Abstract: A method of manufacturing a chip assembly comprises joining an in-process unit to a printed circuit board; reflowing a bonding material disposed between and electrically connecting the in-process unit with the printed circuit board, the bonding material having a first reflow temperature; and then joining a heat distribution device to the plurality of semiconductor chips using a thermal interface material (“TIM”) having a second reflow temperature that is lower than the first reflow temperature. The in-process unit further comprises a substrate having an active surface, a passive surface, and contacts exposed at the active surface; an interposer electrically connected to the substrate; a plurality of semiconductor chips overlying the substrate and electrically connected to the substrate through the interposer, and a stiffener overlying the substrate and having an aperture extending therethrough, the plurality of semiconductor chips being positioned within the aperture.

Abstract: A method of manufacturing a chip assembly comprises joining an in-process unit to a printed circuit board; reflowing a bonding material disposed between and electrically connecting the in-process unit with the printed circuit board, the bonding material having a first reflow temperature; and then joining a heat distribution device to the plurality of semiconductor chips using a thermal interface material (“TIM”) having a second reflow temperature that is lower than the first reflow temperature. The in-process unit further comprises a substrate having an active surface, a passive surface, and contacts exposed at the active surface; an interposer electrically connected to the substrate; a plurality of semiconductor chips overlying the substrate and electrically connected to the substrate through the interposer, and a stiffener overlying the substrate and having an aperture extending therethrough, the plurality of semiconductor chips being positioned within the aperture.

Abstract: A method of manufacturing a chip assembly comprises joining an in-process unit to a printed circuit board; reflowing a bonding material disposed between and electrically connecting the in-process unit with the printed circuit board, the bonding material having a first reflow temperature; and then joining a heat distribution device to the plurality of semiconductor chips using a thermal interface material (“TIM”) having a second reflow temperature that is lower than the first reflow temperature. The in-process unit further comprises a substrate having an active surface, a passive surface, and contacts exposed at the active surface; an interposer electrically connected to the substrate; a plurality of semiconductor chips overlying the substrate and electrically connected to the substrate through the interposer, and a stiffener overlying the substrate and having an aperture extending therethrough, the plurality of semiconductor chips being positioned within the aperture.

Abstract: A rubber composition includes an ethylene-propylene-diene base terpolymer (EPDM) and exhibits advantageous aging properties in a high temperature environment. For example, it retains at least 30% of elongation at break and/or at least 70% tensile strength after heat aging at 350° F. for 504 hours; or it retains at least 50% of elongation at break and at least 70% tensile strength after heat aging at 392° F. for 70 hours. Such excellent heat aging performance has qualified HEATBOSS® EPDM for type E applications or basic F application per SAE J200 or ASTM D2000. The diene of the EPDM may be 5-vinylidene-2-norbornene (VNB), 5-methyl-ene-2-norbornene (MVNB), or another diene having a peroxide crosslinking efficiency (E) of at least 1.

Abstract: A light therapy device for treating a user's skin (such as wrinkles or acne). The device comprises a neckband for wearing on the user's neck and a light-emitting appliance comprising light diodes for delivering light therapy. Example formats for the light-emitting appliance include facemasks, eyemasks, and helmets. The device further comprises a power supply that may be contained within the neckband or carried by the neckband. An external electrical wire is for connecting the light-emitting appliance to the power supply. The neckband could have a variety of different configurations. Also disclosed are skin therapy kits and methods for light therapy to a user's skin.

Abstract: A method of manufacturing a chip assembly comprises joining an in-process unit to a printed circuit board; reflowing a bonding material disposed between and electrically connecting the in-process unit with the printed circuit board, the bonding material having a first reflow temperature; and then joining a heat distribution device to the plurality of semiconductor chips using a thermal interface material (“TIM”) having a second reflow temperature that is lower than the first reflow temperature. The in-process unit further comprises a substrate having an active surface, a passive surface, and contacts exposed at the active surface; an interposer electrically connected to the substrate; a plurality of semiconductor chips overlying the substrate and electrically connected to the substrate through the interposer, and a stiffener overlying the substrate and having an aperture extending therethrough, the plurality of semiconductor chips being positioned within the aperture.

