Method for disposing fine objects, apparatus for arranging fine objects, illuminating apparatus and display apparatus

A method for disposing fine objects, comprising:

• a substrate preparing step for preparing a substrate in which positions where fine objects are disposed are defined, the fine objects having a maximum physical dimension of 100 μm or smaller;
• a fluid introducing step for introducing a fluid containing the fine objects onto the substrate;
• and
• a fine object disposing step for disposing the fine objects, which are contained in the fluid introduced onto the substrate, in a predetermined orientation at predetermined positions on the substrate by electromagnetic force;
• wherein
• the fine objects respectively include a plurality of portions mutually differing in at least one of physical properties and shapes;
• further, at least the fine objects include an alignment structure configured to dispose the fine objects on the substrate so that the fine objects are aligned in a predetermined orientation defined by disposition of the plurality of portions, which mutually differ in at least one of physical properties and shapes, relative to the substrate;
• the substrate is a transparent substrate and a semiconductor film is formed on one surface of the transparent substrate;
• in the substrate preparing step, light whose incidence region is set to a certain pattern is caused to be incident on the other surface of the transparent substrate, so that while the light keeps incident, portions of the semiconductor film on which the light is incident are selectively lowered in resistance, whereby the selectively lowered-in-resistance portions of the semiconductor film are formed as a first electrode and a second electrode, and
• in the fine object disposing step, a voltage is applied between the first electrode and the second electrode formed on the substrate so that the fine objects are disposed in the predetermined orientation and at the predetermined positions in areas where the first electrode and the second electrode face each other.

A method for disposing fine objects, comprising:

• a substrate preparing step for preparing a substrate in which positions where fine objects are disposed are defined, the fine objects having a maximum physical dimension of 100 μm or smaller;
• a fluid introducing step for introducing a fluid containing the fine objects onto the substrate;
• and
• a fine object disposing step for disposing the fine objects, which are contained in the fluid introduced onto the substrate, in a predetermined orientation at predetermined positions on the substrate by electromagnetic force;
• wherein
• the fine objects respectively include a plurality of portions mutually differing in at least one of physical properties and shapes;
• further, at least the fine objects include an alignment structure configured to dispose the fine objects on the substrate so that the fine objects are aligned in a predetermined orientation defined by disposition of the plurality of portions, which mutually differ in at least one of physical properties and shapes, relative to the substrate;
• the fine objects each include a magnetized ferromagnetic material;
• the substrate includes a magnetic field generating portion, the magnetic field generating portion including coils defined by a multilayer interconnection structure provided on the substrate, wherein each interconnection of the multilayer interconnection structure is connected to each other by a contact;
• the ferromagnetic material defines an alignment structure of the fine objects and the magnetic field generating portion defines an alignment structure of the substrate;
• and
• in the fine object disposing step, by a magnetic field generated by the magnetic field generating portion, the fine objects are disposed in the predetermined orientation and at the predetermined positions defined by areas where the magnetic field is generated by the magnetic field generating portion.