123 results about "Secondary bonding" patented technology

A composite that contains an elastic film laminated to a meltblown facing is provided. During lamination, apertures and discrete bond sites may be concurrently formed in the elastic film. The discrete bond sites may be located proximate (adjacent or near to) a perimeter defined by corresponding apertures formed by displacement of the film. The location of the bond sites adjacent to or near the apertures may enhance the durability of the meltblown facing by strengthening the area surrounding the apertures. Furthermore, the content of the elastic film and the temperature/pressure of lamination may be selected to that the film possesses a sufficient tack for adhering to the facing at regions other than those fused together by the bonding elements of the patterned roll. Such secondary bonding further stabilizes the meltblown facing and renders it suitable for printing. Further, the film is under tension in the machine direction during lamination. Subsequent to lamination, however, the film is retracted so that the facing retracts toward its original machine direction length, thereby gathering and forming pleats. It has been discovered that these pleats have a relatively small amplitude (height), as well as a substantially uniform frequency across the surface of the facing. Such a small height and increased regularity improves the ability to transfer an ink to “peaks” of the pleats, thereby improving print quality and uniformity.

A resonator includes an inner perforated tube, an outer shell, and a plurality of annular ribs extending radially therebetween and defining resonant chambers. Progressive stepping of ribs and grooves enables axial insertion assembly with minimal cost. The need for welding or secondary bonding operations is eliminated.

A ball is formed at the tip of a wire projecting from a capillary. The capillary is positioned above an interconnection, and ball bonding forms a bump on the interconnection. The capillary is then moved next to the bump and wedge bonding is carried out. Next, the capillary is moved upward and another ball is formed at the tip of the wire, and the wire is primary bonded to a bonding pad of a semiconductor chip. The wire is then looped and the capillary is positioned above the bump, and secondary bonding is carried out. As a result, the formation of tails on the bump is prevented.

A bonding apparatus (10) that bonds an electrode of a semiconductor die (12) and an electrode of a circuit board (19) using a metal nano paste includes a bump formation mechanism (20) that forms bump by injecting microdroplets of a metal nano paste on each electrode, a primary bonding mechanism (50) that carries out primary bonding to the electrodes in a non-conductive state by pressing the bump of the semiconductor die (12) against the bump of the circuit board (19), and a secondary bonding mechanism (80) that carries out secondary bonding so that the electrodes become conductive by pressurizing the primary bonded bump in bonding direction and by heating the bump to pressurize and sinter the metal nanoparticles in the bump. With this, it is possible to efficiently bond the electrodes with a simple and easy way while reducing a bonding load.

A bonding apparatus (10) that bonds an electrode of a semiconductor die (12) and an electrode of a circuit board (19) using a metal nano paste includes a bump formation mechanism (20) that forms bump by injecting microdroplets of a metal nano paste on each electrode, a primary bonding mechanism (50) that carries out primary bonding to the electrodes in a non-conductive state by pressing the bump of the semiconductor die (12) against the bump of the circuit board (19), and a secondary bonding mechanism (80) that includes a pressurizing unit that pressurizes the primary bonded bump in bonding direction, and that carries out secondary bonding so that the electrodes become conductive by heating the bump up to a temperature higher than a binder removal temperature of the metal nano paste and a dispersant removal temperature of the metal nano paste, removing the binder and the dispersant, and pressurizing and sintering the metal nanoparticles in the bump. With this, it is possible to efficiently bond the electrodes with a simple and easy way while reducing a bonding load.

A wire bonding method that performs a primary bonding of wire on a first bonding point and performs a secondary bonding of the wire on a second bonding point, thus connecting the first and second bonding points with the wire, the secondary bonding including: a first bonding step that forms a first bonding part by bonding the wire to the second bonding point, a second bonding step that forms a second bonding part by raising a capillary through which the wire passes and moving the capillary toward the first bonding point, and then lowering the capillary and overlapping the wire to connect the wire to the first bonding part, and a ting step that cuts the wire.

The invention provides a micro LED transfer method, belonging to the technical field of light emitting display. A semi-etched LED structure is firstly formed, turning over is carried out through one-time transfer, a buffer layer is removed, a separate LED array is formed, a metal layer is formed on an LED, the metal layer is broken on the side wall of the LED at the time, through secondary bonding, the LED is sucked by a transfer suction head and placed on a metal electrode corresponding to a receiving substrate, and after bonding, micro LED transfer is completed. The problem of film breakagecaused by laser lift-off stress release can be improved, and the problem that transfer of a thick metal layer needs a large suction force for pulling can be solved.

A wire bonding apparatus and method involving a computer 41 that has a height position counter 44 that produces height position signals for a capillary 5 by processing signals from a position sensor 29 that detects the position of the bonding arm 20 in the vertical direction. This computer 41 includes a memory 60, which stores the detected position of the capillary 5 at the time that secondary bonding is performed on a bump that is formed in a normal manner on the second conductor, and a comparator circuit 61, which outputs a “bump not-adhered” signal in cases where the output value of the height position counter 44 is outside the permissible error range of the detected position that is stored in the memory 60.