Abstract: The present invention describes a water surface maintenance and cleaning system which comprises a home base station and a plurality of cleaning robot. The home station is either fixed on the water bank or floating on the water surface as an island. The home station serves as a charging station and trash collection station. The home base station is covered with solar PV panels and the PV panels convert the sunlight into electricity and then store the electricity into the batteries. The self-driving cleaning robot boat, which floats on water surface and drives around and sweeps the water surface. While sweeping across the water surface, the robot boat which is equipped with motor, rotors, pumps, nets, containers, etc. can intake water and filter out trashes and any other environmental unfriendly substances such as plastic bottles, cans, leaves, algae, plants, bio-films, and oil/grease.

Abstract: Tunnel magneto-resistive (TMR) sensors employing TMR devices with different magnetic field sensitivities for increased detection sensitivity are disclosed. For example, a TMR sensor may be used as a biosensor to detect the presence of biological materials. In aspects disclosed herein, free layers of at least two TMR devices in a TMR sensor are fabricated to exhibit different magnetic properties from each other (e.g., MR ratio, magnetic anisotropy, coercivity) so that each TMR device will exhibit a different change in resistance to a given magnetic stray field for increased magnetic field detection sensitivity. For example, the TMR devices may be fabricated to exhibit different magnetic properties such that one TMR device exhibits a greater change in resistance in the presence of a smaller magnetic stray field, and another TMR device exhibits a greater change in resistance in the presence of a larger magnetic stray field.

Abstract: Physically unclonable function (PUF) circuits employing multiple PUF memories to decouple a PUF challenge input from a PUF response output for enhanced security. The PUF circuit includes a PUF challenge memory and a PUF response memory. In response to a read operation, the PUF challenge memory uses a received PUF challenge input data word to address PUF challenge memory arrays therein to generate a plurality of intermediate PUF challenge output data words. The PUF response memory is configured to generate a second, final PUF response output data word in response to intermediate PUF challenge output data words. In this manner, it is more difficult to learn the challenge-response behavior of the PUF circuit, because the PUF challenge input data word does not directly address a memory array that stores memory states representing final logic values in the PUF response output data word.

Abstract: Multi-level cell (MLC) static random access memory (SRAM) (MLC SRAM) cells configured to perform multiplication operations are disclosed. In one aspect, an MLC SRAM cell includes SRAM bit cells, wherein data values stored in SRAM bit cells correspond to a multiple-bit value stored in the MLC SRAM cell that serves as first operand in multiplication operation. Voltage applied to read bit line is applied to each SRAM bit cell, wherein the voltage is an analog representation of a multiple-bit value that serves as a second operand in the multiplication operation. For each SRAM bit cell, if a particular binary data value is stored, a current correlating to the voltage of the read bit line is added to a current sum line. A magnitude of current on the current sum line is an analog representation of a multiple-bit product of the first operand multiplied by the second operand.

Abstract: Multi-level cell (MLC) static random access memory (SRAM) (MLC SRAM) cells configured to perform multiplication operations are disclosed. In one aspect, an MLC SRAM cell includes SRAM bit cells, wherein data values stored in SRAM bit cells correspond to a multiple-bit value stored in the MLC SRAM cell that serves as first operand in multiplication operation. Voltage applied to read bit line is applied to each SRAM bit cell, wherein the voltage is an analog representation of a multiple-bit value that serves as a second operand in the multiplication operation. For each SRAM bit cell, if a particular binary data value is stored, a current correlating to the voltage of the read bit line is added to a current sum line. A magnitude of current on the current sum line is an analog representation of a multiple-bit product of the first operand multiplied by the second operand.

