33results about How to "Roughness is easy to control" patented technology

The present invention provides a semiconductor device package comprising a substrate with at lease a pre-formed die receiving cavity formed and terminal contact metal pads formed within an upper surface of the substrate. At lease a first die is disposed within the die receiving cavity. A first dielectric layer is formed on the first die and the substrate and refilled into a gap between the first die and the substrate to absorb thermal mechanical stress there between. A first re-distribution layer (RDL) is formed on the first dielectric layer and coupled to the first die. A second dielectric layer is formed on the first RDL, and then a second die is disposed on the second dielectric layer and surrounded by core pastes having through holes thereon. A second re-distribution layer (RDL) is formed on the core pastes to fill the through holes, and then a third dielectric layer formed on the second RDL.

A packaging structure provided by the invention includes a substrate having a crystal grain receiving through hole, a contact through hole and a first contact pad; the crystal grains are placed in the crystal grain receiving through hole, wherein the crystal grains have a lenticule area. A transparent cover covers the lenticule area. Peripheral materials are formed below the crystal grains and fill a gap between the entering crystal grains and a side wall of the crystal grain receiving through hole. A dielectric layer is formed above the crystal grains and the substrate. A re-distribution layer is formed on the dielectric layer to couple the first contact pad. A protection layer is formed on the re-distribution layer. A second contact pad is formed on a lower surface of the substrate and below the contact through hole. And a transparent substrate is formed above the protection layer.

The invention relates to a mixing potential NO2 sensor based on sand-blast machining type porous YSZ (Yttria Stabilized Zirconia) base plate and a preparation method of the sensor, and belongs to the technical field of gas sensors. The mixing potential NO2 sensor is mainly used for detecting automobile tail gas exhaust and sequentially comprises an Al2O3 ceramic plate, a YSZ base plate, a reference electrode and a sensitive electrode, wherein the Al2O3 ceramic plate is provided with a Pt heating electrode; the YSZ base plate has a rough porous surface; the reference electrode is made of strip-shaped Pt; the sensitive electrode is made of strip-shaped NiO; the two electrodes are mutually discretely and symmetrically prepared on the rough surface of the YSZ base plate; the lower surface of the YSZ base plate is adhered to the Al2O3 ceramic plate together. According to the mixing potential NO2 sensor, the sand-blast machining type YSZ base plate is utilized as electrolyte, and a rough porous structure of the surface of the sand-blast machining type YSZ base plate increases the contact of gas to be tested and the electrolyte so as to increase reaction activity sites, so that the purpose of enhancing the sensitivity of the sensor is achieved.

The invention discloses a method for constructing a metal-based hydrophilic-hydrophobic stripe-interface surface, which belongs to the technical field of non-silicon micromachining and preparation of micro-nano functional materials. In this method, the metal wire is tightly wound on the substrate, and sintered under the pressure of a heavy object to form a whole. After the obtained sintered body is immersed in a suspension of hydrophobic nanoparticles, the hydrophobic nanoparticles are deposited on the area of ​​the substrate that is not covered by the metal wire. Superhydrophobic stripes are formed after the film is hardened; the metal wire is peeled off from the substrate, and the exposed area forms hydrophilic stripes; the distance and width of the surface stripes between the metal-based hydrophilic and hydrophobic stripes can be adjusted by the diameter of the metal wire and the pressure of the weight, respectively. , the method is simple, easy to operate, and has broad application prospects.

The invention discloses a preparation method of electroless copper plating on the surface of silicon nitride ceramics with high thermal conductivity. Copper treatment and heat treatment in a protective atmosphere. This method forms a metal copper layer with strong adhesion and smoothness on the surface of the green body. It is easy to operate and high in processing efficiency. It can avoid the accumulation of laser thermal effects, save resources, and the surface roughness of ceramics is controllable.

The invention provides a dental implant including a dental implant body and an abutment part, wherein the abutment part is arranged on the dental implant body, and the abutment part is formed integrally with the dental implant body. The invention also provides a 3D printing preparation method of the dental implant. The 3D printing preparation method disclosed by the invention can overcome shortages of an individuated dental implant manufactured by a conventional mechanical processing technology, effectively solves the processing technology problems of a complex dental implant structure, at the same time, makes the design form and type of the dental implant more open, improves the processing efficiency, greatly reduces the processing cost, and reduces the post-treatment process. The requirement on the equipment accuracy is not as high as mechanical-processed equipment, the roughness degree of an outer surface is controllable, and surface sandblasting treatment procedures are reduced. An integrally-formed structure of the dental implant provided by the invention can avoid the micro leakage problem of a traditional two-section connection. The dental implant provided by the invention is more beneficial for immediate implantation, reduces bone loss, reduces the operation process, and allows a operation to become a minimally invasive operation or even a noninvasive operation.