Process for manufacturing a monolithic fan cowl (9) of curvilinear shape for aircraft engines comprising the following steps:

• • a) providing a skin (1) cured, several longitudinal hat frames (3) uncured and several transversal hat frames (5) cured;
  • b) placing said longitudinal hat frames (3) on the skin (1)
  • c) placing said transversal hat frames (5) over the longitudinal frames (3) and the skin (1); d) covering the assembly with a vacuum bag;
  • e) performing an autoclave cycle under high temperature and pressure conditions for co-bonding the skin (1) and the longitudinal hat frames (3), and for a secondary bonding of the transversal hat frames (5) to the skin (1) and the longitudinal hat frames (3).

A surface-modified separation membrane of the present invention comprises a separation membrane, and a coating layer formed on the surface of the separation membrane for improving the contamination resistance and chemical resistance of the separation membrane, wherein the coating layer is implemented with a nanoscale thickness of the coating layer in order to inhibit a decrease in permeation flux of the separation membrane before and after coating the coating layer, and comprises: dopamine for providing, to the coating layer, an adsorption force to be bound stably with the separation membrane; and a hydrophilic material which is bound to the dopamine through secondary bonding or cross-linking containing a hydrogen bond in order to inhibit the deterioration of the durability of the coating layer, and provides hydrophilicity to the surface of the separation membrane in order to protect the separation membrane from hydrophobic contaminants. A method for modifying the surface of a separation membrane of the present invention comprises the steps of: injecting a separation membrane to be surface-modified into a reactor; adding a mixture solution, which is formed by adding a hydrophilic material to a Tris-buffer solution having an adjusted pH range at which dopamine reacts and stirring the same, to the reactor; adding dopamine and an initiator, which induces the cross-linking of the hydrophilic material and dopamine, to the reactor at a predetermined temperature range; and forming a coating layer comprising dopamine and the hydrophilic material on the separation membrane through thermal cross-linking at the predetermined temperature range while injecting oxygen into the reactor.

The invention belongs to the technical field of structural bonded assembly forming, and relates to a secondary bonding forming method of a structural part with curvature. According to the invention, various assemblies are connected without adopting a riveting mode, and various bonded assemblies are integrally formed after being subjected to secondary curing and bonded through the curing of an expanded adhesive film J-99B; and the problem that a butt seam is easy to recess in the pressurizing and curing process of a product is solved through a butt seam unilateral beehive balance discharge process method, so that the product weight is reduced, and the product stability is enhanced.

The invention relates to a composite material plate with a folding sandwich structure and a forming method thereof and belongs to the fields of composite materials and forming technology thereof. A composite material plate or a curved plate with lightweight, adjustable three-dimensional rigidity and a permeable whole body is formed by co-curing a pre-curing folding sandwich structure and pre-curing upper and lower panels, or co-bonding the cured folding sandwich structure and the pre-cured upper and lower panels, or performing secondary bonding on the cured folding sandwich structure and the cured upper and lower panels. The composite material plate has a simple preparation process and high shape adaptability, and can be widely applied to structures with lightweight and capable of resisting shock damage.

The invention relates to the field of circuit board processing, and provides a machining method for circuit board drilling. The method aims to solve the problem that due to wiring of a ball grid array (BGA) PCB with the diameter of 0.6 mm, the yield of a circuit board is difficult to guarantee. The machining method for circuit board drilling includes the following steps that primary bonding is carried out on L2 to Ln-1 layers of circuit boards; mechanical through holes with the diameter of 0.2 mm are drilled; copper electroplating is carried out on the through holes; the through holes are filled with resin; copper is electroplated and covers the through holes filled with the resin; the L1 layer of circuit board and the Ln layer of circuit board cover the L2-Ln-1 layers of the circuit boards for secondary bonding; laser blind holes with the diameter of 4 mil are drilled; copper electroplating is carried out on the blind holes. The invention further provides a circuit board formed through the method. By means of combination of the electroless copper technology processing method and HDI, drilling in the BGA PCB is achieved, so that conducting and wiring functions are achieved, good use performance of products is guaranteed, and the defective rate of the products is lowered.

The invention discloses a novel metal-free connector composite material sandwiched plate connecting structure and a design method thereof. The novel metal-free connector composite material sandwiched plate connecting structure is characterized by comprising glass fiber cloth (1A), a PVC foam core (1B), a composite material sandwiched plate (1), a composite material connector (2) and a composite material reinforcing rib (3), wherein the glass fiber cloth (1A) is layered in a crossed mode respectively at 0 degree and 90 degrees by surrounding the PVC foam core (1B) to prepare the composite material sandwiched plate (1), the composite material connector (2) and the composite material reinforcing rib (3), and a composite material sandwiched plate connecting structure is prepared by secondary bonding. The novel metal-free connector composite material sandwiched plate connecting structure can be used for structures with special requirements, such as high rigidity, high strength, and electromagnetic wave invisibility. Compared with a traditional connecting structure, the novel connecting structure disclosed by the invention has the characteristics of high connecting efficiency, compact structure, capability of meeting the electromagnetic invisibility requirement, simple and flexible molding technology and the like, and has wide application prospect in national defense and industrial equipment.

