55results about How to "Remove reach" patented technology

The invention provides a chemical mechanical lapping method which comprises the following steps of: providing a semiconductor substrate formed with a dielectric layer; carrying out a first time of lapping to the dielectric layer, wherein organism residue is generated on the surface of the dielectric layer after the first time of lapping; carrying out a second time of lapping to the dielectric layer by adopting an alkaline reagent to remove the organism residue on the surface of the dielectric layer. According to the invention, the alkaline reagent is adopted to remove the organism residue on the surface of the dielectric layer after main lapping process is completed to a wafer and before cleaning of the wafer by adopting the subsequent process in the existing chemical mechanical lapping process; and compared with the prior art, the chemical mechanical lapping method provided by the invention has the advantages that the effect for removing the organism residue is more obvious, thereby improving the quality and performance of final products.

The invention relates to a heavy metal sewage treatment agent which is prepared from dodecyl diethylene triamine, dimethyl diallyl ammonium chloride, acrylamide, dibenzoyl peroxide, powdered activated carbon, ethylene diamine tetraacetic acid, tert-butylamine, carbamate, dithiocar-bamate, thiocarbamic acid ester, starch, cellulose, water soluble starch xanthate ester, sodium silicate, potassium peroxodisulfate, sodium hydrosulfite, strong base and water. The heavy metal sewage treatment agent disclosed by the invention is formed by being modified with a high-molecular compound; the mixture contains a plurality of active groups which can be complexed, chelated, absorbed and exchanged with heavy metal, so that heavy metal ions in the aqueous solution can be removed; the heavy metal sewage treatment agent has good removal effect on heavy metal ions, the removal rate is above 97%, and furthermore, the heavy metal sewage treatment agent has stronger Ca2+ and Mg2+ resistant capability; the removal rate of cadmium-containing sewage is 99.8%, which meets the national emission standard; and the removal rate of chromium-containing sewage is above 99.6%.

The invention discloses a novel high-speed high-strength paper tube adhesive and a preparation method thereof. First, water is added into a reaction kettle, kaolin and polyvinyl alcohol are added in a stirring state, and then a dispersant is added, the stirring is continued to raise the temperature, and a mixed solution is obtained by heat preservation; Add hydrochloric acid to adjust the pH value, then add formaldehyde to react, observe the reaction situation until the glue separation phenomenon occurs, immediately add ammonia water to adjust the pH value, then add the cornstarch that has been stirred and dissolved in advance, and turn on the cooling water to cool down after keeping warm to obtain polyvinyl formal glue Add the pre-dissolved boric acid + borax aqueous solution dropwise to the reaction kettle, add water to adjust the solid content after the dropwise addition, continue to cool down, then add dilute hydrochloric acid to adjust the pH value, and finally add defoamer, antiseptic and bactericide and cool to obtain a new high-speed High-strength paper tube glue; the paper tube glue prepared by this method can greatly improve the production efficiency of the tube coiler, improve product quality, reduce the "tube holding" phenomenon that occurs during paper tube production, and completely remove the residual formaldehyde in the glue.

The invention relates to a processing equipment, in particular to a post-processing equipment of a composite dung leakage board. The technical problem to be solved by the present invention is how to design a post-processing equipment for a composite dung board that can remove all excess material on a dung board at one time, save manpower during operation, and improve work efficiency. The present invention provides such a post-processing equipment for a composite dung leaking board, which includes: a base, a placement board connected to the top, a mounting board connected to the top of the placement board, and a connecting frame connected to the mounting board; guide rods, which are two For setting, two guide rods are slidingly connected on both sides of the connecting frame respectively, a stamping plate is connected between the bottoms of the guide rods on both sides, a return spring is connected between the guide rod and the connecting frame, and the return spring is sleeved on the guide rod. The present invention removes excess material on the dung leaking plate through the cooperative operation of the stamping plate and the driving assembly, thereby achieving the effect of removing excess material on the dropping manure plate.

The invention discloses an ecological restoration device and method for an urban black-odor riverway. The device comprises multi-stage overflow dams arranged at different water level differences of a black-odor river. A plurality of biological floating beds are arranged inside each overflow dam. A nanometer microhole aeration disc is arranged at the bottom of each biological floating bed. Floating plants are arranged inside the biological floating beds. A secondary combined subsurface wetland is arranged at the downstream part of the tail-stage overflow dam and comprises an aeration vertical flow wetland, a bending-flow type horizontal flow wetland and a water pump. Water inside the tail-stage overflow dam is lifted by the water pump and then enters the aeration vertical flow wetland, outflow water of the aeration vertical flow wetland flows into the bending-flow type horizontal flow wetland, and outflow water passing through the bending-flow type horizontal flow wetland flows back to the riverway. The device is simple in structure, low in energy consumption, and capable of efficiently removing nitrogen, phosphorus, sulphur, organic matters, heavy metal and other pollutants in the urban black-odor riverway at the same time.