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184 results about "Gold ball" patented technology

Gallium nitride-based inverted light-emitting diode (LED) with two reflecting layers on lateral surfaces and preparation method thereof

The invention discloses a dual-reflecting layer gallium nitride-based inverted light-emitting diode (LED) with a distributed Bragg reflecting layer and a metal reflecting layer on lateral surfaces and a preparation method thereof. The preparation method comprises the following steps of: sequentially laminating and forming a buffer layer, a N-GaN layer, a multiple-quantum well layer and a P-GaN layer on a sapphire substrate; forming a transparent conducting layer on the P-GaN layer; covering the distributed Bragg reflecting layer on the lateral surfaces of an epitaxial layer and the transparent conducting layer; forming the metal reflecting layer on the distributed Bragg reflecting layer; forming a P electrode ohmic contact metal layer on an alloy metal reflecting layer; forming a N electrode ohmic contact metal layer on the exposed N-GaN layer; and bonding the P electrode ohmic contact metal layer and the N electrode ohmic contact metal layer with a heat radiating substrate through an alloy metal conducting layer and gold ball bonding points. A dual-reflection structure combining the distributed Bragg reflecting layer and the metal reflecting layer is arranged on the oblique lateral surface of an LED chip, thereby the excellent reflectivity of the reflecting layers is fully performed and the light-emitting efficiency of the LED is improved.
Owner:XIAMEN SANAN OPTOELECTRONICS TECH CO LTD

Gold nanoparticle flower or quantum dot composite probe for living cell immunofluorescent labeling and photothermal treatment

The present invention provides are a gold nanoflower structure and a preparation method therefor. The gold nanoflower structure is a gold nanoflower particle, with round-head columns being uniformly distributed at the periphery thereof, obtained by using gold octahedrons, gold balls or gold tetrahedrons as seed crystals and reducing chloroauric acid by using weak reductant in an environment of high-concentration polyvinylpyrrolidone. In addition, also provided in the present invention are a gold nanoflower/quantum dot composite probe for living cell immunofluorescent labeling and photothermal therapy, a preparation method therefor and a use thereof. In comparison with traditional probes, the probe, incorporates the features of photothermal therapy and fluorescent labeling, and is capable of killing cancer cells in an effective and directional way. Two light sources are adopted to bring a tremendous photothermal conversion efficiency and a greater enhancement on fluorescence intensity of quantum dots respectively, thus mutual interference of two effects are avoided tactfully. The coating of silicon dioxide averts the biotoxicity of the gold nanoflower and the quantum dot effectually, enabling the surface of the composite probe to be easily functionalized and also imparting an extraordinarily excellent biocompatibility to the composite probe.
Owner:THE FIRST AFFILIATED HOSPITAL OF ANHUI MEDICAL UNIV

Spun gold ball welding machine, and device and method for adjusting welding spot position thereof

The invention relates to a welding point position adjustment device, a method thereof and a gold ball welding apparatus. The gold ball welding apparatus comprises a base, a workbench and the welding point position adjustment device arranged between the base and the workbench. The welding point position adjustment device comprises a digital vedio recording device, a bracket, a positioning adjustment platform, a driver and a computer, wherein the digital vedio recording device is supported by the bracket and is connected with the computer, the position adjustment platform is used for supporting the workbench and adjusting the position thereof, and the computer is connected with the position adjustment platform by the driver. The method for adjusting the welding point position includes the steps: firstly, pictures of a work piece to weld are taken and transferred to the computer; secondly, after processing the pictures, the computer calculates the position deviation of the welding point; and thirdly, the position adjustment platform is driven to eliminate the position deviation. As an operator is no longer needed to adjust the position of the welding point with a microscope, the training cost is greatly saved, the health of the operator is ensured, and the consistency of the welding quality is improved on the basis of reduced labor intensity and increased production efficiency.
Owner:深圳市因沃客科技有限公司

