Patent ID: 9648753
Date: 2017-05-09
CPC Classifications: H05K

Claim:
1. A method for manufacturing a flexible printed circuit board, comprising: screen printing a circuit pattern with conductive paste on one side of a flat polyamide film; and sintering the circuit pattern at 290° C.˜420° C.; wherein the conductive paste is a silver paste comprising a silver powder in an amount of from 73 wt % to 88 wt %, a polymer resin in an amount of from 5.9 wt % to 9.5 wt %, and a solvent in an amount of from 5.7 wt % to 18.0 wt %; the silver powder ranges in mean size from 0.5 to 1.2 μm, and the circuit pattern after the sintering has a specific resistivity in a range of from 4.0 μΩ·cm to 6.5 μΩ·cm.