Patent ID: 7431792

Claim:
An apparatus for placing balls having conductivity in a predetermined pattern onto one surface of a base unit, comprising: an arrangement member, having one surface, another surface opposite to the one surface and positioning openings, wherein the positioning openings are arranged corresponding to a pattern such that the openings are through from the one surface to the another surface of the arrangement member so that the balls are inserted therein; and a transfer device, having two or more flexible line members in which core axes thereof are substantially aligned, wherein each of the line members comprises a first end and a second end that are held by a pair of holding members, and an abdomen, which is a portion of each of the line members in between the first end and the second end, wherein at least when the balls are placed, the arrangement member is positioned in a manner that the another surface of the arrangement member is opposite to the one surface of the base unit, and the line members of the transfer device are arranged in a substantially horizontal manner for only the abdomens of the line members of the transfer device to contact with the one surface of the arrangement member and the balls supplied to the one surface of the arrangement member, and the transfer device is moved horizontally with respect to the one surface of the arrangement member.