Patent ID: 7829135

Claim:
A multi-layered circuit pattern forming method comprising: forming a multi-layered circuit pattern on a substrate by ejecting solutions onto the substrate from a liquid ejection head with a nozzle row including a plurality of nozzles while repeating relative scanning movement between the liquid ejection head and the substrate in order to stack multiple layers of the multi-layered circuit pattern, wherein, when a layer is formed above another layer, using a nozzle row being the same as a nozzle row used for forming the another layer, the liquid is ejected by having the position of the nozzles with respect to the substrate shifted in the direction of the nozzle row so as to have liquid ejected from different nozzles on the same nozzle row stacked in a stacking direction; and wherein an amount of displacement of start position for each successive stacked printer layer with respect to immediate previous printed layer (L) in the direction of the nozzle row is determined by L=W*N/S, where (W) is a length of the nozzle row, (S) is an integer equal to or more than 5 representing a number of layers of the multilayered circuit board, and (N) is an integer ranging from 1 to (S-1).