37results about How to "Reduce coplanarity" patented technology

Embodiments provide a wiring board which is structured to be suitable for connection with components, whereby its reliability can be improved. An embodied wiring board of the invention has pads and a solder resist in which opening portions which expose the pads are formed. Protrusion-shaped members are fixed to some of the surfaces of the pads. The surfaces of the pads and the surfaces of the protrusion-shaped members are covered with solder bumps. The height of the solder bumps is larger than the height H1 and H2 of the protrusion-shaped members. The opening portions have different inner diameters, and the volume of the protrusion-shaped members increases as the diameter of the opening portion decreases.

A modular probe card comprises a printed circuit board, an interposer, and a probe head where the printed circuit board has a plurality of first contact pads, the probe head has a plurality of second contact pads. The interposer is disposed between the printed circuit board and the probe head where the interposer includes a substrate and a plurality of pogo pins. The substrate has a first surface, a second surface, and a plurality of through holes penetrating from the first surface to the second surface. The pogo pins are secured in the through holes of the substrate. Each of the pogo pins has a first contact point, a second contact point, and a spring therebetween, whereby the first contact points are elastically extruded from the first surface to contact the first contact pad, and the second contact points are elastically extruded from the second surface to contact the second contact pad, so as to overcome the poor electrical connections between the printed circuit board and the probe head through the interposer due to poor coplanarity of the first contact pads of the printed circuit board.

The invention provides an arylamine compound and an organic luminescent device thereof, and relates to the technical field of organic photoelectric materials. The arylamine compound is obtained by connecting substituted or un-substituted carbazole, benzothiophene and a thick derivative of benzofuran onto an arylamine main body, so that with cavity transmission ability is relatively strong, good thermal stability is good, good film-forming property is good and synthesis is simple and easy easy-to to-operate synthesis. The arylamine compound can be applied to the organic luminescent device as acovering layer of or a cavity transmission layer, so that the problem that carrier transmission in the organic luminescent device is unstable and light out-coupling efficiency is low in the organic luminescent device can be effectively solved; and the organic luminescent device has the advantages of being high in luminescent efficiency and long in service life.

The invention provides an organic electroluminescence device and relates to the technical field of organic electroluminescence. According to the invention, compounds shown as chemical formula I and IIare applied to the organic electroluminescence device, are jointly used as a hole transport layer of the device and are adaptively combined with each other, so that heat stability and carrier transport property of the material are effectively promoted, compounding probability of carrier is promoted, driving voltage of device is effectively reduced, luminous efficiency of device is increased, service life of device is prolonged and the problems of low heat stability of material, short service life and low luminous efficiency of the organic electroluminescence device are effectively solved.

An electronic device manufacturing method includes: setting a solder material on electrodes of a first circuit assembly; setting a resin having a flux action on one surface of a second circuit assembly so as to entirely cover solder bumps formed on the one surface of the second circuit assembly; setting the second circuit assembly on the first circuit assembly via the resin so that the solder material set on the electrodes of the first circuit assembly and the solder bumps of the second circuit assembly are put into contact with each other; and applying thermal energy to connecting portions between the solder material and the solder bumps and to the resin. By carrying out these processes, an electronic device in which the first circuit assembly and the second circuit assembly are joined together and in which their junction portions are sealed by the resin is manufactured. As a result, in the electronic device, junction reliability can be improved.

Disclosed is a substrateless semiconductor package having a plurality of scribe lines formed on a heat spreader, primarily comprising the heat spreader, a chip disposed on the heat spreader and an encapsulant. Formed on a thermally dissipating surface of the heat spreader are a plurality of scribe line grooves with a plurality of openings formed inside to penetrate through the die-attaching surface of the heat spreader. The chip is disposed on the die-attaching surface and the encapsulant is formed on the die-attaching surface to encapsulate a first surface of the chip on which a plurality of external pads are formed Without being covered by the encapsulant. Therein, the encapsulant is filled in the scribe line grooves via the openings so that a scribe line pattern exposed from the thermally dissipating surface is formed.

The invention discloses a fluoro phenylindole compound which adopts a structure shown in formula I, application of the fluoro phenylindole compound as a red organic luminescent material, and a preparation method of the fluoro phenylindole compound. The fluoro phenylindole compound is obtained through a reaction between cyclohexanone and 3-(3-(4-fluorophenyl)-1-isopropyl-1H-indole-2-yl) acrolein under an alkaline condition. The preparation method is simple to operate, convenient for synthesis and easy for purification; the obtained fluoro phenylindole compound is stable in structure and can be utilized for fluorescence conversion on a strong red color displayed under 800-nm laser excitation, thereby having potential application values in such fields as luminescent equipment, anti-counterfeit technologies, laser dye and fluorescence sensing; the research field of the fluoro phenylindole compound is expanded.