Abstract: Tunnel magneto-resistive (TMR) sensors employing TMR devices with different magnetic field sensitivities for increased detection sensitivity are disclosed. For example, a TMR sensor may be used as a biosensor to detect the presence of biological materials. In aspects disclosed herein, free layers of at least two TMR devices in a TMR sensor are fabricated to exhibit different magnetic properties from each other (e.g., MR ratio, magnetic anisotropy, coercivity) so that each TMR device will exhibit a different change in resistance to a given magnetic stray field for increased magnetic field detection sensitivity. For example, the TMR devices may be fabricated to exhibit different magnetic properties such that one TMR device exhibits a greater change in resistance in the presence of a smaller magnetic stray field, and another TMR device exhibits a greater change in resistance in the presence of a larger magnetic stray field.

Abstract: An autonomous unmanned road vehicle and how it can be used to make deliveries. The unmanned vehicle is capable of operating autonomously on paved roadways. The vehicle has a control system for autonomous driving and a perception system for detecting objects in its surroundings. The vehicle also has one or more cargo compartments for carrying the delivery items. The vehicle may have a flashing light beacon to increase the conspicuousness of the vehicle. In consideration that the vehicle does not carry passengers, the size and/or motor power of the vehicle may be reduced as compared to conventional passenger vehicles.

Abstract: A combination cooling and heating fan structure includes an electronic device for controlling a driving device to drive a fan blade assembly to rotate within a first rotational speed range and thereby cause cold convection when the driving device is started alone. The electronic device includes a limiting module for limiting the driving device to rotate within a second rotational speed range, which is smaller than the first rotational speed range, when the driving device and a heating device are started at the same time. That is, when the driving device and the heating device are started simultaneously, the limiting module limits the driving device to rotate within the second rotational speed range for the fan blade assembly to blow hot air through an indoor environment and cause heat convection, which increases the temperature of the indoor environment while preventing quick loss of thermal energy during the heat convection.

Abstract: Features are disclosed relating to a case for a mobile device that provides supplemental battery power and supplemental storage space to the mobile device. Additional features are disclosed relating to an external storage device that can provide supplemental battery power and/or supplemental storage space for one or more devices. Further features are disclosed relating sharing and searching for files. Files may be shared across multiple (e.g., two or more) devices, operated by or associated with multiple users, providing multiple file storage locations. Files may be searched across the multiple devices using, e.g., search terms, tags, and/or other search options. Searching may also be performed with respect to activities performed in connection with subject files.

Abstract: The present disclosure provides a metal based dental article and a method of forming the metal based dental article. The metal based dental article includes a base layer, a first coating on the base layer and a second coating on the first coating. The base layer is formed from a metal substrate selected from the group consisting of a stainless steel, a titanium alloy or a nickel titanium alloy. The first coating is formed from a metal selected from the group consisting of nickel, a nickel alloy, copper, a copper alloy, zinc, a zinc alloy, tin, a tin alloy, gold or a gold alloy, where one of the first coating or the surface of the base layer has a surface roughness (Ra) from 0.1 to 1.0 microns as measured according to ASTM B46.1-2009. The second coating is formed from a metal selected from the group consisting of rhodium, a rhodium alloy, ruthenium, a ruthenium alloy, cobalt, a cobalt alloy, palladium, or a palladium alloy.

Abstract: An oscillating fan with built-in pull-type control switch includes a housing defining a receiving space having a front open end; a driving motor mounted to the front open end of the receiving space and having a first rotary shaft; a blade assembly mounted to the first rotary shaft; at least one pull switch having a selector mounted in the housing and an actuator extended through and located outside the housing; and a control box provided in the receiving space to electrically connect to the driving motor and every pull switch. The actuator includes a pull string having an end connected to the selector and another end hung from the housing by a predetermined length, allowing a user to control the oscillation of the fan via the pull string. Since most fan components are integrated in the housing, the fan occupies only reduced space and is more practical for use.