The present invention relates to a poly(imide-siloxane) compound useful as passivation layer for packaging tapeless LOC, which is produced by reacting in a polar solvent a diaminosiloxane compound of the formula(1) wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 are independently an aromatic group, aliphatic group or halogenated hydrocarbon, hydroxy, or ether group, and m and n are integers such that m+n is an integer of 0˜1000; and a diamine compound of the formula(2) H2N—R—NH2   (2) wherein R is at least one selected from the below groups: with an aromatic tetracarboxylic dianhydride of the formula (3) wherein A is at least one selected from the below groups: wherein the number of moles of the compound (3) is the same as the total number of moles of compounds (1) and (2).