Provided is a method for manufacturing a semiconductor package. In the method, a wafer for a cap substrate is provided. The wafer for the cap substrate includes a plurality of vias and via electrodes on a lower surface. A wafer for a device substrate is provided. The wafer for the device substrate includes a circuit unit and a connection electrode on an upper surface. The wafer for the cap substrate and the wafer for the device substrate are primarily bonded by a medium of a primary adhesive. A trench is formed to expose the upper surface of the wafer for the device substrate to an outside along an outer edge of the primary adhesive. A secondary bonding operation is performed by a medium of a secondary adhesive to electrically connect the via electrode and the connection electrode. The wafer for the device substrate is diced along a virtual cut line.

Disclosed is a multi-axial fixed geometrical pneumatic vectoring nozzle structure. The multi-axial fixed geometrical pneumatic vectoring nozzle structure is composed of an upper high-pressure secondary flow injection pipe, a lower high-pressure secondary flow injection pipe, a rectangular convergent-divergent nozzle, a left secondary flow suction pipe, a right secondary flow suction pipe, a left Coanda curved surface, a right Coanda curved surface and a skin connected with the nozzle and an airframe. A thrust vectoring state and a non-thrust vectoring state exist during normal operation, and only the high-pressure secondary flow injection pipes and the secondary flow suction pipes need to be closed at the same time for the non-thrust vectoring state. For vectoring conditions, if pitch thrust vectoring needs to be realized, only the high-pressure secondary flow injection pipes are opened, and pitch thrust vectoring angles can be controlled by means of control on flow and pressure of high-pressure secondary flow entering the pipes; if yaw thrust vectoring needs to be realized, the secondary flow suction pipes need to be connected with a vacuum suction device, and different yaw vectoring angles are realized by control on vacuum degree of the vacuum suction device; if pitch control and yaw control are needed at the same time, the two above processed need to be combined.

Methods and compositions for fabricating composite parts including at least one structural material and at least one protective material that are integrally bonded without the use of secondary bonding operations. One or more of the materials forming the layers of the composite parts may be a ceramic composition with or without porosity and one or more of the materials may be a polymer composition. Methods including co-injection processes also are provided for fabricating multi-layered structures in which each layer serves a desired function while still being integrated into the overall structure.

The invention provides an unmanned aerial vehicle electric cabin composite cephalic cone integrated forming tool and process. The unmanned aerial vehicle electric cabin composite cephalic cone integrated forming tool comprises a male molded surface, internal square pipe supports, a blocked metal core model, a metal moving disc, internal center circular pipe supports, positioning pins, fastening bolts, demolding bolts and demolding blocks, four swivels are mounted on the outer side wall of the male molded surface, a vacuum bag area is formed in the surface of the male molded surface, the blocked metal core model sleeves the top of the male molded surface, and the blocked metal core model and the male molded surface are in positioning butt-joint through the positioning pins. According to theunmanned aerial vehicle electric cabin composite cephalic cone integrated forming tool and process, design is reasonable, the assembly accuracy can be guaranteed, it is guaranteed that secondary bonding co-curing forming of a composite cephalic cone and a motor mounting metal clamping disc meets the requirements, and meanwhile the equipment cost can be lowered.

The invention discloses a diamond-based gallium nitride composite wafer and a bonding preparation method thereof. The wafer is provided with a gallium nitride/nucleating layer/silicon carbide/metal intermediate layer/diamond substrate, a gallium nitride/metal intermediate layer/diamond substrate, a gallium nitride/ceramic film layer/metal intermediate layer/diamond substrate and other structures.The method mainly comprises the following steps of thinning a silicon carbide substrate of gallium nitride, or completely stripping the silicon carbide substrate and thinning a gallium nitride layer,carrying out polishing and argon plasma treatment on the silicon carbide substrate or the gallium nitride layer and the to-be-bonded surface of the diamond, depositing a metal buffer layer and a goldfilm on the to-be-bonded surface of the silicon carbide substrate, or depositing a metal buffer layer and a gold film on the to-be-bonded surface of the gallium nitride layer, or depositing a ceramicfilm layer, a metal buffer layer and a gold film, and depositing a metal buffer layer and a gold film on the to-be-bonded surface of the diamond, enabling gallium nitride and diamond to be pre-bondedat first, and then conducting secondary bonding, and carrying out annealing treatment on the diamond-based gallium nitride composite wafer. The bonding strength can be improved.