldered to the PCBA.
摘要:
A memory module assembly includes two-plate heat sink attached to one or more of the integrated circuits (e.g., memory devices) of a memory module PCBA by adhesive. The adhesive is either heat-activated or heat-cured. The adhesive is applied to either the memory devices or the heat-sink plates, and then compressed between the heat-sink plates and memory module using a fixture. The fixture is then passed through an oven to activate/cure the adhesive. The two heat sink plates are connected together to form a rigid frame.
摘要:
A USB device in which all of the devices ICs are located on a lower surface of a PCB (i.e., opposite to the metal contacts) to minimize the device's thickness, and at least one of the ICs is positioned on a relatively narrow portion of the USB plug to minimize the device's length. A card-like carrier for protecting the USB device when not in use includes a frame-like base portion having peripheral walls surrounding a relatively wide main chamber, and an end portion that is attached to the base portion and includes end walls that define a relatively narrow slot communicating with the main chamber. The USB device plug structure is inserted through the main chamber into the slot until a front edge of the handle structure abuts the end walls, and then the device is rotated downward into the main chamber.
摘要:
A slim USB memory card is provided with retractable protection shield. A printed circuit board has a surface formed thereon a plurality of metal contacts. A main frame piece has two frame edges parallel with and opposite to each other for housing the printed circuit board. Each frame edge has an inner edge defined therein a track. A protection shield piece has two lateral sides. Each lateral side has a sliding bar, wherein the sliding bars sit on the tracks at the inner edges of the main frame piece, so as to glide back and forth on the tracks to perform cover and retract movement to protect the metal contacts.
摘要:
A metal-wrapped flash-memory-drive device has an integrated slim Universal-Serial-Bus (USB) connector that fits into a standard USB socket. The slim USB connector has 4 metal contacts on a circuit board that is encapsulated by a plastic case. Components are mounted onto the circuit board. A metal wrap conforms to the general shape of a plastic sub-assembly of the plastic case and a plastic cover that enclose the circuit board. The metal wrap can be bent around the plastic sub-assembly in a forming process, or can be pre-formed into a metal tube that the plastic sub-assembly is inserted into. Alignment holes in the metal wrap can fit over plastic stubs on the plastic sub-assembly, or friction can hold the metal wrap to the plastic sub-assembly. The plastic cover and case can be bonded together by molding, ultrasonically, with adhesive films, or using snaps to form the plastic sub-assembly.
摘要:
A low-profile Universal-Serial-Bus (USB) device includes a PCBA in which all passive components and unpackaged IC chips are attached to a single side of a PCB opposite to the metal contacts. The IC chips include, for example, a USB controller chip and a flash memory chip, or a single-chip (combined USB controller/flash memory) chip. Multiple flash IC chips are optionally stacked to increase storage capacity. The IC chip(s) are attached to the PCB by wire bonding or other chip-on-board (COB) technique. The passive components are attached by conventional surface mount technology (SMT) techniques. A molded housing is then formed over the IC chips and passive components such that the device has a uniform thickness. The low-profile USB device is optionally used as a modular insert that is mounted onto a metal case to provide a USB assembly having a plug shell similar to a standard USB male connector.
摘要:
A Universal-Serial-Bus (USB) device includes a PCBA mounted inside a plastic housing, which in turn is inserted and secured inside an outer case. The case is made of metal, and includes a handle portion that is integrally connected to a plug shell. The plug shell extends over a plug portion of the PCBA, which is mounted on a corresponding substrate portion of the housing, forming a structural arrangement similar to a conventional male USB connector plug, but without having the plug shell soldered to the PCBA. The case is, for example, sheet metal that is folded into a frame-like box for receiving the housing. The handle portion engages a cover portion of the housing such that plastic tabs are received in slots formed in the casing walls.
摘要:
A case-grounded flash-memory drive has a printed-circuit board assembly (PCBA) with flash-memory chips and a controller chip. The PCBA is encased inside an upper case and a lower case, with a Serial AT-Attachment (SATA) connector that fits through an opening between the cases. The cases can be assembled with the PCBA by a screw-together or thermal-bond adhesive method. Triple-axis case-grounding tabs draw any electro-static-discharges (ESD) current off the upper case along a primary axis and onto a PCBA ground through a secondary axis that is screwed into the PCBA. An intermediary axis between the primary and secondary axes fits around a PCBA notch while the secondary axis passes through a metalized alignment hole on the PCBA for grounding. When the SATA connector is inserted into a host, the host ground sinks ESD currents collected by the triple-axis case-grounding tabs.