10results about How to "Small pitch" patented technology

The invention discloses a PCB (Printed Circuit Board) and a preparation method thereof. The PCB comprises an intermediate board, a first differential board, a first outer board, a second differential board and a second outer board, the first differential plate and the second differential plate are arranged on the two side faces of the middle plate respectively, the first outer plate is arranged on the side face, away from the middle plate, of the first differential plate, and the second outer plate is arranged on the side face, away from the middle plate, of the second differential plate. The first differential plate is provided with a first differential transmission line, and the second differential plate is provided with a second differential transmission line; the PCB further comprises open holes, and the open holes comprise round holes and arc-shaped holes; the first outer plate and the second outer plate are also sequentially provided with a copper layer and a nickel-gold layer; and the holes are filled with resin. A strong inductance structure is formed by the first differential transmission line, the second differential transmission line, the hole wall and the nickel-gold layer, the PCB can meet the choking effect under the condition that an external inductor is not needed, and meanwhile low cost and miniaturization can be achieved.

The utility model relates to a microscope tube, and belongs to the technical field of microscopes. The middle lens group and the optical assembly are installed in the cylinder body, the middle lens group comprises a primary objective lens, a middle objective lens, a driving shaft and a driving assembly driving the driving shaft to rotate, a first driving groove and a second driving groove are formed in the driving shaft, and the first driving groove and the second driving groove are arranged up and down respectively; the first driving groove and the second driving groove are spirally formed around the driving shaft and are opposite in spiral direction, the middle objective lens comprises a middle lens frame and two middle lens bodies, the middle lens frame is provided with a first driving column and is inserted into the first driving groove in a sliding mode, the two middle lens bodies are installed in the cylinder body in a sliding mode, and the two middle lens bodies change along with the sliding distance. The two middle lens bodies are installed on the middle lens frame in a sliding mode and slide along with the middle lens frame, and the primary objective lens is consistent with the middle objective lens in assembly mode and matched with the second driving groove. The utility model has the effect of accelerating the adjustment speed of the middle lens group without changing the screw pitch.

The invention relates to the technical field of smelting, in particular to high-impact-toughness low-temperature B-grade steel which comprises the following components in percentage by mass: 0.17%-0.23% of C, 0.3%-0.4% of Si, 1%-1.2% of Mn, less than or equal to 0.03% of S, less than or equal to 0.03% of p, 0.3%-0.4% of Cr, 0.25%-0.3% of Ni, less than or equal to 0.04% of Cu, 0.01%-0.04% of Ti and the balance of Fe and inseparable impurities. The invention further relates to a preparation process of the high-impact-toughness low-temperature B-grade steel. The prepared low-temperature B-grade steel can keep high impact toughness at the low temperature (minus 50 DEG C), wherein the impact toughness is almost unchanged compared with the impact toughness at the normal temperature.

This invention belongs to the field of aquatic aeration technology, and specifically relates to an aeration and stirring device, comprising: a shell, a first aeration pipe, a stirring assembly, and a deceleration assembly; the first aeration pipe, the stirring assembly, and the deceleration assembly are disposed inside the shell, with the first aeration pipe located at the bottom of the shell, aerating the material inside the shell; the stirring assembly agitates the bubbles released by the first aeration pipe; the rotation of the stirring assembly drives the first aeration pipe to rotate; and the deceleration assembly makes the rotation speed of the stirring assembly greater than that of the first aeration pipe. By rotating the first aeration pipe, materials at greater depths can be fully aerated, while the rotation of the stirring assembly ensures that materials at less depths are fully aerated, resulting in uniform aeration of materials at different depths and improving aeration efficiency; the deceleration assembly makes the rotation speed of the first aeration pipe less than that of the stirring assembly, which facilitates the stirring assembly to fully agitate the bubbles released by the first aeration pipe into materials at less depths, improving oxygen utilization and increasing aeration efficiency.

The utility model belongs to the field of sauce processing provides a kind of sauce three-dimensional heating cooking equipment, including cooking jar, the side wall of cooking jar is fixedly connected with feed pipe, the lower surface of cooking jar is fixedly connected with discharge pipe, the circumferential surface of cooking jar is fixedly installed with several evenly distributed heating fins, the two side walls of cooking jar are fixedly installed with support frame, the upper surface of support frame is fixedly installed with fixed column;The utility model can be heated by the side wall to sauce material by the several evenly distributed heating fins set in the circumferential surface of jar body, so that the heating in jar body is more uniform, while the stirring effect of equipment is improved by the variable pitch helical blade set, cooperate the use of stirring fin, while the sauce material adhered to the inner side wall of jar body can be stirred in the stirring process by the gear ring and scraper etc. set, reduce the problem that sauce material adheres in jar body and causes it to appear scorched, also can clean the inside of jar body after cooking.

