30results about How to "Orientation controllable" patented technology

The invention discloses a method for inducing growth of an intermetallic compound with the specific grain orientation and the specific number of films through laser forward transfer printing. The method comprises the following steps that firstly, a seed layer is prepared on the surface of a substrate; secondly, a metal film is continuously prepared on the surface of the seed layer; thirdly, the Sn film is prepared on the surface of metal film; fourthly, the substrate and the two films are heated, so that the intermetallic compound film is prepared; fifthly, the intermetallic compound film is transferred to the surfaces of a chip and bonding pads of the substrate respectively; sixthly, the surface of the intermetallic compound film is plated with the Sn film; and seventhly, the bonding pads are in butt joint, pressure is applied, the bonding pads are placed in a reflow furnace, and the stages of preheating, heat preservation, reflowing and cooling are performed. By the adoption of the method, the preparation time of a welding spot of the intermetallic compound capable of being used for high-temperature packaging and interconnection is greatly shortened, the grain orientation and the number of following growing intermetallic compounds are controlled, the welding spot of the intermetallic compound is quickly prepared, and the microstructure is controllable.

The invention provides a method for preparing a polymer nanowire with a controllable molecular orientation, which comprises the following steps: preparing a nanoporous alumina template; melting and pressing the polymer into a polymer film with a thickness of about 10-200 microns; The polymer film is placed under the nanoporous alumina template, and the two are in close contact. In a vacuum environment, heat to 30-50°C above the melting point of the polymer, and keep it for more than 24 hours, so that it is sucked into the porous oxide film. then cooled to 40-110°C below the melting point of the polymer for more than 10 hours; then cooled to room temperature; removed excess material on the surface of the template; immersed the polymer-containing nanoporous alumina template into hydrogen peroxide In the potassium solution, after the template material is dissolved, the oriented polymer nanowires are obtained. The orientation of the polymer molecular chains obtained by adopting the technical solution of the present invention is controllable, and the molecular orientation of the obtained polymer nanowires is uniform.

The invention discloses a method for preparing a thin film of a quasi-one-dimensional structural material with controllable orientation. The method is based on a vertical evaporation tube furnace, and specifically includes the following steps: (1) placing the evaporation source material and the substrate to be deposited on the In the vertical evaporation tube furnace; (2) vacuum treatment, so that the vacuum degree of the vertical evaporation tube furnace remains at the preset vacuum degree and the fluctuation does not exceed ± 1Pa; (3) heat treatment in the heating zone, so that The evaporation source material is evaporated and deposited on the substrate to form a thin film; during the preparation process, the orientation of the formed quasi-one-dimensional material film can be controlled by controlling the parameters of the evaporation process. The present invention improves the key process parameters of the preparation method, adopts a vertical evaporation tube furnace with a specific structure for deposition, realizes the deposition and orientation control of a quasi-one-dimensional material film, and obtains a semiconductor film with a controllable orientation independent of the substrate , compared with the prior art, it can effectively solve the problem that the orientation of quasi-one-dimensional materials cannot be controlled.