The invention provides an aromatic amine compound and an organic light-emitting device thereof, and relates to the technical field of organic photoelectric materials. An aromatic amine main body structure is connected with three substituted or non-substituted 3,5-diphenylbenzene group to obtain the aromatic amine compound, the aromatic amine compound has good hole transport ability, and is high inreflectivity, good in film-forming property and good in thermal stability, synthesis is simple and is easy to operate, the aromatic amine compound can be applied to the organic light-emitting deviceand serves as a hole transport layer and/or a covering layer, the problems that the organic light-emitting device is severe in light loss and low in light emitting efficiency, heat of the device is accumulated, the efficiency of the device is severe in roll-off, and the service life is short are solved, and the organic light-emitting device has the advantages of high light-emitting efficiency andlong service life.

The invention provides a fluorine derivative and an organic electroluminescent device thereof, and relates to the technical field of organic photoelectric materials. The fluorine derivative is formedby connecting a strong electron-withdrawing group on one side of a fluorene main structure through double bonds and connecting a triphenylene structure on the other side, has good electron transport ability and hole transport ability, is capable of effectively improving the injection rates and exciton recombination rates of current carriers in light emitting layers, is good in thermal stability, good in film formation property, simple to synthesize and easy to operate, can be applied in an organic electroluminescent device to serve as a light-emitting layer main body and/or a hole blocking layer, and is capable of effectively solving the problem that organic light emitting devices are unbalanced in current carrier transport, low in luminous efficiency, short in service life and unstable incolor of light; and the organic electroluminescent device has the advantages of being low in driving voltage, high in luminous efficiency and long in service life.

The invention discloses a 9,10-diphenyl anthracene derivative as reactive luminescent agent, a preparation method thereof and a high-efficiency weak light upconversion system prepared from the reactive luminescent agent 9,10-diphenyl anthracene derivative. Reactive upconversion luminescent agents are obtained by introducing reactive groups (such as benzaldehyde and decyl alcohol) into the 9,10-position of the anthracene ring; meanwhile, by introducing an aldehyde group and hydroxyl formaldehyde into different positions (such as ortho-, meta-, and para-), energy level difference (DEST) of singlet state (ES) and triplet state (ET) of the reactive luminescent agent is changed, and a plurality of novel luminescent agents with higher upconversion efficiency than that of a current star luminescent agent DPA are obtained. The luminescent agent has selective upconversion response characteristic to solvent polarity, and the upconversion efficiency obtained by a binary system prepared from the luminescent agent and a photosensitizer exceeds the highest value reported in the prior art.

The invention discloses a solid broadband green-light emission crystal material which is as shown in a formula I. Indole and pyrazolone serving as functional structure units are combined through an aza butadiene bridge bond phase to form a bis-heterocyclic organic light-emitting crystal material of aza butadiene bridging. The material has good green-light emission characteristics in crystalline state and solution. The material serving as an organic light-emitting material is used for the fields of light-emitting devices, laser dyes, fluorescence sensing, anti-counterfeiting techniques and biomedical analysis.

The invention provides a pyrazine united pyrimidine derivative and its organic lighting device, and relates to the technical field of an organic optoelectronic material. A bipolar transmission material is acquired through connecting different genes on a pyrazine united pyrimidine main body, the pyrazine united pyrimidine derivative has strong cavity transmission ability and electronic transmissionability, good thermal stability, good film forming property, simple synthesis and is easy to operate. The pyrazine united pyrimidine derivative can be used as a hole transport layer or an electronictransmission layer in the organic lighting device, and can effectively solve the problems of imbalance carrier flow transmission, low lighting efficiency, and short service life in the organic lighting device; the organic lighting device has the advantages of being high in lighting efficiency and long in service life.

The invention discloses a fluorophenyl pyrimidine solid green emission organic light-emitting material and a preparation method thereof. The novel fluorophenyl pyrimidine solid green emission organic light-emitting material is formed by binding two types of functional structural units of propyl substituted cycloketone and isopropyl methylsulfonyl amino-fluorophenyl pyrimidine through poly-ketene bridge bonds. The fluorophenyl pyrimidine solid green emission organic light-emitting material can embody solid broadband green emission characteristics when in a solid state. The preparation method of the fluorophenyl pyrimidine solid green emission organic light-emitting material is simple in operation and convenient to synthesize; the obtained fluorophenyl pyrimidine solid green emission organic light-emitting material is high in stability and practicality and can be applied to fields such as luminescent devices, laser dyes, anti-counterfeit technology, fluorescence sensing and biomedical analysis. The fluorophenyl pyrimidine solid green emission organic light-emitting material expands the study and application field of fluorophenyl pyrimidine compounds. As shown in the chemical formula, X is C or N.

The invention discloses a bipolar green phosphorescent host material and an organic electroluminescent device. The structural formula of the material is as shown in the specification. Compared with acontrast example, the organic electroluminescent device prepared from the bipolar green phosphorescent host material has the advantages that: the voltage is greatly reduced, and the luminous efficiency is remarkably improved. Therefore, the bipolar green phosphorescent host material disclosed by the invention can greatly reduce the driving voltage of the device, greatly reduces the consumption ofelectric energy and remarkably improves the luminous efficiency. In addition, by reducing the driving voltage, the service life of the organic electroluminescent device is remarkably prolonged.