The invention provides a rotating speed-pitch composite control method and system for controllable-pitch propeller propulsion, and the method comprises the steps: building a telegraph handle position-rotating speed-pitch multi-dimensional space curve through ship-engine-propeller propulsion characteristics, thereby achieving the functions of propeller composite control characteristic function expression and propeller state space online real-time visualization; a diesel engine rotating speed set value obtained by processing the engine telegraph handle position variable through a locomotive order signaling function is subjected to rotating speed limitation and navigational speed control algorithm links to generate a diesel engine rotating speed expected value, the diesel engine rotating speed expected value is input into the multi-dimensional space curve, and a shaft rotating speed set execution value and a screw pitch set execution value are generated; after coupled rotating speed control, screw pitch control, fuel oil limitation and screw pitch limitation, the rotating speed and the screw pitch are controlled within respective allowable ranges, stable operation is guaranteed, and large rotating speed fluctuation and overload of the diesel engine are avoided; and the propelling performance such as operation controllability, flexibility, safety and reliability of the propeller is achieved by adjusting the parameter setting value of the rotating speed-screw pitch combination characteristic curve on line.

The invention provides a manufacturing method of an OIS coil board. The manufacturing method comprises the following steps: blanking a substrate; performing laser through hole on the substrate to obtain a positioning hole on the substrate; the substrate is subjected to film pressing and exposure, the exposure position corresponds to the positioning hole, and a circuit layer is obtained on the substrate; the method comprises the following steps: carrying out DES, AOI, Desmear, PTH and SAP line pretreatment on a substrate so as to obtain a PTH hole in the substrate; performing film pressing, exposure and development on the substrate; electroplating the substrate for the first time so as to obtain a plurality of copper electroplating areas on the substrate; performing film removal and flash etching on the substrate, and performing AOI detection on the substrate to inspect defects on the substrate; and electroplating the substrate for the second time, and pressing the substrate: the second electroplating is used for increasing the copper thickness in the copper electroplating areas, and reducing the line distance between any copper electroplating area and the adjacent copper electroplating area.

A method for forming a semiconductor structure, comprising: providing a substrate including a target layer, on which a pattern definition layer is formed; forming an opening extending in a first direction and arranged in a second direction in the pattern definition layer; forming a first sidewall layer on the sidewall of the opening, comprising a first sub-sidewall layer and a second sub-sidewall layer arranged alternately; forming a first sacrificial layer in the remaining space of the opening; forming a second sacrificial layer on top of the first sub-sidewall layer or the second sub-sidewall layer, the second sacrificial layer covering a portion of the pattern definition layer and the first sacrificial layer in the second direction; forming a second sidewall layer on the sidewall of the second sacrificial layer; using the second sidewall layer as a mask, removing the second sacrificial layer and the first sacrificial layer and the pattern definition layer on both sides of the second sidewall layer; etching the target layer using the remaining first sacrificial layer and the pattern definition layer, and the first sidewall layer as a mask to form a target pattern. The present invention further reduces the pitch between target patterns while increasing the process window.

A universal produced liquid sediment radical treatment device relates to the technical field of petroleum equipment and comprises an upper connector, an outer working barrel, a liquid suction pipe, an eccentric single-flow filtrate pipe, a multifunctional spiral blade, a pure liquid isolation pipe and a lower connector, the multifunctional spiral blade is surrounded by the outer wall of the liquid suction pipe, and an arc-shaped hole is formed in the inner side of the multifunctional spiral blade. The upper portion of the eccentric single-flow filtrate pipe is provided with an open pipe wall, the lower portion of the eccentric single-flow filtrate pipe is closed, the lower end of the eccentric single-flow filtrate pipe is welded to the top end of the pure liquid isolation pipe, the whole formed by the eccentric single-flow filtrate pipe and the pure liquid isolation pipe is sleeved with the outer working barrel, and the top end of the outer working barrel is welded to the upper connector. The lower joint is welded at the bottom; a liquid inlet hole is formed in the outer working barrel. The universal produced liquid sediment radical treatment device not only can effectively separate liquid, gas, sand and dirt, but also can separate fine-particle muddy substances, the separation rate can reach 99% or above, and meanwhile, the separated substances can be automatically collected.

This invention discloses a ferroelectric liquid crystal composition comprising a first component and a second component. The first component contains one or more compounds of general formula I, and the second component contains one or more compounds of general formula II. The ferroelectric liquid crystal composition has the advantages of high transmittance, high contrast, large phase transition range, small pitch, and high spontaneous polarization intensity. This invention also provides a display device comprising the ferroelectric liquid crystal composition.