33results about How to "Inhibition of thinning" patented technology

First and second sub-bumps are provided on both surfaces of each substrate along with a usual bump structure (first and second main bumps), and at least one of the first and second sub-bumps is made greater in height than the first and second main bumps, so that the sub-bumps come into contact with one another earlier than the main bumps at the time of joining semiconductor chips, thereby securing margins of joint among the main bumps and suppressing the thin-filming of a layer, such as a solder layer, to be fluidized by heating.

The present invention provides an etching liquid for copper or a copper alloy capable of producing an electronic substrate in which side etches are reduced, the narrowing of the upper part of copper wiring is suppressed, and short circuits are not generated, and to provide a method for producing an electronic substrate using the same. In the method for producing an electronic substrate, a copper layer (2a) formed on an electrically insulated base material (1) is etched so as to be a prescribed shape to form copper wiring (2c). After the main etching, copper (A) to be removed remaining in the cuff part of copper wiring (2b) is removed with an aqueous solution comprising (a) an oxidizer for copper by 1 to 50 g/L, (b) at least one kind of acid selected from the group consisting of hydrochloric acid by 1 to 400g/L and organic acid by 1 to 200 g/L, and (c) at least one kind of polymer selected from the group consisting of polyalkylene glycol and a copolymer of polyamine and polyalkylene glycol by 0.01 to 50 g/L.

PROBLEM TO BE SOLVED: To provide a cylinder injection internal combustion engine with excellent ignitability for improving combustion efficiency and improving fuel consumption without enlarging a cavity, by separating a tip firing part of an ignition plug from a jet flow of a fuel injection valve and bringing the tip firing part close to a center axis of the cavity. ŽSOLUTION: In the cylinder injection internal combustion engine, a combustion chamber 8 is formed between a piston 5 in which the cavity 51 is formed in a top surface thereof and a cylinder head 3, and a lower wall surface of the cylinder head 3 is a ceiling surface of the combustion chamber 8. A plurality of intake and exhaust valves, the fuel injection valve 60, an ignition plug 70 are disposed to face the combustion chamber 8. The ignition plug 70 is inserted from a side surface of the cylinder head 3 toward the combustion chamber 8, and the tip firing part 71 thereof is inclined with respect to the cylinder axis L1 and approximated to the center axis L1. The fuel injection valve 60 is inserted from an upper surface of the cylinder head 3 toward the combustion chamber 8 and inclined on a side approximately opposite to the ignition plug 70 with respect to the cylinder axis L1, and a tip nozzle 62a thereof is separated in an inclination direction from the center axis L1 of the cavity 51. Ž

The invention relates to an aclinal stirring friction welding method for an AZ31 magnesium alloy sheet and a stirring head; the method comprises the following steps of: firstly, mechanically polishinga butt jiont face to be welded of the AZ31 magnesium alloy, cleaning by acetone, absolute ethanol and deionized water successively, and then fixing the AZ31 magnesium alloy on the base plate of a stirring friction welding machine after being quickly dried; conducing a single pass aclinal stirring friction welding treatment to the butt joint face to be welded of the AZ31 magnesium alloy by the aclinal stirring friction welding stirring head, wherein the stirring head comprises a cylindrical clamping part, a round table shaft shoulder and round table stirring needle; the stirring head shaft shoulder is concave design, and three spiral grooves are uniformly distributed on the surface of the round table. The welding method and stirring head provided by the invention solve the problem that themechanical property of the welding joint is reduced due to the thinned weld seam when the magnesium alloy sheet is welded by the inclined stirring friction and the problem that the traditional welding method is easy to form pores, cracks and deformations in a weld zone. The welding joint obtained by the invention has beautiful appearance, and the maximum tensile strength of the joint can reach 97.8% of a base metal.

The present invention relates to an apparatus for preparing the following foods (production) continuously, the foods is made by packaging inner material composed of foods such as stuffing or fruit jam etc. by tegmen material composed of foods blank such as bread etc. A blank pressing component is formed integratedly on the peripheral of a nozzle component for extruding inner material, the peripheral part of the tegmen material locating on the upper surface of a carrying component with hatch is clipped between the blank pressing component and the carrying component, and the upper opening of the bowl-shaped tegmen material is closed by the nozzle component and the blank pressing component, so as to prevent the inner material from leaking from the upper opening by maintaining the clipping state when ejecting the inner material into the inner of the tegmen material, and to prevent inner material from leaking to manufacture no good production when sealing the peripheral of the tegmen material. In addition, due to prevent inner material from polluting food manufacture device, it is able to prepare foods continuously without stop the running of the device.