Production method of encapsulated component of copper wire bonding IC chip

InactiveCN101626008ASolving the crater puzzleSaving wire costSemiconductor/solid-state device detailsSolid-state devicesGold ballPlastic packaging
The invention relates to a production method of an encapsulated component of a copper wire bonding IC chip. A welding plate of the IC chip is provided with a golden ball on which copper bonding balls are stacked, an arch wire is provided with a copper welding point on an inner pin of a lead frame, and a welding plate of the IC chip is connected with the pin of the lead frame. A plastic packaging body is covered on the IC chip, the copper balls stacked on the packed golden ball, the copper welding point of the arch wire on the inner pin of the lead frame and partial inner pins of the lead frame to form a whole circuit. The production method comprises wafer grinding, wafer scribing, core installing, press welding, plastic package, post curing, printing, punching separation, inspection, packaging and warehousing. The invention has simple and reasonable structure, easy use and high qualified rate in encapsulation and testing as well as high reliability, avoids craters, the intensity of the welding point is improved, the pull force of copper welding wires and the shearing strength of the welding point through the production method are greater than that in a copper (golden) bonding production method through direct wire threading, and unsoldering can not happen to the inner welding point.
Owner:TIANSHUI HUATIAN TECH

Method for achieving eutectic soldering of chips

The invention provides a method for achieving eutectic soldering of chips. The method comprises the steps of a, compressible areas in the chips are determined, and a photoetching mask panel is manufactured; b, conducting adhesives in the compressible areas of the chips are removed through a photoetching develop method on a gilded ceramic wafer; c, ball points, used as protruding points, are planted at the position, where the adhesives are removed, on the ceramic wafer through a gold ball bonding method; d, the ceramic wafer is cut into small ceramic wafers consistent with the chips in size through a gear cutting method; e, a tool locating clamp is manufactured according to the shapes of cavities to be welded, and a small ceramic wafer pressing block clamp with gold protruding points makes contact with non-circuit areas of the chips through the protruding points; f, a pressing block is arranged on the small ceramic wafer pressing block clamp, and vacuum compressible soldering of the chips is indirectly achieved. The gilded ceramic wafer is used as the base material, the mature photoetching technology and the ball-bonding ball planting technology are used for manufacturing the protruding points to provide effective mechanical support for soldering, and the method is wide in application range.
Owner:THE 41ST INST OF CHINA ELECTRONICS TECH GRP

Dense-pitch small-pad copper-wire bonded single intelligent card (IC) chip packing piece and preparation method thereof

ActiveCN102437141AAvoiding Solder Joint Shorting ProblemsSolve the previous thread that is easy to bruiseSemiconductor/solid-state device detailsSolid-state devicesGold ballPunching
The invention relates to a dense-pitch small-pad copper-wire bonded single intelligent card 9IC) chip packing piece, which is characterized in that: a lead framework carrier and framework lead inner pins are arranged inside a plastic-sealed body, the lead framework carrier is fixedly connected with an IC chip, the IC chip is provided with a plurality of welding pads corresponding to the framework lead inner pins one by one, each welding pad iis connected with the corresponding framework lead inner pin through a bonding line, a bold ball is respectively welded on a welding pad or on a spaced welding pad in each welding pad group, each gold ball is connected with a first copper bonding ball in a welding way, a crescent copper welding point is punched on the corresponding inner pin to form a first copper bonding line; and the welding pad which is not connected with the gold ball is connected with a second copper bonding ball in a welding way, a crescent copper welding point is also punched on the corresponding inner pin to form a second copper bonding line, and the gold balls in two rows of welding pad groups are alaternatively arranged. Due to the adoption of the packing piece and the preparation method, the open-circuit potential danger of a plastic-sealed punching line caused by a crater on the welding pad, short circuit of two adjacent welding points and a previous line is easy to damage can be avoided.
Owner:TIANSHUI HUATIAN TECH +1

Method for cultivating tree-shaped gold-ball elms

The invention relates to a method for cultivating tree-shaped gold-ball elms. The method aims to create a 'gold-ball ulmus pumila' which is an exotic landscape elm and is a novel type of garden tree, and two colors and two shapes grow on the elm. The method is characterized in that thin and tall elm seedlings are cultivated by a seeding close planting process in April, bare roots are transplanted in the second year, trunks are set when the heights of the tree trunks reach 130cm, and fertilizer and water management and conservation management are intensified, so that growth of the elm seedlings can be promoted; rootstocks and scions with identical thicknesses are selected by a multi-bud long tube sleeving process in July and August, the ulmus pumila scions with the lengths of about 5cm are wrung and sleeved on elm branches (the rootstocks) of which barks with the lengths of 5cm are peeled, scion sleeving tubes are sleeved to the bottoms of the elm branches of which the barks with the lengths of 5cm are peeled, and each scion sleeving tube and the corresponding elm branch are matched with each other without binding or bagging; scion grafting for ulmus pumila cv. Jinye is carried out in the same manner; a top grafting and breed changing procedure is completed; drooping and flat branches of ulmus pumila naturally grow after the ulmus pumila survives, the ulmus pumila cv. Jinye continuously grows upwardly, and a hemispherical crown of the ulmus pumila cv. Jinye can be formed only by means of repeatedly cutting back the ulmus pumila cv. Jinye.
Owner:BEIJING FORESTRY UNIVERSITY

