43results about How to "Slow down the speed of development" patented technology

A bumping process is disclosed. The bumping process comprises the steps of: providing a wafer having a plurality of bonding pads and a passivation layer, wherein the passivation layer exposes the bonding pads; forming an UBM layer over the wafer to cover the bonding pads; forming two or more photoresist layers over the wafer, wherein the photoresist layers have different exposure and development characteristics; forming at least one or more stair-shaped openings in the photoresist layers by a single exposure corresponding to the bonding pads; filling solder into the stair-shaped openings to form a plurality of solder bumps; removing the entire photoresist layer. The bumping process can provide bumps with higher heights, so that the connection between chips and carriers becomes more reliable.

The invention discloses a low-cost consumable molten iron desulphurization mixer and a preparation method thereof. The mixer comprises a mixing shaft, and a connecting flange arranged above the mixing shaft, wherein the mixing shaft consists of an internal gas cooling pipe and an external composite mixing shaft core from inside to outside; a plurality of mixing blades are arranged at the lower end of the mixing shaft; and refractory material working liners are applied on the outermost layers of the mixing shaft and the mixing blades. The method comprises the following steps: firstly, a mixing shaft frame and blade frames are prepared; V-shaped anchoring pieces are welded on the metal surfaces of the mixing shaft frame and the blade frames to prepare the composite mixing core; and thermal insulation buffer layers and refractory casting layers cover the metal surfaces of the mixing shaft frame and the blade frames in sequence to obtain the mixer. The comprehensive production cost of the mixer is largely reduced; the recycling value of the mixer after use is largely reduced; the long-distance transporting recovery of the mixer after use and the special recovering utilization of the mixing core are prevented; and the purposes of low cost and consumption of the mixer are achieved.

The invention relates to aluminum high-pressure electrical porcelain. The aluminum high-pressure electrical porcelain comprises a raw material and a glaze material, wherein the raw material comprises the following components by weight percent: 57 percent of bauxite with aluminum content being more than 86 percent, 11 percent of green grass clay with aluminum content being 20 percent and magnesium content being 10 percent, 10 percent of black clay with aluminum content being 25 percent, 6 percent of feldspar powder and 16 percent of sulfonated soil with aluminum content being 22 percent; and the glaze material comprises 5 percent of manganese dioxide, 8 percent of zirconium oxide, 3 percent of chromium oxide, 5 percent of sulfonated soil, 9 percent of Triratna, 15 percent of moisture gauge, 5 percent of sodium humate, 15 percent of quartz, 5 percent of calcite, 25 percent of black clay and 5 percent of kaolin. The production process comprises the steps of batching, ball milling, screening, mixing, press filtering, smelting, aging, staling, clay refining, drying in shade, fettling, drying, glazing, sintering, cutting, grinding and cementing. By adopting the aluminum high-pressure electrical porcelain and the production process thereof, the problems of the existing high-pressure electrical porcelain product that the mechanical strength is low and the breaking strength is low can be solved. The advantages of low cost, high mechanical strength and high breaking strength can be achieved. The process is simple and easy to operate and control.

The invention provides a method of preparing a Ni-Co nano compound multi-layered alloy. The method comprises the following steps of: S1, preparing a Ni-Co nano compound electrolyte; and S2, putting a plating article in the Ni-Co nano compound electrolyte, performing electrodeposition by means of a three current cyclic step change method, taking out the plating article after electrodeposition, washing the plating article thoroughly and naturally airing the plating article. According to the method of preparing the Ni-Co nano compound multi-layered alloy provided by the invention, the obtained plating layer is a multi-layered structure. Nanoparticles are uniformly dispersed, and the invention provides a novel method for electrodepositing preparation of the corrosion-resistant wear-resistant compound multi-layered alloy.

The invention discloses an intelligent movement control method for prolonging service life of a slewing bearing. The intelligent movement control method is characterized by comprising the following steps of: inputting an expected track theta r into an impedance controller (1); measuring interaction force Fe of the tail end of a slewing bearing mechanical structure and an environment through a force sensor (7); inputting a compensation signal of a frictional resisting moment compensator (4) into the impedance controller (1); inputting a reference track theta r(t), theta r(t-1) and theta r(t-2) into a neural network compensator (2); and leading a drive torque signal T obtained by the impedance controller (1) into a torque motor (5), and driving the slewing bearing mechanical structure (6) by the torque motor. According to the intelligent movement control method for prolonging the service life of the slewing bearing, disclosed by the invention, accurate force and position control of the slewing bearing mechanical structure is achieved, therefore, power loss is reduced, the occurrence probability and the development speed of damage are effectively reduced, and the service life is prolonged.