The invention discloses a wall thickness homogenization method adopting isothermal stamping for a titanium alloy thick-wall spherical shell. Through divisional design on friction coefficients of a male die and a to-be-formed plate, the male die and pull rings are heated separately so that a temperature gradient is formed, the wall thickness homogenization of the titanium alloy thick-wall sphericalshell is ensured, the spherical bottom reduction rate is reduced from 50% in conventional forming to below 15%, the overall wall thickness fluctuation of a housing does not exceeds 30% of the wall thickness of a blank and the size is stable. Since the reduction of the spherical bottom is inhibited effectively, the extent of damage of the mechanical property at the spherical bottom is reduced substantially, the overall mechanical property of the titanium alloy thick-wall spherical shell is better, the titanium alloy thick-wall spherical shell is particularly applicable to development and production of a TA7 low-temperature titanium alloy gas cylinder product for a carrier rocket, and is also applicable to the development and production of titanium alloys in other fields and other trademarks and the like products, and the wall thickness homogenization method is very practical.

Disclosed is a process for producing a diaryl oxalate, which involves a step of carrying out the transesterification reaction of a dialkyl oxalate or/and an alkylaryl oxalate with an aryl alcohol in the presence of a tetra(aryloxy)titanium that serves as a catalyst. The process is characterized in that the tetra(aryloxy)titanium is supplied to a reaction system to be used for the transesterification reaction in the form of a solution of the tetra(aryloxy)titanium in an aryl alcohol, wherein the solution is produced by reacting an tetraalkoxytitanium with an excess amount of the aryl alcohol and removing an alkyl alcohol that is produced as a byproduct.

The present invention provides an image forming device which is capable of inhibiting image concentration dis-uniformity on one hand, and preventing a line dust and a line from diming on the other hand when printing images with high image area rate. The image forming device comprises a toner concentration sensor (390) for the concentration of the toner in a detection recycling agent accommodation chamber (311), and an engine control portion which adjusts a write light intensity of an electro-static latent image of a photoreceptor according to an output difference deltaVt of an output voltage of the toner concentration sensor (390) when two screw rod components (304, 305) are driven by a normal rotation speed and an output voltage of the toner concentration sensor (390) when the two screw rod components (304, 305) are driven by speed lower than the normal rotation speed.

The purpose of the present invention is to provide a method for manufacturing a metal molded body, which can suppress thinning of the corner portion, ensure a sufficient flat region, and flatten the ceiling wall. The method for manufacturing a metal molded body is characterized by comprising the following steps of: stretching and molding a flat metal plate so that temporary concave parts and temporary convex parts are alternately arranged to form a temporary molded body: a step in which the temporary concave portion and the temporary convex portion each include a top wall having a concave portion recessed inward; and a step of pressing the temporary formed body and pressing the recessed portions outward to form a formed body in which recessed portions and protruding portions are alternately arranged, the top wall of which is flat.

The invention relates to the technical field of electronic materials, in particular to a processing method of a resistance copper foil material for a mobile phone vibration motor PCB. The method comprises the following steps: providing a resistor copper foil plate, and carrying out cutting treatment, pressing treatment, drilling treatment, electroplating treatment, outer layer film drying, outer layer etching treatment, etching, film drying, differential etching treatment, ink printing, gold plating and lead etching to obtain the resistor. According to the processing method, the resistor copper foil material is adopted to replace a traditional carbon resistor printing ink printing technology, the prepared resistor copper foil material enables the electroplating resistance value of the PCB to be more stable, the precision is higher, and the product yield can be improved; the method is simple and easy to control, high in production efficiency, stable in product quality and beneficial to industrial production.

The invention relates to a method for reaming and corroding a high-medium-voltage electronic aluminum foil in two levels. The method comprises the following steps that a conical tunnel hole with a large opening and small interior is formed the high-medium-voltage electronic aluminum foil after being pretreated and perforated, the two-level reaming corrosion is adopted, the primary reaming corrosion is anode reaming corrosion which is carried out in a corrosive solution with 0.1 to 5 percent by weight of macromolecular corrosion inhibitor, and the secondary reaming corrosion is the anode reaming corrosion which is carried out in a corrosive solution with 0.01 to 0.1 percent by weight of macromolecular corrosion inhibitor. By adopting the method, the tunnel holes with high consistency in aperture can be obtained, not only can the specific capacitance of the aluminum foil be remarkably improved, but also the corrosion thinning of the aluminum foil can be efficiently inhibited, and the yield and the bending performance of the aluminum foil can be improved.

The present invention relates to the technical field of fine chemicals, and in particular relates to a high-performance bird-egg coating preservative. The high-performance bird-egg coating preservative comprises, by weight, 4-8 parts of ethanol, 1-2 parts of oxyethlene higher aliphatic alcohol, 0.5-1 part of Span 80, 0.5-1 part of glycerol, 1-3 parts of beeswax and 30-50 parts of water. Object of the present invention is to provide a safe and practical high-performance bird-egg coating preservative having a wide application range.