Patent ID: 7447045

Claim:
A board supporting method for supporting a circuit board, held by a board holding device, from a bottom side thereof for processing the circuit board, the method comprising: securing at least one positioning pin on a surface of a support table; bringing one end of at least one support pin into contact with the surface of the support table for raising/lowering the support pin; bringing the other end of the support pin into contact with a bottom face of the circuit board to support the bottom face of the circuit board; and holding the support pin in a direction substantially perpendicular to the surface of the support table; wherein the support pin is inserted into and passes through a pin-erecting through-hole of a pin-erecting guide plate positioned on the surface of the support table so that the support pin is held in a position substantially perpendicular to the pin-erecting guide plate, wherein the pin-erecting guide plate is made of any one of an elastic body, a plastic material, and a combination of an elastic body and a plastic material, and the support pin is held substantially perpendicular to the support table by an elastic force of the pin-erecting guide plate, and wherein the at least one positioning pin is erected on the surface of the support table prior to the positioning of the pin-erecting guide plate on the support table, and the positioning pin is fitted into a positioning hole formed in the pin-erecting guide plate, so that the pin-erecting guide plate is fixedly positioned onto the support table.