Patent application number | Description | Published |
20080257401 | Photovoltaic module and method for production thereof - The photovoltaic module comprises front and rear plates. An organic seal is arranged between the plates and delineates a tight internal volume, kept at a pressure lower than atmospheric pressure, wherein the photovoltaic cells are arranged. The seal is an organic seal, for example of thermoplastic nature, for example of the polybutylene family. The production method comprises formation of a negative pressure by suction. The method can comprise sweeping by neutral gases, establishment of the negative pressure and sealing by compression. The method can also comprise partial sealing of the module so as to leave two openings in the seal, sweeping of the internal volume by neutral gases by means of the two openings, establishment of the negative pressure and closing of the openings. | 10-23-2008 |
20090139445 | Device for Fabricating a Ribbon of Silicon or Other Crystalline Materials and Method of Fabrication - The device comprises a crucible ( | 06-04-2009 |
20100083895 | Device and Process for Producing a Block of Crystalline Material - A temperature gradient is established in a crystallization crucible by means of a heat source and a cooling system. The cooling system comprises a heat exchanger and an adjustable additional heat source. The cooling system is preferably formed by an induction coil cooled by a coolant liquid circulating in the induction coil and by an electrically conductive induction susceptor positioned between the crucible and induction coil. The fabrication process comprises heating the crucible via the top and controlling heat extraction from the crucible downwards by means of the heat exchanger and by means of regulation of the adjustable additional heat source. | 04-08-2010 |
20100089310 | DEVICE AND METHOD FOR PRODUCING SELF-SUSTAINED PLATES OF SILICON OR OTHER CRYSTALLINE MATERIALS - The device for producing a sheet of crystalline material by directional solidification of a material in liquid phase composed of a crucible provided with a bottom, side walls and at least one horizontal outlet slot arranged on a bottom part of a side wall. On its external surface in immediate proximity to the slot, the crucible presents electromagnetic means for creating magnetic repulsion forces on the material in liquid phase, at least at the level of the slot. An alternating current with a frequency comprised between 10 kHz and 300 kHz flows through the electromagnetic means. To foster stirring of the material in liquid phase, a low frequency can be used in addition to the above frequencies. | 04-15-2010 |
20110030793 | METHOD FOR PRODUCING PHOTOVOLTAIC-GRADE CRYSTALLINE SILICON BY ADDITION OF DOPING IMPURITIES AND PHOTOVOLTAIC CELL - Production of photovoltaic grade crystalline silicon is achieved by crystallization of a molten silicon feedstock, the sum of the initial donor doping element and acceptor doping element concentrations whereof is greater than 0.1 ppma, and both the acceptor and donor doping element concentrations whereof are less than 25 ppma. At least a predefined quantity of a doping material having a segregation coefficient of less than 0.1 is added to the feedstock. This addition enables a crystallized silicon to be produced the difference between the donor and acceptor doping profiles whereof is comprised between 0.1 and 5 ppma over at least 50% of the solidified silicon. A silicon presenting a concentration of at least one of the dopants is greater than or equal to 5 ppma and a difference less than or equal to 5 ppma between these two types of dopant is integrated in a photovoltaic cell. | 02-10-2011 |
20120141336 | DEVICE AND PROCESS FOR PRODUCING A BLOCK OF CRYSTALLINE MATERIAL - A temperature gradient is established in a crystallization crucible by means of a heat source and a cooling system. The cooling system comprises a heat exchanger and an adjustable additional heat source. The cooling system is preferably formed by an induction coil cooled by a coolant liquid circulating in the induction coil and by an electrically conductive induction susceptor positioned between the crucible and induction coil. The fabrication process comprises heating the crucible via the top and controlling heat extraction from the crucible downwards by means of the heat exchanger and by means of regulation of the adjustable additional heat source. | 06-07-2012 |
20120178036 | LOW PRESSURE DEVICE FOR MELTING AND PURIFYING SILICON AND MELTING/PURIFYING/SOLIDIFYING METHOD - The device for melting and purifying of a silicon feedstock comprises a crucible arranged inside a sealed chamber. A thermal gradient can be applied to the crucible by an arranged heat exchanger and a heating device. The device likewise comprises a device for reducing the pressure inside the chamber to a value lower than 10 | 07-12-2012 |
20130115762 | METHOD FOR DOPING A SEMICONDUCTOR MATERIAL - A feedstock of semiconductor material is placed in a crucible. A closed sacrificial recipient containing a dopant material is placed in the crucible. The content of the crucible is melted resulting in incorporation of the dopant in the molten material bath. The temperature increase is performed under a reduced pressure. | 05-09-2013 |