Micro-element, alignment system and assembling method
An alignment system arranges a plurality of micro-elements at positions on a mounting substrate, the micro-elements are equal in dimension and shape. The alignment system encompasses a rough alignment-apparatus including a picker having capturing-probes, each of which having a capturing-face and a magnetic-force applying portion provided on the capturing-face, and a base-plate on which the capturing-probes are arrayed with an array-pattern. In the alignment system, each of the magnetic-force applying portions applies magnetic lines on the magnetic-force receptor to capture one of the micro-elements.
1 . An alignment system configured to arrange a plurality of micro-elements at scheduled positions on a mounting substrate, each of the micro-elements including a functional face, a bottom face parallel to the functional face, a plurality of circumscribing- ridges connecting the functional and bottom faces, and a magnetic-force receptor allocated at a limited site on the functional face, the micro-elements are equal in dimension and shape, the system comprising a rough alignment-apparatus including a picker having:
a plurality of capturing-probes, each of which having a capturing-face made of flat plane and a magnetic-force applying portion provided on the capturing-face; and
a base-plate on which the plurality of capturing-probes is arrayed with a predetermined array-pattern,
wherein each of the magnetic-force applying portions applies magnetic lines on the magnetic-force receptor to capture one of the micro-elements, respectively, and positions of a particular circumscribing-ridge elected among the plurality of circumscribing-ridges and the functional face are identified by the magnetic-force receptor.
2 . The alignment systems of claim 1 , wherein a maximum diagonal-length on the functional face is one mm or less.
3 . The alignment system of claim 2 , wherein the functional face is assigned as “a first functional face”, the bottom face is assigned as “a first bottom face” the micro-elements is assigned as “a first micro-elements”, the capturing-face is assigned as “a first capturing-face”, the magnetic-force applying portion is assigned as “a first magnetic-force applying portion”, the capturing-probe is assigned as “a first capturing-probe”, the array-pattern is assigned as “a first array-pattern”, the base-plate is assigned as “a first base-plate-plate”, the picker is assigned as “a first picker”, and the magnetic-force receptor is assigned as “a first magnetic-force receptor”, and the rough alignment-apparatus further including a second picker having:
a plurality of second capturing-probes, each of which is equal in dimension and shape to the first capturing-probes, and each of which having a second capturing-face made of flat plane, and a second magnetic-force applying portion is arranged on each of the second capturing-faces, and
a second base-plate-plate, on which the plurality of second capturing- probes is arrayed in a second array-pattern that is defined related to the first array-pattern on the mounting substrate,
wherein each of the second magnetic-force applying portions applies second magnetic lines to a second magnetic-force receptor provided on a second functional face defined on one of second micro-elements, respectively, under a same rule as the first magnetic-force receptor and captures the one of the second micro-elements.
4 . The alignment system of claim 3 , further comprising a precise alignment-apparatus having a precise alignment-tray with an array of a plurality of concaves to which the first and second array-pattern is assigned,
wherein each of the plurality of concaves has inscribed angles which are equal to an angle of a first ridge-to-be-mated selected from a plurality of circumscribing-ridges connecting the first functional and bottom faces, and are equal to an angle of a second ridge-to-be-mated selected from the plurality of circumscribing-ridges connecting the second functional and bottom faces, which are same angle as the first ridge-to-be-mated, respectively.