Method for enhancing upside-down mounting welding core plate brightness

The invention relates to a method for lighting up the backbonded chip, which is characterized in plating the metal of high reflectivity onto the original metal circuit and the light absorbed golden ball. The method is: first, oxidizing the silicon substrate with heat reacting furnace to generate a silicon dioxide layer, photoetching the pattern by photo exposure machine and etching the needless silicon dioxide with hydrofluoric acid buffer solution of 1% to 3%, vapor depositing a layer of high reflectivity metal onto the silicon dioxide layer by thermal coater and etching two adjacent positive and negative electrodes which covers 40% to 95% surface areas of the silicon substrate ferric nitrate mixed solution; second, balling the golden balls on the surface of both positive and negative electrodes by balling machine, plating a layer of high reflectivity metal respectively on two positive and negative electrodes and the golden balls by thermal coater, etching the high reflectivity metal layer with hydrofluoric acid buffer solution and the left metal layer is adhered to two positive and negative electrodes and the golden balls; finally, converting the chip by wire bonder to make its electrodes aligned with the golden balls, and compaginating the electrodes with golden balls by heating and ultra audible sound. The invention has the advantage of increasing the optical efficiency of 40% more than that of traditional backbonded chip.
Owner:上海蓝宝光电材料有限公司

Packaging structure and packaging method of module comprising bare chips of thin-film bulk acoustic wave device

The invention discloses a packaging structure and packaging method of a module comprising bare chips of a thin-film bulk acoustic wave device. The packaging structure of the multi-chip module comprises a substrate and bare chips, wherein the bare chips include the bare chips of the thin-film bulk acoustic wave device and other functional bare chips; electrodes of all bare chips are correspondingly connected with electrodes of the substrate through golden balls in a flip-chip manner; a film is bonded and fixed on the surface of the substrate; the film is clung to the surface of the substrate and coats all bare chips; and vacuum chambers are formed between all bare chips and the substrate. The electrodes of the bare chips on the to-be-packaged multi-chip module are welded on the corresponding electrodes in corresponding packaging areas on the substrate through a flip-chip technology during packaging; the protective film is laminated on the substrate through a vacuum laminating technology and coats all chips; and heating and solidifying are carried out and the substrate is finally cut according to the packaging areas. According to the packaging structure and the packaging method, the bare chips are directly adopted for packaging, so that the volume is greatly reduced in comparison with that of original secondary packaging, and meanwhile, the packaging efficiency is improved.
Owner:CHINA ELECTRONICS TECH GRP NO 26 RES INST

Display panel, manufacturing method and display device

ActiveCN109541856AIncrease the area that the overlay can accommodateBox heightNon-linear opticsGold ballSolder ball
The invention discloses a display panel, a manufacturing method and a display device. The display panel is divided into a display area and a non-display area, and comprises a first substrate, a secondsubstrate, a gold ball, and frame glue. The gold ball communicates with the first substrate and the second substrate, and the area where the gold ball is disposed is a transition area. The frame glueis disposed between the first substrate and the second substrate. The display panel further comprises a retaining wall disposed on the non-display area of the first substrate or the second substrate.The retaining wall is placed on one side of the frame glue to block the frame glue, and comprises a bent portion and a flat portion. The bent portion is connected to the flat portion, corresponds tothe position of the transition area, and protrudes from the flat portion in a direction away from the gold ball. The bent portion in the scheme corresponds to the position of the gold ball, expands outwards in the direction away from the gold ball, enlarges the area in which the frame glue and the gold ball are overlapped, so that the thickness of a box at the edge of the display area can be prevented from being increased, the risk of light leakage is reduced, and the quality of the display panel is improved.
Owner:HKC CORP LTD
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