The invention discloses a superhydrophobic fabric and a preparation method thereof. Using fluoroalkyl aromatic amine as the reaction monomer and sodium nitrite as the diazotization reagent, the aromatic amine diazonium salt is obtained through low-temperature diazotization in dilute acid solution; the diazonium salt is reduced under the action of a chemical reducing agent A fluorine-containing aromatic radical is formed; the diazo radical monomer undergoes a single-electron free radical-initiated polymerization reaction on natural fabric fibers to prepare a superhydrophobic fabric with a roughened fiber surface. The fabric treatment of the present invention is completed by grafting and polymerization at room temperature, the production process conditions are mild, high equipment requirements and possible potential risks of electrochemical reduction are avoided, and the product preparation process is simple and safe in operation. As a super-hydrophobic fabric obtained by chemical grafting, the fiber surface coating is covalently bonded to the fiber, which has excellent fastness and does not affect the wearing performance of the fabric. It solves the problem of obtaining super-hydrophobic fabric fastness by coating and other methods. Poor puzzle.

The invention belongs to the technical field of electroplating and particularly relates to an electroplating technology for satin nickel of a back coating mold and the application of the back coatingmold electroplated with the stain nickel. Polishing treatment, oil removal treatment and acid pickling treatment are conducted on the surface of a copper mold; then electroplating of the stain nickelis conducted, wherein the copper mold is used as the cathode, a titanium basket containing nickel cakes is used as the anode, the copper mold and the titanium baske are placed in a satin nickel plating solution for electroplating, and a layer of satin nickel having certain roughness is obtained from the surface of the copper mold. Through addition of a non-ionic surface active agent and a stabilizer to a watt type plating solution, the satin nickel electroplating technology achieving the aims that the plating solution can be recycled, the change of the roughness of the plating layers is smallafter the plating solution is recycled, the surface roughness is uniform, and the roughness is controllable is obtained.

The invention provides a clutch main cylinder which comprises a main cylinder main body, a first leather cup, a second leather cup, a piston and a return spring. A cavity body is arranged inside the main cylinder main body. An oil inlet is formed in the main cylinder main body which is provided with a first ring-shaped groove and a second ring-shaped groove, wherein the first ring-shaped groove and the second ring-shaped groove are arranged at two sides of the oil inlet. The first leather cup is arranged in the first ring-shaped groove. The second leather cup is arranged in the second ring-shaped groove. The piston is arranged on the inner sides of the first leather cup and the second leather cup. A first end of the piston is connected with a push rod at a first end of the main cylinder main body. An inner hole is formed in the piston and opens towards a second end of the piston. A compensation hole is formed in the side wall which is provided with the inner hole on the piston. When the piston is located at the first end of the main cylinder main body, the compensation hole is located between the first leather cup and the second leather cup and is communicated with the oil inlet. A first end of the return spring is fixed at a second end of the main cylinder main body. A second end of the return spring is contained in the inner hole of the piston. The clutch main cylinder effectively solves the problems that due to the fact that a sealing part frequently rubs the cylinder body, the sealing part is prone to abrasion.

The invention relates to a thermoelectric battery pack, comprising upper and lower casings, heat transfer layers of the upper and lower casings, and thermoelectric battery units; A number of groove-shaped positioning structures for the thermoelectric battery unit, whereby the upper case and the lower case can be embedded with thermoelectric battery units arranged in a 3×3 arrangement, or connected in parallel or in series, or mixed in parallel and in series; each thermoelectric battery unit is equipped with Positive and negative poles and temperature sensors; there are upper and lower cushioning heat conduction and shock absorbing pads in the gap between the thermoelectric battery unit and the upper and lower shells; the upper and lower shells are connected by screw joints or spot welding to form a battery pack as a whole. The invention is reasonably strong, sealed and shock-resistant through structural design; through grinding and polishing the working surface and adjusting the parallelism, the parallelism and precision of the working surfaces of the upper and lower shells are guaranteed and has low thermal resistance; the production and assembly are convenient and easy to use , long working life, can be actively promoted and applied.

The invention discloses a radiating structure, which comprises a double-layer circuit board, a bottom shell and a radiating fin, wherein the double-layer circuit board comprises a first circuit board and a second circuit board which are mutually fit; the first circuit board is provided with a first opening; the second circuit board is correspondingly provided with a second opening bigger than thefirst opening; a fixed connection zone is formed between the first opening and the second opening by the first circuit board; the bottom shell is fit below the second circuit board and is correspondingly provided with a third opening with the size equal to that of the second opening; the radiating fin is fixedly arranged below the bottom shell; a metal substrate with an adaptive shape is embeddedin the space formed by the second opening and the third opening; the upper surface of the metal substrate is fixedly connected with the fixed connection zone and the lower surface thereof is contacted with the radiating fin; and an electronic component is embedded in the first opening and the radiating part of the electronic component is fixedly connected with the upper surface of the metal substrate. The invention correspondingly provides an electronic device with the radiating structure and a manufacturing method of the radiating structure. The invention has better radiating effect, lower cost and higher product reliability.