37results about How to "Reduce coplanarity" patented technology

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.

An electrical connector has an insulative body, a group of first conductive terminals and a group of second conductive terminals fixed to the insulative body, a grounding metal plate and an outer shielding shell. A front part of the shell forms a first mating cavity and a rear part of the shell forms a second mating cavity. An insertion space is formed between elastic extending arms of the first terminal group and elastic extending arms of the second terminal group. An electrical connector combination, which includes the electrical connector and a circuit board, is further provided. An inserted portion of the circuit board can be correspondingly inserted into the insertion space and can be elastically interposed by the elastic extending arms of the first terminal group and the elastic extending arms of the second terminal group so as to be correspondingly electrically connected.

The invention discloses an organic compound and an organic electroluminescence device, which relates to the technical field of organic electroluminescence, and its structural formula is as follows: wherein, X is O or S; R1‑R3, R5‑R14, R18, R19 , R20 are the same or different, each independently selected from hydrogen, deuterium, substituted or unsubstituted C6-C20 aryl, substituted or unsubstituted C5-C20 heteroaryl; the compound of the present invention is applied to useful In the electroluminescent device, under the same current density, the luminous efficiency of the device has been greatly improved, the starting voltage has been reduced, the power consumption has been relatively reduced, and the life span has been increased accordingly.

The invention discloses a fluorenyl-[beta]-carboline compound, an application thereof as an organic light-emitting material and an aggregation-induced emission enhancement material, and a preparation method of the compound. In the invention, two functional structure units, [beta]-carboline and fluorene, are bonded to each other through an acylhydrazone bridge bond to obtain the novel fluorenyl-[beta]-carboline organic light-emitting molecule. The compound has dual-emission and aggregation-induced emission enhancement characters, has stable structure, is not liable to crystallize, is good in film-forming property and has strong practicability. The preparation method employs low-cost and easy-to-obtained raw materials, is less in synthetic steps, is simple in operations, is simple in purification and is easy to achieve industrial production.

The present invention discloses a polyketene compound shown as a formula I. Two fluorophenylindole functional groups are connected through a polyene dione bridge bond to form the polyketene organic light-emitting material having a bi-fluorescence emitting characteristic, and the material is endowed with a solid red light emitting characteristic, compatibility and processability. The polyketene compound as the bi-fluorescence emitting organic light-emitting material shows a good red light emitting characteristic in a solid state. The polyketene bi-fluorescence emitting organic light-emitting material can be adopted directly as a red light emitting material and used in fields such as light-emitting devices, laser dye, anti-counterfeiting technology, light-converting materials, fluorescence sensitivity and biomedical analysis.

The invention discloses an imidazole tri-acylhydrazone compound shown in formula I, an application of the compound as an organic light-emitting material as well as a preparation method of the compound. Four functional structure units, namely, an imidazole group, an acylhydrazone group, a diarylethene group and a naphthyl group, are effectively combined in one molecule, and a novel multi-functional-group imidazole tri-acylhydrazone organic light-emitting molecule is formed. The preparation method of the light-emitting material comprises steps as follows: (1) preparation of an intermediate, namely, imidazole trimethyl tricarboxylate; (2) preparation of an intermediate, namely, imidazole trimethyl hydrazide; (3) preparation of a target product, the imidazole tri-acylhydrazone. The preparation method is simple and comprises few synthesis steps, raw materials are easy to obtain, the cost is low, and purification and industrialization are easy. The imidazole tri-acylhydrazone compound is stable in structure and easy to store and shows stronger fluorescence emission under solution and solid states. The light-emitting material is good in stability and can be applied to fields of light-emitting devices, fluorescence sensing and the like.

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 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 relates to a blue-light semiconductor material containing bispyrazolopyrene, a preparation method thereof, and an organic light-emitting device made of the material, which solves the problem that the spectrum of devices made of existing pyrene-based blue-light materials is under long-term or high-voltage conditions Unstable technical issues. The blue-light semiconductor material containing bispyrazolopyrene provided by the present invention reacts bispyrazolopyrene with bromide containing R groups to generate bispyrazolopyrene derivatives containing R substituents. The prepared blue-light semiconductor material containing dipyrazolopyrene has high luminous efficiency, and the high luminous efficiency indicates that the compound can be used as a light-emitting material or a light-emitting host material, especially as a phosphorescent blue host material for organic electroluminescence. The light-emitting device exhibits high efficiency, high brightness and long life, and has the advantages of low manufacturing cost, which reduces the manufacturing cost of the organic electroluminescent device.