Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Gautier Fortin

Denis Camel

Etienne Pihan

Vanessa Amaral De Oliveira

Anis Jouini

Benoit Marie

Denis Chavrier

Nelly Plassat

A method for producing a silicon ingot, provided with symmetrical grain boundaries, including at least steps made of: (i) providing crucible with longitudinal axis, bottom of which includes a paving formed from monocrystalline cuboid silicon seeds with a square or rectangular base and arranged contiguously, the paving, when viewed according to axis, being in shape of a grid of orthogonal directions (x) and (y) parallel to edges of seeds; and (ii) proceeding with controlled solidification of silicon by growth on seeds in a growth direction collinear to axis; wherein paving in step (i) is produced from identical silicon seeds, with two seeds contiguous in direction (x) being images of each other by turning axis (y) and two seeds contiguous in direction (y) being images of each other by turning axis (x), and misorientation 2&#x3b8; between crystalline arrays of two contiguous seeds being greater than 4&#xb0;.

Method for producing a silicon ingot having symmetrical grain boundaries

A method for manufacturing a silicon cylinder by growth on seeds in a directed solidification furnace, including at least the following steps: (i) providing a crucible having a longitudinal axis (Z), in which the bottom is covered with a layer of seeds of monocrystalline silicon in a right prism shape; and (ii) proceeding with directed solidification of silicon by growth on seeds, in a direction of growth that is co-linear with the axis (Z) and with a concave solidification front, spatially or temporally; characterized in that the layer in step (i) of: one or more central seeds G; and one or more peripheral seeds Gcontiguous to the seed(s) G, the peripheral seeds Ghaving a specific size.

Method for manufacturing a silicon cylinder by growth on seeds in a directed solidification furnace

Growing community of inventors

Saint-Baldoph, France

Gautier Fortin