Gyrotron Technology, Inc.

Mykhaylo Shevelev

Vladislav Sklyarevich

A method for laminating an assembled sandwich structure consisting of a functional part () and one glass article () separated from an outer surface of the functional part by a laminating film () by heating with electromagnetic radiation in a vacuum is described. In the method equal temperatures of all sandwich components are provided by selection of the optimal radiation frequencies. The optimal vacuum level is provided following the laminating film temperature.

Method of autoclave-free laminating

A method and system for doping semiconductor materials using microwave exposure. In some embodiments, the surface of a semiconductor substrate coated with a layer of dopant material is exposed to a beam of microwave radiation, with the frequency of the microwave radiation chosen to coincide with a microwave absorption resonance of the dopant. A gyrotron is a preferred source of monochromatic microwaves capable of delivering the appropriate the power density. Under this microwave exposure, the dopant heats up and diffuses into the semiconductor. Since only the dopant is selectively excited, the atoms of the crystal lattice remain cooler. Additional cooling can be provided by a flow of cooling gas onto the surface. When the electric field of the microwave exposure is high enough to overcome the potential barrier of interstitial diffusion within the crystal, the dopants migrate to vacancies in the crystal lattice, and the semiconductor material becomes activated.

Method and system for doping semiconductor materials

A method of thermal compacting of an airbag cushion is described where rapid heating is conducted by a microwave beam directed at a mold through a radiation transparent wall without materially heating the mold itself.

Method of compacting airbag cushions

A method for strengthening a glass article. The method includes exposing a selected area of the glass article to a beam of electromagnetic radiation in order to diffuse first alkali metal ions in the selected area out of the glass article and to diffuse second alkali metal ions on a surface of the glass article and in the selected area into the glass article. The second alkali metal ions are larger than the first alkali metal ions. The beam of electromagnetic radiation heats first alkali metal ions and the second alkali metal ions to a temperature that is greater than that of a glass network of the glass article.

Method for the chemical strengthening of glass

The invention relates to a method and apparatus for laminating glass articles without using an autoclave. The sandwich structure to be laminated is preheated than is placed in a controllable vacuum and subjected to electromagnetic radiation with specified frequencies and power. The final heating is provided by convectional heat source. Pressure that is applied continuously during the radiating, heating and cooling steps is also specified for achieving an appropriate bond. An apparatus appropriate for realizing the invented process is also provided. The apparatus includes a loading table, three furnaces, and a cooling chamber which are adjusted to and adjoined to each to other. These parts provide the necessary conditions for high-quality laminating simple and multi-sandwich structures with high production rate and efficiency. The apparatus is inexpensive and fits into the space of two glass article lengths.

Method and apparatus for laminating glass sheets

A method for laminating glass sheets wherein laminating film () is placed over one surface of a first glass sheet () and the film () is heated with short wave radiation () to a bonding temperature. Heated areas () of the film () are successively pressed to the glass sheet () in a continuous manner for purging air from between the film () and the first glass sheet () and for applying bonding pressure. The pressed film areas () are then cooled whereby an appropriate bond is attained between the film () and the first glass sheet (). Thereafter the first glass sheet () with its bonded film is subjected to a partial vacuum and a second glass sheet () is positioned on the film () and the second glass sheet () is pressed () to the film (). The film () is then reheated in selected areas with short wave radiation () to a bonding temperature and thereafter cooled whereby an appropriate bond is obtained between the selected film () areas and the second glass sheet () to provide a glass lamination.

Method for laminating glass sheets using short wave radiation

A method for laminating glass sheets wherein laminating film is placed over one surface of a first glass sheet and the film is heated with microwave radiation to a bonding temperature. Heated areas of the film are successively pressed to the glass sheet in a continuous manner for purging air from between the film and the first glass sheet and for applying bonding pressure. The pressed film areas are then cooled whereby an appropriate bond is attained between the film and the first glass sheet. Thereafter the first glass sheet with its bonded film is subjected to a partial vacuum and a second glass sheet is positioned on the film and the second glass sheet is pressed to the film. The film is then reheated with microwave radiation to a bonding temperature and thereafter cooled whereby an appropriate bond is obtained between the film and the second glass sheet to provide a glass lamination.

Method for laminating glass sheets using microwave radiation

A method of thermally treating a glass or glass-like material, preferably a glass sheet, without the use of conventional tunnel-type furnaces, to effect rapid heating of glass and glass-like materials from any initial temperature to any required temperature so that the glass sheet can be processed by shaping, bending, tempering, annealing, coating and floating of the glass sheet without cracking of the glass sheet is described. In the inventive method a microwave radiation with appropriate uniformity, frequency and power density is chosen so as to accomplish glass heating from any initial temperature to any required (e.g., softened) temperature in a selected short time while ensuring that the temperature distribution on the external surfaces and in the interior of the glass sheet that arises from microwave exposure is uniform enough to prevent the exposed glass sheet's internal thermal stress from exceeding its modulus of rupture, thereby avoiding glass breakage.

Growing community of inventors

Feasterville, PA, United States of America

Mykhaylo Shevelev