7 results about "Channel geometry" patented technology

Embodiments herein provide for fluidic cooling assemblies embedded within a device package and related manufacturing methods. In one embodiment, the integrated cooling assembly includes a semiconductor device and a cold plate attached to the semiconductor device. The cold plate has a perimeter sidewall, a top portion and pairs of opposing cavity sidewalls. The perimeter sidewall extends downwardly from the top portion to a backside of the semiconductor device to define a perimeter of the cold plate. Each pair of opposing cavity sidewalls extends downwardly from the top portion towards the backside of the semiconductor device to define a coolant chamber volume therebetween. A distance between each pair of opposing cavity sidewalls in a direction parallel with the backside of the semiconductor device defines a width of a corresponding coolant chamber volume and a spacing between adjacent coolant chamber volumes, wherein the ratio of width to spacing is about 1:1.

This invention discloses an automatic sealing system and method for circuit boards, relating to the field of printed circuit technology. The method includes: acquiring a set of device height points, extracting a centerline coordinate set, a width set, and a no-coating coordinate set; calculating the entry cutoff level based on the centerline coordinate set and the width set, calculating the drift candidate coordinate set based on the device height point set and the width set, and generating a restricted deposition partition table; generating a restricted deposition command based on the restricted deposition partition table, the entry cutoff level, and the drift candidate coordinate set; driving the nozzle along the entry barrier trajectory to form an entry barrier layer according to the restricted deposition command, forming a barrier band outside the no-coating coordinate set, and injecting deposition according to the injection and discharge sequence and the guiding airflow sequence, and suppressing the drift candidate coordinate set according to the recovery airflow sequence; and outputting sealing record data. This invention can cope with the switching of material transport mechanisms caused by narrow channel geometry, avoiding the limitations of traditional two-dimensional trajectory optimization.

The invention provides a micro-channel fluid simulation method and system, and the method comprises the steps: constructing a D2Q9 model through a lattice Boltzmann method according to a to-be-simulated micro-channel geometric structure, setting basic parameters of the D2Q9 model, and initializing distribution functions of a flow field, a temperature field and a phase field and a corresponding equilibrium state distribution function; respectively executing collision and propagation operations on distribution functions of a flow field, a temperature field and a phase field based on a single relaxation lattice Boltzmann method, and simulating movement among fluid particles, energy transmission and evolution of a two-phase interface; setting boundary conditions of the D2Q9 model, and calculating a macroscopic physical quantity representation simulation result of the fluid at each moment according to an evolution result of each distribution function after collision propagation; and when the D2Q9 model meets a preset simulation termination condition, outputting a D2Q9 model simulation result in a standard data format. According to the scheme, the accuracy of micro-channel internal flow simulation can be improved, and the simulation calculation efficiency is guaranteed.

The application provides a design method of a two-way flow channel pump station outlet flow channel based on Dean vortex theory and a two-way flow channel pump station outlet flow channel, and comprises the following steps: based on Dean vortex theory, defining the curvature ratio and width ratio of the two-way pump station in the geometric coordinate system respectively, and establishing a mathematical model of the outlet flow channel geometry about the curvature ratio and the width ratio; establishing a plane rectangular coordinate system in the outlet flow channel center line, obtaining the curvature ratio and the width ratio of the outlet flow channel center line; calculating the outlet flow channel center line curvature radius, and obtaining the outlet flow channel center line curvature radius range; calculating the change relationship of the outlet flow channel width with the horizontal axis coordinate; obtaining the function relationship of the curvature ratio and the width ratio about the outlet flow channel center line along the way respectively, and determining the outlet flow channel geometry based on the function relationship. The application optimizes the water flow characteristics in the flow channel by accurately controlling the curvature and width change of the flow channel center line, thereby reducing the energy loss and improving the operation efficiency of the pump station.

The invention relates to a micro-fluidic chip for heterogeneous cell electrofusion, which is characterized in that a partition wall and two micro-channels are arranged in the chip, the two micro-channels are bilaterally symmetrical by taking the partition wall as a symmetry axis, and each micro-channel is provided with a main channel and a bypass channel; a plurality of capturing cavities are formed in the main channel; the bypass channel is shunted from the main channel at the inlet of each capturing cavity, extends towards the direction far away from the main channel and then turns back in a detour manner, and the bypass channel and the main channel are converged at the outlet of the capturing cavity; a fluid resistance difference exists between the main channel and the bypass channel, so that a cell suspension preferentially enters the capturing cavity of the main channel to capture a single cell when entering; the capturing cavities which are symmetrical left and right are communicated through a pairing channel, so that the two captured cells are in close contact and are fused under the action of a pulse signal to form a binuclear heterogeneous cell. Through special flow channel geometric design and fluid resistance matching, efficient and accurate pairing and electric fusion of heterogeneous cells are realized, and the method has the advantages of high flux, good fusion rate, less non-specific fusion and the like.

This invention belongs to the field of integrated sensing technology for millimeter-wave communication, specifically relating to a sensing-assisted adaptive tracking method for millimeter-wave channels. The method includes: constructing a time-division duplex frame structure, divided into sensing time slots and communication time slots; in the downlink phase of each sensing time slot: updating the environmental scatterer set information through a multi-target tracking algorithm to construct the channel geometry, including determining multiple non-line-of-sight propagation paths and the path parameters of each path; constructing the geometry of each path based on its path parameters; in the uplink phase: acquiring the prior geometry of each path and the statistical prior of the complex gain of the current sensing time slot to obtain the updated complex gain of that path; in the uplink phase of each communication time slot: acquiring the prior geometry of each valid existing path and the statistical prior of the complex gain of the current communication time slot to obtain the updated complex gain of that path. This invention achieves adaptive channel tracking for dynamic scenarios with path creation and disappearance.

A compact and small size multichannel collimator for neutrons with energies up to 50 keV is provided. The collimator has a multichannel structure composed of collimating channels (in air, vacuum or in the non-interacting atmosphere of Helium-4) alternating with “full” channels made with absorbent materials for slow neutrons. The geometry of the individual collimating and absorbing channels can be arbitrary. The geometry with channels of square section, such as to create a perfect checkerboard, is preferred from the point of view of ease of construction.