45 results about "Spherical cell" patented technology

A method for manufacturing a polishing pad containing substantially spherical cells and having high thickness accuracy includes preparing a cell-dispersed urethane composition by a mechanical foaming method; continuously discharging the cell-dispersed urethane composition from a single discharge port to a substantially central portion in the width direction of a face material A, while feeding the face material A; laminating a face material B on the cell-dispersed urethane composition; then uniformly adjusting the thickness of the cell-dispersed urethane composition by thickness adjusting means; curing the cell-dispersed urethane composition with the thickness adjusted in the preceding step without applying any additional load to the composition so that a polishing sheet including a polyurethane foam is formed; and cutting the polishing sheet.

In a cylinder block, at least one member disposed around a bore is made of a metal matrix composite including a ceramic compact having a three-dimensional mesh structure comprised of a plurality of spherical cells and a plurality of communicating pores for allowing adjacent spherical cells to communicate with each other, with the plurality of spherical cells filled with a metal.

A process for producing a ceramic molding having a three-dimensional network structure with a plurality of spherical cells and a plurality of through holes present in dividing walls between the spherical cells, includes: a step of obtaining an aggregate of coated particles in which a plurality of ceramic particles are attached to the surface of spherical synthetic resin particles; a step of arranging the aggregate of coated particles in closest packed form within a mold; a step of filling gaps in the aggregate of coated particles with a ceramic so as to give a shaped product; a step of releasing the shaped product from the mold; a step of thermally decomposing the spherical synthetic resin particles of the shaped product so as to form the spherical cells and form the plurality of through holes in dividing wall-forming sections that are present between adjacent spherical cells; and a step of sintering the ceramic particles and the ceramic so as to form the dividing walls.

Provided are a polishing pad which remedies the problem of scratches occurring when a conventional hard (dry) polishing pad is used, which is excellent in polishing rate and polishing uniformity, and which can be used for not only primary polishing but also finish polishing, and a manufacturing method therefor. The polishing pad is a polishing pad for polishing a semiconductor device, comprising a polishing layer having a polyurethane-polyurea resin foam containing substantially spherical cells, wherein the polyurethane-polyurea resin foam has a Young's modulus E in a range from 450 to 30000 kPa, and a density D in a range from 0.30 to 0.60 g / cm3.

Provided are a method for preparing a highly active human mesenchymal stem cell, which includes forming a spherical cell aggregate by cultivating human mesenchymal stem cells against gravity; a highly active stem cell prepared thereby; a cell therapeutic agent including the stem cell aggregate; and a method for forming a spherical cell aggregate by cultivating human mesenchymal stem cells, wherein the amount of E-cadherin in the mesenchymal stem cell is increased during the cultivation.

The invention relates a spherical thin-film solar cell structure, a preparation method thereof and a spatial arrangement mode of assembly composing the cell unit, belonging to the manufacturing field of the solar cell. Both a bottom electrode and an upper electrode of the spherical cell use transparent conducting films. By using the spherical structure, on one hand, sunlight in all directions canbe absorbed, thereby avoiding using a sunlight tracker; and on the other hand, light rays are refracted and reflected for many times in the small spherical body to form a good light trapping structure, thereby greatly improving the light absorption efficiency. The structure of the spherical cell assembly can enable the cells to be spatially accumulated, thereby improving the space utilization ratio to obtain a larger light receiving area. In order to ensuring the uniformity of thin film deposition, a three-dimensional rotating sample platform is used. The spherical thin-film cells are arranged in the space according to a Fibonacci spiral phyllotaxis to form the solar cell assembly. Compared with the tiled arrangement of the cells, the spatial arrangement mode can manyfold increase the light-receiving area of the cells under the condition of equal occupying area.

A fixing-unit roller includes: a core bar; and an elastic layer formed on an outer peripheral surface of the core bar. The elastic layer is formed from a porous material that contains a plurality of cells. Cells in a cross section obtained by cutting across the porous material are 0.1 μm or greater and 50 μm or less in size. A ratio of an area occupied by composite cells, which are made of partially-overlapping spherical cells, in a 200-μm square in the cross section to an area of the square is 60% or greater and 70% or less.

The invention provides a cell robot. The cell robot is formed by adopting spherical cell robot single bodies, wherein a shell of each spherical cell robot single body comprises an upper hemisphere and a lower hemisphere with the same shape; , the bottom surfaces of the two hemispheres of each spherical cell robot single body are assembled in a coinciding manner, and the centrosymmetric axes are mutually coincided; four connecting surfaces are uniformly arranged in the peripheral direction of each hemisphere. A sphere formed by the two hemispheres of each spherical cell robot single body is cut by two identical regular octahedrons formed by regular square pyramids with equal side edge length and bottom-surface edge length; each side surface of the regular octahedron and the sphere are cut to obtain one connecting surface. A connecting device is arranged on the connecting surface, and forward and backward connection modes between the two connecting surfaces are realized. Eight connecting surfaces of each single body can be connected with any connecting surface of the other cell robot single bodies, so that the plurality of cell robot single bodies form a variety of cell robots which can finish different tasks of assembling, welding and the like in different environments such as earthquake relief work, underground operation and space exploration.