Patent EP-2254146-A1 (EP)
Inventor: PERNEL CAROLE
IPC: H01L21/20
Filed: 2010-05-11
Abstract: The semiconductor structure comprises a support (301) comprising a semiconductor layer, and two blocks (304, 305) provided on the support. The block comprises a stack including alternating layers based on a first semiconductor material and layers based on a second semiconductor material different from the first semiconductor material, and spacers (309) filling the spaces formed by a lateral tooth profile (308) such that the stack presents a flat lateral surface. The layers based on the first semiconductor material have greater dimensions than the layers based on the second material. The semiconductor structure comprises a support (301) comprising a semiconductor layer, and two blocks (304, 305) provided on the support. The block comprises a stack including alternating layers based on a first semiconductor material and layers based on a second semiconductor material different from the first semiconductor material, and spacers (309) filling the spaces formed by a lateral tooth profile (308) such that the stack presents a flat lateral surface. The layers based on the first semiconductor material have greater dimensions than the layers based on the second material such that the stack has a lateral tooth profile. The spacers: are made of a third material different from the first semiconductor material such that each of the lateral faces of the block presents alternating lateral bands based on the first material and lateral bands based on the third material promoting the growth of nanotubes or nanowires (309) exclusively coating the lateral bands based on the metal; are made of an insulating material promoting the growth of nanotubes or nanowires exclusively coating the lateral bands based on the first semiconductor material; and are formed by a first part made of a first dielectric material and a second part made of a second dielectric material corresponding to the third material of the lateral bands. One of the lateral faces of the blocks is partially covered by a catalyst material promoting the growth of nanotubes or nanowires exclusively coating the lateral bands based on the first semiconductor material or exclusively coating the lateral bands based on the third material. The two blocks are faced each other such that the lateral bands of the two blocks are coated with the material promoting the growth of nanotubes or nanowires. The two blocks are connected by nanowires or nanotubes. Each of the nanowires or the nanotubes connects a lateral band of the first block coated with the material promoting the growth of nanotubes or nanowires to a lateral band of the second block coated with the material promoting the growth of nanotubes or nanowires. The growth of nanotubes or nanowires partially coats the lateral bands in the form of particles or nanodots spaced along the bands. A thickness of the layers based on the first semiconductor material and/or the layers based on the second semiconductor material is 10-50 nm. The substrate is a type of silicon on insulator, silicon or germanium type substrates. An independent claim is included for a method for producing a semiconductor structure.